Reported Speech

In the English language, there are two ways of conveying what someone else has said: direct/quoted speech and indirect/ reported speech.
Direct/quoted speech, involves quoting the exact words uttered by the person, within inverted commas or quotation marks. For example: She said, “I won’t be coming home tonight ” is an example of direct speech. Note that in this type of speech, a comma is most often used before starting the exact quote within the inverter commas.

Indirect/reported speech, on the other hand, does not have to be within quotes or reported word-to-word. In fact, unless one is relaying the exact words spoken, one should never use quotation marks. For example: She told us that she wouldn’t be coming home that night is an example of reported speech. Note that the verb tense necessarily changes in reported speech. This is because when we report speech, we are talking, obviously, about something that was said in the past. Hence, it becomes necessary to use the past tense of the verb.

DIRECT SPEECH	REPORTED SPEECH
He said, “I’m fine.”	He said that he was fine.
He said, “I’ve been married for three years.”	He said that he had been married for three years.
He said, “I went to the theater yesterday.”	He said that he had gone to the theatre the day before.
He said, “The show was already underway when the chief guest arrived.”	He said that the show was already underway when the chief guest arrived. (no change in tense)

When we are reporting what someone else said, we normally don’t use their exact words with quotation marks (direct speech), but instead we use indirect speech (also called reported speech). Indirect speech is introduced using certain phrases.

Example:

He says/said …

She explains/explained …

She tells/told me …

He asks/asked …

Reporting Verbs

Reporting verbs are used in reported speech

The most common reporting verbs are say and tell. However, there are a number of other reporting verbs that can be used instead of say or tell to make more efficient (i.e. shorter) statements and questions.

Consider this original statement in direct speech:

'I'm sure that everything will be alright'

If we reported the statement with say, we would get :

He said that he was sure that everything would be alright

This is an acceptable statement in English, if rather long. However, the words I'm sure that... in this sentence can have the function of assuring someone. Therefore, we can use the reporting verb assure

He assured me that everything would be alright

This is a) shorter, and b) makes the function of the sentence absolutely clear.

Common reporting verbs - say pattern

The following common reporting verbs follow the same pattern as say 

i.e. verb + (that) + clause :

admit

advise*

agree

announce

claim

complain

confirm

declare

explain

insist

mention

promise*

propose 

say

suggest

warn*

* also used with other patterns - see below

Common reporting verbs - tell pattern

The following common verbs follow the same pattern as tell 

i.e. verb + direct object + (that) + clause :

advise

assure

convince

inform

notify

persuade

promise

reassure

remind

tell

warn

Reporting actions : requests, promises etc

These are usually reported using an infintive structure :

reporting verb + infintive with to

Examples:

They argreed to pay the legal costs.

He promised to come as soons as possible.

Common reporting verbs that follow this pattern are :

agree

ask

claim

demand

offer

promise

propose

refuse

threaten

Some verbs can be followed by an object and infintive :

reporting verb + direct object + infintive with to

Examples:

He reminded me to call Kath.

She warned them not to mention it.

Common reporting verbs that follow this pattern are :

advise

ask

beg

convince

encourage

forbid

instruct

invite

order

persuade

remind

tell

urge

warn (not to)

Reporting verbs followed by a gerund

Some reporting verbs are followed by a gerund, not an infinitive :

Direct speech : 'Why don't we have the party at Peter's place?'

Reported speech : She suggested having the party at Peter's place.

Common reporting verbs that can be followed by a gerund are :

admit

deny

mention

proposed

report

suggest

NB All of these reporting verbs can also use a verb + that + clause structure (see above).

Compare :

He admitted that he had taken the money.

He admitted taking the money.

She proposed setting up a committee.

She proposed that we set up a committee.

He mentioned seeing Martin.

He mentioned that he had seen Martin

The sentences in each pair have the same meaning.

Change of persons/pronouns

If there is a pronoun in Direct Speech, it has possibly to be changed in Reported Speech, depending on the siutation.

• Direct Speech → Susan: “I work in an office.”
• Reported Speech → Susan said (that) she worked in an office.

Here I is changed to she.

MODAL AUXILIARIES

Modal Auxiliary Verbs

What are "modal auxiliary verbs"?

The verbs can, could, will, would, should, may, might, must, ought and shall are verbs which 'help' other verbs to express a meaning: it is important to realize that these "modal verbs" have no meaning by themselves. A modal verb such as would has several varying functions; it can be used, for example, to help verbs express ideas about the past, the present and the future. It is therefore wrong to simply believe that "would is the past of will": it is many other things.

A Few Basic Grammatical Rules Applying to Modal Verbs

• Modal verbs are NEVER used with other auxiliary verbs such as do, does, did etc. The negative is formed simply by adding "not" after the verb; questions are formed by inversion of the verb and subject:

You should not do that.
Could you pick me up when I've finished?

• Modal verbs NEVER change form: you can never add an "-s" or "-ed", for example.
• Modal verbs are NEVER followed by to, with the exception of ought to.

Common Modal Verbs

Can
Could
May
Might
Must Ought to
Shall
Should
Will
Would

What Sort of Meanings Do Modals Give to Other Verbs?

The meaning are usually connected with ideas of DOUBT, CERTAINTY, POSSIBILITY and PROBABILITY, OBLIGATION and PERMISSION (or lack of these). You will see that they are not used to talk about things that definitely exist, or events that definitely happened. These meanings are sometimes divided into two groups:

DEGREES OF CERTAINTY: certainty; probability; possibility; impossibility

OBLIGATION/FREEDOM TO ACT: permission,lack of permission; ability; obligation.

Each Modal Verb Separately, and the Functions They Help to Express

WILL

Making personal predictions

• I don't think the Queen will ever abdicate. 
• I doubt if I'll stay here much longer.

Talking about the present with certainty (making deductions)

• I'm sure you will understand that there is nothing the Department can do
• There's a letter for you. It'll be from the bank: they said they'd be writing.

Talking about the future with certainty

• I won't be in the office until 11; I've got a meeting.
• Don't bother ringing: they'll have left for their 10 o'clock lecture.

Talking about the past with certainty

I'm sure you will have noticed that attendance has fallen sharply.

Reassuring someone

• Don't worry! You'll settle down quickly, I'm sure.
• It'll be all right! You won't have to speak by yourself.

Making a decision

• For the main course I'll have grilled tuna.
• I'm very tired. I think I'll stay at home tonight.

Making a semi-formal request

• Will you open the window, please? It's very hot in here.
• Sign this, will you?

Offering to do something

You stay there! I'll fetch the drinks.

Insistence; habitual behavior

• I'm not surprised you don't know what to do! You will keep talking in class.
• Damn! My car won't start. I'll have to call the garage.

Making a promise or a threat

• You can count on me! I'll be there at 8 o'clock sharp.
• If you don't finish your dinner off, you'll go straight to bed!

SHALL

Shall is a form of will, used mostly in the first person. Its use, however, is decreasing, and in any case in spoken English it would be contracted to "-ll" and be indistinguishable from will.

The only time you do need to use it is in questions, when:

Making offers

Shall I fetch you another glass of wine?

Making suggestions

Shall we go to the cinema tonight?

MAY & MIGHT

May & might sometimes have virtually the same meaning; they are used to talk about possibilities in the past, present or future. ("Could" is also sometimes used).

May is sometimes a little bit "more sure" (50% chance); whereas might expresses more doubt (maybe only a 30% chance).

May & might are used, then, for:

Talking about the present or future with uncertainty

• She may be back in her office: the lecture finished ten minutes ago.
• I may go shopping tonight, I haven't decided yet.
• England might win the World Cup, you never know.

Talking about the past with uncertainty

I'm surprised he failed. I suppose he might have been ill on the day of the exam.

They can also sometimes be used for talking about permission, but usually only in formal situations. Instead of saying May I open a window? we would say Is it all right/OK if I open a window? or Can I open a window? for example. You might, however, see:

Students may not borrow equipment without written permission.

MAY

Talking about things that can happen in certain situations

• If the monitors are used in poorly lit places, some users may experience headaches.
• Each nurse may be responsible for up to twenty patients.

With a similar meaning to although

The experiment may have been a success, but there is still a lot of work to be done. (= Although it was a success, there is still ...)

MIGHT

Saying that something was possible, but did not actually happen

You saw me standing at the bus stop! You might have stopped and given me a lift! 

 WOULD

As the past of will, for example in indirect speech

"The next meeting will be in a month's time" becomes --> He said the next meeting would be in a month's time.

Polite requests and offers (a 'softer' form of will)

• Would you like another cup of tea?
• Would you give me a ring after lunch?
• I'd like the roast duck, please.

In conditionals, to indicate 'distance from reality': imagined, unreal, impossible situations

• If I ruled the world, every day would be the first day of Spring.
• It would have been better if you'd word processed your assignment.

After 'wish', to show regret or irritation over someone (or something's) refusal or insistence on doing something (present or future)

• I wish you wouldn't keep interrupting me.
• I wish it would snow.

Talking about past habits (similar meaning to used to)

When I was small, we would always visit relatives on Christmas Day.

Future in the past

The assassination would become one of the key events of the century.

CAN & COULD

Talking about ability

• Can you speak Mandarin? (present)
• She could play the piano when she was five. (past)

Making requests

• Can you give me a ring at about 10? 
• Could you speak up a bit please? (slightly more formal, polite or 'softer')

Asking permission

• Can I ask you a question?
• Could I ask you a personal question? (more formal, polite or indirect)

Reported speech

Could is used as the past of can.

He asked me if I could pick him up after work.

General possibility

• You can drive when you're 17. (present)
• Women couldn't vote until just after the First World War.

Choice and opportunities

• If you want some help with your writing, you can come to classes, or you can get some 1:1 help.
• We could go to Stratford tomorrow, but the forecast's not brilliant. (less definite)

Future probability

Could (NOT can) is sometimes used in the same way as might or may, often indicating something less definite.

When I leave university I might travel around a bit, I might do an MA or I suppose I could even get a job.

Present possibility

• I think you could be right you know. (NOT can)
• That can't be the right answer, it just doesn't make sense.

Past possibility

If I'd known the lecture had been cancelled, I could have stayed in bed longer.

MUST

Examples here refer to British English; there is some variation in American English.

Necessity and obligation

Must is often used to indicate 'personal' obligation; what you think you yourself or other people/things must do. If the obligation comes from outside (eg a rule or law), then have to is often (but not always) preferred:

• I really must get some exercise.
• People must try to be more tolerant of each other.
• You musn't look - promise?

If you own a car, you have to pay an annual road tax.

Strong advice and invitations

• I think you really must make more of an effort.
• You must go and see the film - it's brilliant.
• You must come and see me next time you're in town.

Saying you think something is certain

• This must be the place - there's a white car parked outside.
• You must be mad.
• What a suntan! You must have had great weather.

The negative is expressed by can't:

• You're going to sell your guitar! You can't be serious!
• She didn't wave - she can't have seen me.

SHOULD

Giving advice

• I think you should go for the Alfa rather than the Audi.
• You shouldn't be drinking if you're on antibiotics.
• You shouldn't have ordered that chocolate dessert - you're not going to finish it.

Obligation: weak form of must

• The university should provide more sports facilities.
• The equipment should be inspected regularly.

Deduction

The letter should get to you tomorrow - I posted it first class.

Things which didn't or may/may not have happened

• I should have renewed my TV licence last month, but I forgot.
• You shouldn't have spent so much time on that first question.

OUGHT TO

Ought to usually has the same meaning as should, particularly in affirmative statements in the present:

You should/ought to get your hair cut.

Should is much more common (and easier to say!), so if you're not sure, use should.

Resource(s):

http://www.englishpage.com/modals/modalintro.html

http://library.bcu.ac.uk/learner/Grammar%20Guides/3.07%20Modals.htm

CONDITIONAL SENTENCES

Conditional sentences are sentences expressing factual implications, or hypothetical situations and their consequences. They are so called because the validity of the main clause of the sentence is conditional on the existence of certain circumstances, which may be expressed in a dependent clause or may be understood from the context.

A full conditional sentence (one which expresses the condition as well as its consequences) therefore contains two clauses: the dependent clause expressing the condition, called the protasis; and the main clause expressing the consequence, called the apodosis. An example of such a sentence (in English) is the following:

If it rains, the picnic will be cancelled.

Here the condition is expressed by the clause "If it rains", this being the protasis, while the consequence is expressed by "the picnic will be cancelled", this being the apodosis. (The protasis may either precede or follow the apodosis; it is equally possible to say "The picnic will be cancelled if it rains".)

Languages use a variety of grammatical forms and constructions in conditional sentences. The forms of verbs used in the protasis and apodosis are often subject to particular rules as regards their tense and mood. Many languages have a specialized type of verb form called the conditional mood – broadly equivalent in meaning to the English "would (do something)" – for use in some types of conditional sentence.

Conditional tenses are used to speculate about what could happen, what might have happened, and what we wish would happen. In English, most sentences using the conditional contain the word if. Many conditional forms in English are used in sentences that include verbs in one of the past tenses. This usage is referred to as "the unreal past" because we use a past tense but we are not actually referring to something that happened in the past. There are five main ways of constructing conditional sentences in English. In all cases, these sentences are made up of an if clause and a main clause. In many negative conditional sentences, there is an equivalent sentence construction using "unless" instead of "if".

THE ZERO CONDITIONAL

The zero conditional is used for when the time being referred to is now or always and the situation is real and possible. The zero conditional is often used to refer to general truths. The tense in both parts of the sentence is the simple present. In zero conditional sentences, the word "if" can usually be replaced by the word "when" without changing the meaning. 

From:

If + Simple Present, + Simple Present

Examples:

• If you run, you sweat.
• If I drink a lot of alcohol, I get a hangover.
• If it’s icy, the floor is slippery.

In all of the above examples, the second event is only true if the first event happens.

TYPE 1 CONDITIONAL

The type 1 conditional refers to a possible condition and its probable result. These sentences are based on facts, and they are used to make statements about the real world, and about particular situations. We often use such sentences to give warnings. In type 1 conditional sentences, the time is the present or future and the situation is real. These situations take place if a certain condition is met. It is possible and also very likely that the condition will be fulfilled.

Form:

If + Simple Present, + Simple Future

Examples:

• If it is sunny, I will go to the beach.
• If she does well in the competition, she will get the reward.
• If Takumi asks Hachiko to marry her, she will say “yes”.

In all of these examples, the second event is only true where the first event or condition is completed.

TYPE 2 CONDITIONAL

The type 2 conditional is used to refer to a time that is now or any time, and a situation that is unreal. These sentences are not based on fact. The type 2 conditional is used to refer to a hypothetical condition and its probable result. In type 2 conditional sentences, the if clause uses the simple past, and the main clause uses the present conditional.

Form:

if + Simple Past, + would + infinitive

Were / Was

In conditional type 2, we usually use in the if clause "were" instead of "was" even if the pronoun is I, he, she or it. "were" here is a subjunctive form.

NOTE: "was" is also a possible form.

Examples:

• If I won the lottery, I would buy a huge mansion.
• If Kurt lived in New York, she would live in Manhattan.
• If Kaneki was a vegetarian, he wouldn’t eat meat.

All of the above examples are technically possible situations (it’s possible to win the lottery, if you play) but they are all very unlikely situations. To express this, we use the second conditional tense.

TYPE 3 CONDITIONAL

The type 3 conditional is used to refer to a time that is in the past, and a situation that is contrary to reality. The facts they are based on are the opposite of what is expressed. The type 3 conditional is used to refer to an unreal past condition and its probable past result. In type 3 conditional sentences, the if clause uses the past perfect, and the main clause uses the perfect conditional.

Form:

if + Past Perfect, + would + have + Past Participle

Examples:

• If I had been born in France, I would have spoken French.
• If Helen had seen the painting first, she might have bought it.
• If Craig hadn’t been born in Oxford, he would have had a very different accent.

Using " unless"

"Unless" means the same as "if ... not", and has a negative value. It is frequently (but not only) used in conditional statements where the verb of the main clause is also  in the negative.

      You wouldn't have fallen over unless there'd been a banana skin on the ground.
-->You wouldn't have fallen over if there hadn't been a banana skin on the ground. 

Things to remember

1. The main clause can also be at the beginning of the sentence. In this case, don't use a comma.

Examples:

• "Phosphorus burns if you expose it to air."
• " I will send her an invitation if I find her address."
• " I would travel around the world if I had a million dollars."
• "He wouldn't have had that terrible accident if he had been careful."

2. Main clause and/or if clause might be negative.

Example:

• If I don’t see him this afternoon, I will phone him in the evening.
• If he had been careful, he wouldn't have had an accident.

Another Way to Explain Conditional Sentences

You have probably noticed that different teachers, textbooks, and Web sites sometimes explain the same thing in different ways. This seems to be especially true of conditional sentences. However, two different explanations can both be correct, especially if the difference is due to the fact that complicated material has been organized in different ways. This is often true of explanations of conditionals that you find in your textbooks. Here conditional sentences are divided into three types based on their meanings: real, predictive, and imaginative conditional sentences.

A. Real conditional sentences can express generalizations and inferences.

1. Generalizations include facts that are always true and never change, and they include present or past habitual activities that are or were usually true.

Examples of real conditional sentences expressing facts:

If water boils, it turns to steam.

2. Inferences are often expressed in real conditional sentences.

Real conditionals expressing inferences usually have parallel verb phrases in both clauses. However, if a modal which explicitly expresses an inference (must or should, for example) is used in the main clause, parallel verb phrases are not used.

Examples of real conditional sentences expressing inferences:

If today is Wednesday, it is George’s birthday.

B. Predictive conditional sentences can express predictions and plans.

1. Predictive conditional sentences usually contain simple present tense in the if-clause and will or be going to in the result clause. However, a weaker modal of prediction (may or should, for example) can be used in the result clause to express less certainty.

2. Examples of predictive conditional sentences:

If the exam is hard, many students are going to fail.

C. Imaginative conditional sentences are the most difficult for many learners of English because of the unusual relationship between form (the tenses used) and meaning.

In this type of conditional sentence, past tense refers to present or future time; past perfect tense refers to past time. Another problem for many learners of English is that were (not was) is used with singular subjects. Be is the only English verb with two past tense forms, but only one of them (were) is used in imaginative conditional sentences.

Imaginative conditional sentences can express hypothetical or contrary-to-fact events or states.

1. Hypothetical events or states are unlikely but possible in the present or future.

Imaginative conditional sentences expressing hypothetical events or states have a past tense verb in the if-clause and would + verb (or might or could + verb) in the result clause.

Examples of hypothetical conditional sentences (present and/or future time):

• If George had enough money, he would buy a new car.
• If I won the lottery, I would buy you a present.
• If she knew the answer, she would tell us.

(George probably does not have enough money; I probably will not win the lottery; she probably does not know the answer.)

2. Contrary-to-fact events or states are either impossible in the present time or did not happen in the past.

Imaginative conditional sentences expressing present contrary-to-fact events or states have a past verb in the if-clause and would + verb (or might or could + verb) in the result clause. Some examples:

• If I were you, I would not do that.
• If she studied for exams, she would get better grades.
• If it were raining, the streets would be wet.

(I am not you; she doesn’t study for exams; it isn’t raining.)

Imaginative conditional sentences expressing past contrary-to-fact events or states have a past perfect verb in the if-clause and would + have + verb (or might or could + have + verb) in the result clause. Some examples:

• If George had had enough money, he would have bought a new car.
• If I had won the lottery, I would have bought you a present.
• If she had known the answer, she would have told us.

(George did not have enough money; I did not win the lottery; she did not know the answer.)

Test on Conditional Sentences Type 1, 2 and 3

1. If you (go) ....out with your friends tonight, I (watch) ....the football match on TV.
2. I (earn) ....a lot of money if I (get) ....that job.
3. If she (hurry / not) ...., we (miss) ....the bus.
4. If he (try) ....harder, he (reach) ....his goals.
5. I (buy) ....these shoes if they (fit).
6. It (surprise / not) ....me if he (know / not) ....the answer.
7. If we (listen) ....to the radio, we (hear) ....the news.
8. If you (switch) ....on the lights, you (fall / not) ....over the chair.
9. She (come) ....to our party if she (be / not) .... on holiday.

scroll down for answers!

Answers!

1. If you go out with your friends tonight, I will watch the football match on TV.
2. I will earn a lot of money if I get that job.
3. If she does not hurry, we will miss the bus.
4. If he tried harder, he would reach his goals.
5. I would buy these shoes if they fitted.
6. It would not surprise me if he did not know the answer.
7. If we had listened to the radio, we would have heard the news.
8. If you had switched on the lights, you would not have fallen over the chair.
9. She would have come to our party if she had not been on holiday.

Sources and Test:

http://linguapress.com/grammar/conditionals.htm

http://istudyenglishonline.com/english-tenses/conditional/

http://www.edufind.com/english-grammar/conditional/

https://en.wikipedia.org/wiki/Conditional_sentence

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences\

http://faculty.deanza.edu/flemingjohn/stories/storyReader$18

https://www.ego4u.com/en/cram-up/tests/conditional-sentences-3

ACTIVE AND PASSIVE VOICE

1. Active Voice

Active voice is used to express the subject of the verb which is performing the action or causing the happening described by the verb. With active voice. we learn who or what is the one responsible of the action immediately because the actor is express at the beginning of the sentence. Active voice create more powerful sentences than passive voice.

Use of active voice:

1. Active voice is used in a clause whose subject expresses the agent of the main verb.

2. Subject can be easily identified by asking ‘who’ or ‘what’ to the verb.

3. Sentences are short and easily understandable.

Example :

John wrote the letter.

    - John (subject) performs the action denoted by the verb (write).

2. Passive Voice

If someone use passive voice, it means they want to focus more on the object. Passive voice focuses on who or what is receiving the action and not on who or what is performing the action. The actors, in passive voice, are told at the end of the sentences or maybe even unknown.

Use of passive voice:

1. It is used if we don‘t need to know or don‘t know the actor performing the job.

2. We use passive voice if we want to know more about  the job than the actors.

Example: 

My bike was stolen.

In the example above, the focus is on the fact that my bike was stolen. I do not know who did it. Sometimes a statement in passive is more polite than active voice.

A mistake was made.

In this case, I focus on the fact that a mistake was made, but I do not blame anyone. Sometimes passive voice also used to express “not in purpose” things.

Recognizing Passive Voice

You can recognize passive voice easily because passive voice will always have "to be" in the clauses or sentences. on the other hand,the presences of "to be" doesn't always mean that the clauses or sentences are passive voice. Another way to recognize passive voice is that they may have "by the" after the verbs when they try to tell us the actors performing the actions.

PATTERNS

Simple Present Tense

Active: Subject + infinitive + object

The librarian lend classic books.

Passive: S + to be + past participle + by object

Classic books are lent by the librarian.

Present Continuous Tense

Active: Subject + to be (is/am/are) being + present participle + object

My lecturer is giving many assignments.

Passive: S + to be (is/am/are) + being + past participle + by object

Many assignments are being given by my lecturer.

Present Perfect Tense

Active: Subject + has/have + past participle + object

Kaneki has eaten many ghouls.

Passive: S + have/has been + past participle + by object

Many ghouls has been eaten by Kaneki.

Simple Past Tense

Active: Subject + past participle + object

Kishimoto wrote a good manga.

Passive: S + was/were + past participle + by object

A good manga was written by Kishimoto.

Past Continuous Tense

Active: S + was/were + being + past participle + object

They were watching a horror movie when I slept.

Passive: S + was/were + being + past participle +by object

A horror movie were being watched by them when I slept.

Past Perfect Tense

Active: Subject + had + past participle + object

My mom had sent the food.

Passive: S + had been + past participle + by object

The food had been sent by my mom.

Simple Future Tense

Active: Subject + will + infinitive + object

I will present my thesis tomorrow. 

Passive: S + will + be + past participle + by object

My thesis will be presented tomorrow by me.

PASSIVE VOICE WITH MODALS

“CAN, MAY, MIGHT, SHOULD, MUST, OUGHT TO”

The places of subjects and objects will be changed with each other. Past participles will be used only in passive voice. Auxiliary "be" are needed when we try to change active sentences with modals to passive. We place the auxiliary "be" after the modals.

Active voice: CAN

She can play a violin. 

She cannot play a violin.

Can she play a violin?

Passive voice: CAN BE

A violin can be played by her.

A violin cannot be played by her.

Can a violin be played by her?

Active voice: MAY

I may buy the computer.

I may not buy the computer.

May I buy the computer?

Passive voice: MAY BE

The computer may be bought by me.

The computer may not be bought by me.

May the computer be bought by me?

Active voice: MIGHT 

Guests might play chess.

Guests might not play chess.

Passive voice: MIGHT BE

Chess might be played by guests.

Chess might not be played guests.

Active voice: SHOULD

Students should study all lessons.

Students should not study all lessons.

Should students study all lessons?

Passive voice: SHOULD BE

All lessons should be studied by students.

All lessons should not be studied by students.

Should all lessons be studied by students?

Active voice: MUST

You must learn the test-taking strategies.

You must not learn the test-taking strategies.

Passive voice: MUST BE

Test-taking strategies must be learnt by you.

Test-taking strategies must not be learned by you.

Active voice: OUGHT TO

They ought to take the examination.

Passive voice: OUGHT TO BE

The examination ought to be taken by them.

Transitive and Intransitive Verbs

Transitive verbs are verbs which have subjects and object in one sentences or clauses. Transitive verbs can be in active or passive voice. Transitive verbs in active voice are the verbs which are followed by the direct objects. A transitive verbs needs object to express full meaning.

Example: The boy kicked the ball. The subject is the actor who does the action and the direct object is the receiver of the action.

Meanwhile, Transitive passive verbs have the subject receiving the action.

Examples: The ball was kicked by the boy. The ball was kicked hard. The verbs in the transitive passive voice always have "is, am, are, was, were, be, being, or been" as auxiliaries.

Intransitive verbs don't have receiver of the action. They are classified as intransitive complete or intransitive linking. Intransitive linking are sentences with a predicate nominative or predicate adjective. 

Examples: The girl is Mary. (predicate nominative) The girl is cute. (predicate adjective) Intransitive complete are all the verbs that don't fit one of the other kinds of transitive or intransitive verbs. 

Examples: The bell rang suddenly. The girl knitted all evening. (There is no receiver of the action.) They were here. (no action or predicate nominative or predicate adjective).

Intransitive verb cannot be changed into passive voice. The sentences which have intransitive verbs cannot be changed into passive voice. The reason behind that statement is that there is no object in the sentences and we all know that without objects we cannot change the sentences to passive voice.

List of common intransitive verbs:

adapt       agree

arrive      become

belong    collapse

cost        depend

die          emerge

exist       fly 

go          happen

laugh     occur     

stay       rise        

sit          sleep           

swim     jump      

explode

Active and passive voice exercise

I. Sentences are given in the active voice. Change them into the passive voice.

1. Ms Sullivan teaches us grammar.
2. The teacher praised him.
3. The firemen took the injured to the hospital.
4. An earthquake destroyed the town.
5. The boy’s work pleased the teacher.
6. The fire damaged the building.
7. Who taught you French?
8. The manager will give you a ticket.
9. Spectators thronged the streets.
10. Everyone will blame us.
11. The wind blew down the trees.
12. The police caught the thieves.
13. Alice posted the letter.
14. The hostess received us.
15. They/somebody killed the snake with a stick.

II. Tell whether the verbs in the following sentences are transitive active, transitive passive, intransitive linking, or intransitive complete.

1. Yesterday Grandma was hit by a car.
2. My former classmates were seen at the reunion.
3. The lamp for the study was broken on the way home.
4. At camp taps had been blown every night.
5. The dirty clothes will be sent to be cleaned.

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Answers:

I.

1. We are taught grammar by Ms Sullivan.
2. He was praised by the teacher.
3. The injured were taken to the hospital by the firemen.
4. The town was destroyed by an earthquake.
5. The teacher was pleased with the boy’s work.
6. The building was damaged by the fire.
7. By whom were you taught French?
8. You will be given a ticket by the manager.
9. The streets were thronged with spectators.
10. We will be blamed by everyone.
11. The trees were blown down by the wind.
12. The thieves were caught by the police.
13. The letter was posted by Alice.
14. We were received by the hostess.
15. The snake was killed with a stick.

II. 

1. was hit - transitive passive
2. were seen - transitive passive
3. was broken - transitive passive
4. had been blown - transitive passive
5. will be sent - transitive passive

Sources:

https://www.ego4u.com/en/cram-up/grammar/passive

http://cdac.olabs.co.in/?sub=84&brch=23&sim=186&cnt=1

https://owl.english.purdue.edu/owl/owlprint/539/

http://www.studyandexam.com/passive-voice-for-modal.html

http://www.studyandexam.com/passive-voice-for-intransitive-verb.html

http://www.grammarbank.com/transitive-intransitive-verbs.html

http://www.englishpractice.com/grammar/active-passive-voice-exercise-3/

http://www.dailygrammar.com/Lesson-118-Transitive-and-Intransitive-Verbs.htm