Auxiliary Verb

The three most common auxiliary verbs 

be, do and have

  • I am Eating = Eating is  main verb. Am is the auxiliary verb.
  • We have played = Played is the main verb. We is the auxiliary verb.
  • Do you drink? = Drink is the main verb. Do is  auxiliary verb.

Do / does / did

Do is common to form a questions and making negatives.

Did is  the past tense of do and does.

In statements

  • We do our level best.

  • She Does the work.

  • they do the home work..

  • we do hard work.

  • He/she does the project work.

In questions

  • Does He know your brother?

  • Does  she work here?

  • Do they come early?

  • Does he come form india?

  • Does he/she practise to play?

In negative sentences

  • He does not he (doesn't)
  • They do not. (they don't)
  • you do not. (you don't)
  • people do not. (people don't)
  • He/she does not. (he/she doesn't)

Be = am / is / are

Be can be used as  auxiliary verb as well as main verb.

Is shows that present action is happening now  and is going to happen in the future.

Be is also use to make passives.

Are used for they and we.

Was is used to the past tense of am and is.

Were we used to you,they,we

In statements

  • We are Indians.
  • I am 19. 
  • they are playing.

  • you are watching.

  • He/she is cool.

In questions

  • Am I do hard work?
  • Are you coming late?

  • Are they give money?

  • Are they cooking food?

In negative sentences

  • I am not. (I am n't)
  • We are not. (We aren't)

  • You are not. (You aren't)

  • They are not. (they aren't)

  • He/she is not. (he/she isn't)

Have = has / had

Have is used for Present Perfect tense and it always follows the past participle.

Has is used to third person for singular.

Had is used to past tenses  of past perfect tense. it explain the action that began in the past and still continuing into the present or it stopped recently.

In statements

We have car.

You have good knowledge.

They have had it before.

We  have called you two times.

He/she has lived in U.S.A.

In negative sentences

We have not. (We haven't/ we've not)

I have not. (I haven't/I've not)

they have not. (They haven't/they've not)

You have not. (You haven't/You've not)

He/she has not (he/she hasn't)


 Common auxiliary verbs are:

Shall , Should, may ,might, could, can, must, ought to, used to etc..

These auxiliary verbs are also known as model verbs. we use this verbs for possibility, necessity, and obligation.

For example:

Suma is late. She might be preparing. (possibility)

We should clean our house today. (obligation)

we must wear a tie to school. (necessity)


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