Auxiliary Verbs Be,Do, Have

Hello folk this topic is very interesiting. An auxiliary verb helps the main (full) verb and is also called a "helping verb." With auxiliary verbs, you can write sentences in different tenses, moods, or voices. Auxiliary verbs are: be, do, have, will, shall, would, should, can, could, may, might, must, ought, etc. 

  • I think I should study harder to master English.
  • am having a cup of coffee.
  • You have been practicing hard.
  • It was written by a petitioner.
  • You may choose what you like.
The verb forms of be, do, and have can be used either as a main (full) verb or an auxiliary verb. The following examples show these verbs used as auxiliary verbs. 

1. "Be" as an auxiliary verb

a.Used in progressive sentences:
  • I am taking a bath.
  • She is preparing dinner for us.
  • They have been studying all night.
b.Used in passive sentences:
  • I was given a free meal.
  • He was seen by fans at the airport.
  • This song has been sung by all nations.
2."Do" as an auxiliary verb

a. Used in negative sentences:
  • I do not know the truth.
  • She doesn’t agree with me.
  • They didn’t arrive here yet.
b.Used in questions:
  • Do you want to have another one?
  • Did he finish his homework?
  • Do we need to keep going straight?
3."Have" as an auxiliary verb

a. Used in perfect sentences:
  • I have been following you for a mile.
  • We have done a lot so far.
  • She had been queen of the town.

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