Auxiliary Verb Do

Posted by Manjusha. Filed in English Grammar

Do has three main uses.

As an Auxiliary Verb

The auxiliary do is used to make emphatic, interrogative and negative verb forms. It is followed by an infinitive without to.

Note that we use do to make questions and negatives with ordinary verbs, but not with other auxiliary verbs.

To make imperative sentences

Do can be used with be to make imperative sentences.

As an ordinary verb

Do is also an ordinary verb. The ordinary verb do can refer to almost any kind of activity.

The auxiliary do and ordinary do can sometimes occur together.

Note that the ordinary do has infinitives (to do, to be done) and participles (doing, done).

Do - Other uses

Do can be used to avoid repeating a verb or a verb phrase.


Sections in this article

Primary Auxiliaries
Be as an ordinary verb
Be as an auxiliary verb
Be: structures
Have: structures
Modal Auxiliary Verbs