The auxiliary verb helps the main 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.,

Study the following examples.

• You should work hard in mathematics.

• I am having my breakfast now.

• They have been asking questions since Monday.

• The letter was written by Maria.

• You may go home if you feel sick.

• You must come today!

In the above sentences, the underlined words are auxiliary verbs or helping verbs.

Auxiliary verb are of two types:

1. Modal verbs

2. non modal Verbs

Non-Modal Verbs	Modal Verbs
Is, has, does , are, have, do, am, had, did, was, were	Can, could, must, will, would, may, been, shall, should, might, being,will, would, may, been.