Auxiliary Verbs Definition

Auxiliary Verbs are is, am, are, was, were, have, has, had, having, can, could, shall, should, will, would, may, might, must, dare, need, used to, ought to, etc.

Auxiliary Verbs Definition

Auxiliary Verbs are verbs that merely help principal verbs in the formation of various verb forms. Auxiliary verbs are important as structural verbs.

The negative is formed by putting not after auxiliary. Examples: I can not, I may not, I must not.
The interrogative is formed by inverting the subject and verb. Examples: Can I? May I? Must I?

Auxiliary Verbs or helping verbs are of two types:

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Primary Auxiliary Verbs	Be Verb: is, am, are, was, were, been, being Have Verb: have, has, had, having Do Verb: do, does, did
Modal Auxiliary Verbs	can, could, shall, should, will, would, may, might, must, dare, need, used to, ought to

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