More about Auxiliary verbs Definition: auxiliary verbs are those verbs which support the main verb to form the structure of the sentence and give us information about the time of an action . Helping verbs are those verbs which are used to help the main verb in a sentence by extending the meaning of the verb. Helping verbs are also called auxiliary verbs. Basically, helping verbs have no meaning on their own. They are necessary for the grammatical structure of a sentence. Helping verbs are used with main verbs. Basically, there 23 helping verbs in English, they are: is, are, am, was, were, been, being, can, could, may, might, has, shall, will, do, does, did, have, should, must, would, and, had. They are used to convey, expectation, permission, probability, potential, obligation, and direction etc. by: Ebadullah