Grammar Index : 2A verb which helps another verb to form its tense, voice or mood is called an Auxiliary verb.Have, be (am, is, are, was and were) and do are usually used as auxiliary verbs. They can be used as Main verbs as well. Examples: I have few urgent works. (Main)They have done very well in the examinations. (Auxiliary)God is in Heaven. (Main)He is liked by all. (Auxiliary)The man does his work quietly. (Main)Did he come here? (Auxiliary)They were in London. (Main)They were disliked by their friends. (Auxiliary)Where are you? (Main)You are called by your father. (Auxiliary)Am, is, was, are, were, do, did, have, has, had, will, would, can, could, shall, should, may, might and must are auxiliary verbs. Ought to, dare, need and used to are called semi modal auxiliary verbs.