Auxiliary Verbs 'Be,' 'Do,' 'Have' An auxiliary verb helps the main (full) 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. • I think I should study harder to master English. • I am having a cup of coffee. Dr Mario Rx Wad S. • You have been practicing hard.
• It was written by a petitioner. • You may choose what you like. The verb forms of be, do, and have can be used either as a main (full) verb or an auxiliary verb.
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