Helping verbs, also known as auxiliary verbs, are used in combination with main verbs to express shades of time and mood. They "help" the main verb by adding meaning to the sentence. Common helping verbs include is, am, are, was, were, have, has, had, do, does, did, can, could, may, might, must, shall, will, and should.
When identifying helping verbs, look for words that come before the main verb in a sentence. Consider the following questions:
Practice identifying helping verbs in sentences and consider their role in expressing time and mood.