Auxiliary Verbs
Auxiliary verbs (also called helping verbs) work with main verbs to show tense, aspect, or voice. They're the helpers that give your sentences more precise meaning about when and how actions happen.
Common auxiliary verbs include forms of "be" (am, is, are, was, were), "have" (has, had), "do" (does, did), and modal auxiliaries like "can," "could," "will," "would," "shall," "should," "may," "might," and "must."
A sentence can contain up to three auxiliary verbs working together with the main verb. For example, in "We will be going to dinner tonight," "will" and "be" are auxiliary verbs helping "going."
Remember This: In questions, the auxiliary verb often separates from the main verb. For example: "Are you coming?" instead of "You are coming."