An auxiliary verb, also known as a helping verb, is a verb that is used together with a main verb to form a verb phrase. Auxiliary verbs provide additional information about tense, mood, voice, or aspect. Common auxiliary verbs in English include "be," "have," and "do." For example, in the sentence "She is running," the auxiliary verb "is" helps to indicate the continuous tense of the main verb "running." Auxiliary verbs are important for constructing various grammatical structures, allowing for clearer expression of time and the nature of actions in sentences.

What is an "auxiliary verb"?

“auxiliary verb”的英语定义和含义

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