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auxiliary verb

Definitions of auxiliary verb
  1. noun
    a verb that combines with another verb in a verb phrase to help form tense, mood, voice, or condition of the verb it combines with
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    types:
    modal, modal auxiliary, modal auxiliary verb, modal verb
    an auxiliary verb (such as `can' or `will') that is used to express modality
    type of:
    verb
    the word class that serves as the predicate of a sentence
Word Family
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