American Heritage® Dictionary of the English Language, Fourth Edition
- n. A verb, such as have, can, or will, that accompanies the main verb in a clause and helps to make distinctions in mood, voice, aspect, and tense.
- n. grammar A verb that accompanies the main verb in a clause in order to make distinctions in tense, mood, voice or aspect.
- n. 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
“And President Bush made official the growing use of this semimodal auxiliary verb with his answer in a news conference: “Anybody who harbors terrorists needs to fear the United States.””
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