View source for Auxiliary verb

An '''auxiliary verb''' is a [[verb]] that combines with a non-finite form (e.g., a [[participle]] or [[infinitive]]) of another verb.  The auxiliary verb expresses such things as [[tense]], [[mood (grammar)|mood]], [[voice]], and [[aspect (grammar)|aspect]], while the other verb provides the lexical meaning.  For example, in "I had been walking," "had" is an auxiliary verb indicating the tense, "been" is an auxiliary verb indicating the aspect, and "walking" is a participle of a lexical verb identifying the action.
==References==
*[http://englishplus.com/grammar/00000319.htm Auxiliary Verb]
[[Category:Grammar]]