Assertion: verb's meaning | /r/HasProperty | functional
Facets:
Source sentences:
text: An auxiliary verb (abbreviated aux) is a verb that adds functional or grammatical meaning to the clause in which it appears, so as to express tense, aspect, modality, voice, emphasis, etc.
text: If an auxiliary verb is present (as in trees b and d), it is included in the main predicate because like the light verb, it contributes functional meaning only.