major form class - any of the parts of speech of traditional grammar

infinitive - the uninflected form of the verb

participial, participle - a non-finite form of the verb; in English it is used adjectivally and to form compound tenses

phrasal verb - an English verb followed by one or more particles where the combination behaves as a syntactic and semantic unit; "`turn out' is a phrasal verb in the question `how many turned out to vote?'"

transitive verb, transitive verb form - a verb (or verb construction) that requires an object in order to be grammatical

intransitive verb, intransitive verb form - a verb (or verb construction) that does not take an object

conjugation - the inflection of verbs

content word, open-class word - a word to which an independent meaning can be assigned

reflexive verb - a verb whose agent performs an action that is directed at the agent; "the sentence `he washed' has a reflexive verb"; "`perjure' is a reflexive verb because you cannot perjure anyone but yourself"

copula, copulative, linking verb - an equating verb (such as `be' or `become') that links the subject with the complement of a sentence