动词不定式指通常由to加上动词原形(“to+动词原形”)所构成的一种非限定性动词形式,但在有些情况下to可以省略。动词不定式有进行体和完成体(如to be writing,to have written),也有被动态(如to be written),在句中可起到作名词、形容词或副词的作用。动词不定式在语法功能上可作主语、宾语、表语、定语、状语和宾语补足语等,动词不 Verb infinitive refers to a non-limiting form of verbs usually composed of to plus verb prototypes ( “to + verb prototypes”), but in some cases to can be omitted. Infinitive infinitives have body and body (such as to be writing, to have written), there are also dynamic (such as to be written), in the sentence can play the role of nouns, adjectives or adverbs. Verb infinitives can function as grammatical subject, object, table language, attribute, adverbial and object complement language, the verb not