不定式作名词修饰语分为前置和后置两种,下面将分别对这两种情况进行讨论.一、前置.单个不定式一般不能够作前置修饰语,但不定式分句在某些情况下可以前置.1、带to不定式的被动态可置于否定词或别的副词之后与它们一起作前置修饰语;主动态有时也可以与形容词(常是一些表示难易及愉快与否的词)和副词一起作前置修饰语.在英国英语中它们之间须用连字号,在美国英语中有不用的趋向: Infinitives as a noun modifier is divided into pre-and post-two, the following will be discussed separately for these two situations.First, a single infinitive can not generally be used as pre-modifier, but the infinitive clause in In some cases, you can prepend.1, with to be infinitive, can be placed in front of the negative or other adverbs with the adverb; preconditions can sometimes be associated with adjectives And pleasant words) and adverbs together as a pre-modifier in British English in the use of hyphens between them, there is a tendency in American English: