语法专项提升非谓语动词动词不定式 不定式动词在介词 but,except,besides 后面时,若这些介词前有实义动词 do 的各种形式,则后接不带 to 的不定式,否则带 to。•在 cannot but,cannot choose but,cannot help but 之后接不带 to 的不定式。•I have no choice but to wait.我除了等别无选择。•I can’t do anything but go out with her.•我除了和她一起出去什么也不能做。•I could not but admit that he was right and I was wrong.•我不得不承认他对了,我错了。•I cannot help but wait for him.我不得不等他。•I cannot choose but tell him the truth.•我不得不告诉他真相。•不定式作状语• (1)不定式作状语,其逻辑主语与句子的主语必须一致。•To learn English well,he needs a good dictionary.•为了学好英语,他需要一本好词典。 (而不能说:To learn English well,a good dictionary is needed.)•(2)有些不定式短语可以作独立成分,通常位于句首,有时位于句中或句尾,需要用逗号同其他句子成分隔开。•To be honest,I know nothing about it.•说实话,我对那件事一无所知。•常见的这类短语有:to tell the truth,to be frank (坦率地说),to be exact,to begin with。•(3)不定式作结果状语时,常表示一种意外的结果,尤其是和 only 连用时,常用 only to find。•He ran to the station only to find the train had left.•他跑到火车站却发现火车已开走。•不定式的主动形式表示被动意义•(1)不定式作定语与被修饰名词或代词构成动宾关系,并且不定式的逻辑主语就是句子的主语。用心 爱心 专心1•I have something important to do.我有要事要做。•注意:当不定式的逻辑主语不是句子的主语时,动词不定式常用被动形式。•I’m going to the market.Do you have anything to be bought?•我要去市场,你有东西让我替你买吗?•(2)某些动词的不定式可以与 be 连用,常见的有 to blame,to see,to let 等。•In the accident,the car driver was to blame.•在这次事故中,轿车司机应受责备。• 分 词 •分词的时态和语态分词 时态语态意义例句主动被动现在分词一般式doingbeingdone分词动作和主句谓语动作同时发生Being poor,he couldn’t go to scho...