1 非谓语动词之“动词不定式”详解非谓语动词就是不充当谓语的动词，分两种。一是动词不定式。二是动词ing 形式。一、动词不定式1） 作主语To learn English well is not easy. 或It is not easy to learn English well. [说明 ]动词不定式作主语时，往往用it 作形式主语，这种句型可归纳为下面的句型：e.g. It is + adj.+ 动词不定式如果要说明不定式表示的动作执行者，可以用for+sb. e.g. It is + adj.+ for sb.to do sth. 2）作表语（表语用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、 动词的 -ing 形式、不定式、从句来充当， 它常位于系动词 （be, become, appear, seem, look, sound, feel, get, smell 等词）之后。 ）e.g. My wish is to become a teacher. 3）作宾语或者宾语补足语e.g. Most of us like to watch football matches. e.g. He told me to be here on time. 4）作定语： e.g. I have nothing to say about that thing. 5）作状语： e.g. He stopped to have a look. [说明 ] 动词不定式的否定形式：not + to + 动词原形构成e.g. He asked me not to make such a mistake. 2、动词不定式与疑问词连用：疑问词 who, what, which 和疑问副词when, where, how, why 等后面可以按动词不定式，构成动词不定式短语。e.g. (1) He doesn’t know how to use the machine. (2) How to use the machine is a question. (3) The question is when to go there. 3、省去了to 的动词不定式1）let, have, make+do 2）感官动词see, watch, look at, notice, hear, listen to, smell, feel, find +to。注意： 在被动语态中则to 不能省掉。e.g. I saw him dance. =He was seen to dance. e.g. The boss made them work the whole night.=They were made to work the whole night. 3）would rather ，had better + do 4、动词不定式的特殊句型：1）too ⋯to⋯+to do： e.g. He is too excited to speak. 2）enough to do ：e.g. The child is old enough to go to school. 3）Why not +do e.g. Why not take a holiday? 4）so as (not) to do: 表示目的e...
