文档介绍：非谓语动词 
在句子中充当除谓语以外的各种句子成分的动词形式叫做非谓语动词。非谓语动词与谓语动词是相对的概念。动词的非谓语形式有三种:不定式、动名词和分词, 可以充当主语、宾语、状语等.
 
 不定式由“ to十动词原形”构成,其否定形式是“ not to do”.不定式可以带宾语或状语构成不定式短语,没有人称和数的变化,、宾语、状语、表语和定语,“ for十名词或代词宾格”构成.
    :
    l) ,往往放在谓语之后,用 :
    To see is to believe.
    It is right to give up smoking. 
    2) ,如果还带有宾语补足语。往往把不定式放在宾语补足语之后,而用 :
    He wanted to go.
    I find it interesting to study work with him.
    3) :
    He asked me to do the work with him.
 注意:在 feel,hear,listen to,look at,notice, observe,see,watch,have,let,make等词后的补足语中,不定式不带 ,就必须带
    I often hear him sing the song.
    He is often heard to sing the song.
    注意:不定式动词在介词 but,except,besides后面时,如果这些介词之前有行为动词 do的各种形式,那么,这些介词后的不定式不带 to,否则要带 :
    She could do nothing but cry.
    What do you like to do besides swim?
    I have no choice but to go.
4):
    I have some books for you to read.   
注①作定语的不定式如果是不及物动词,或者不定式所修饰的名词或代词是不定式动作的地点、工具等,:
    He is looking for a room to live in.
    There is nothing to worry about.
    Please give me a knife to cut with.
    注②当作定语的不定式所修饰的名词或代词是不定式动作的承受者时,不定式既可以用主动语态,也可用被动语态,:
    A) Have you anything to send? 你有什么东西要寄吗?(不走式 to send的动作执行者是 you)
    B) Have you anything to be sent?你有什么要(我或别人)寄的东西吗?(不定式