高中英语语法：动词不定式的省略

　　高中英语语法：动词不定式的省略

　　①使役动词和感觉动词后不定式作宾补时，省略不定式符号to。

　　②不定式与前面的动词重复时，常被省略，但要保留to。

　　1、使役动词let, make, have及感觉动词see, watch, hear, notice, observe feel, witness等后面作宾语补足语的不定式要省去，但用于被动语态时不能省略。

　　例如：I saw the boy fall from the tree. The boy was seen to fall from the tree.

　　2、有时为了避免重复，表达相同意思的不定式to符号后面的内容常承前省略，只保留不定式符号to。

　　①系动词(be) + adj. 此类用法中常见的形容词有：afraid, ready, glad, happy, willing等。例如：

　　-Could you go shopping with me?

　　-I am glad to.(省略了go shopping with you)

　　②mean, try, want, afford, decide, refuse, wish, like, need, would like, would love等后面接不定式作宾语时，省略作宾语的不定式，只保留不定式符号to。

　　-Are you going there? -Yes, Id like to. (省略了going there)

　　【注意】若该宾语是be动词或完成时态的不定式时，则须在to后面保留be或have。例如：

　　-Are you an engineer? -No, but I want to be. (be不能省略)

　　③tell, warn, order, advise, ask, expect等动词后不定式作宾补时，常省略不定式的内容，只保留不定式符号to。例如：

　　The students want to enter the lab, but the monitor advises them not to.

　　Nothing can stop the boy from playing video games when he wants to.

　　④两个或两个以上的动词不定式由并列连词连接时，后面的不定式可省去to。若表示对比、对照时，则不省略to。

　　Her job is to take care of the children and (to) wash clothes.

　　Its better to laugh than to cry.

　　3、特殊结构中的省略

　　would rather, had better, would sooner, do nothing but, have nothing to do but, there is nothing to do but, cant help but, rather than等后不定式符号常省略。

　　例如：He would sooner die than surrender.

　　Id rather look after the baby than wash dishes.