一、不定式符号to的省略形式

1、在疑问副词why或why not后常直接用不带to的不定式构成问句。如:Why not try again?为什么不再试一下?

2、在某些介词后可以接不带to的不定式形式。

1)在“can’t but...不得不,只好”之后。

I can not but admire his courage。我不得不佩服他的勇气。

2)在“can but...只能,大不了”之后I can but lose that money。我大不了丢掉那笔钱。

3)在“do nothing but(or.except)...,there be sth.to do but(or except)...,sb.have sth.to do but”等结构中,介词,but(or except)后用不带to的动词不定形式。

He did nothing at the meeting but smoke.他在会上什么也没干只是吸烟。

I have nothing to do except copy the artecle for hi m.我只好给他抄写这篇文章。

3、在固定句式结构中的副词后接不带to的不定式。

1) had better/had best最好You'd better tell her about it.你最好把这件事告诉她。

2) would rather(not)...宁可(不);宁愿(不)=would sooner(not )...I would rather not tell you.我宁可不告诉你。

此句型也可以扩展成:would rather...than...=would...rather tha n...或would sooner...than宁可......也不......。如:He would rat her die than give in to the enemy.他宁死也不向敌人屈服。

4、在祈使语气(或口语)中,在动词come,go,run后接不定式作目的状语可省略不定式符号to,这一点在美国英语中常见,其用法常见于祈使句。如:Go see what's going to outside.去看看外边发生了什么事。

5、一般在助动词或情态动词如:do,will,shall,would,should,can,may,m ust等后面接不带to的动词不定式。如:Do you still remember what your tea cher told you the other day?你还记得前两天你们老师跟你讲的事吗?

6、在视觉性动词see,watch,notice,observe,note等,听觉性动词hear,使役性动词make,let,have,感性动词feel等动词后接不定式作复合宾语时,不定式不带to,但省略to的不式作主语补主语时,则需加上to,这时不能省略不定式符号to。如:Suddenly we felt the at mosphere grow tense.突然我们感到气氛变得紧张起来。

He was made to do it again.他被迫再做一遍。

7、并的两个或多个带to的不定式由并列式连词and或or连接在一起,在句中作表语、宾语、或状语等时,第二个及其后的不定式符号可省略。如:She told her child to stay there and w ait till she came back.她告诉好的孩子呆在那儿一直等到她回来。

8、在词组look at和listen to后的“宾语+不定式”结构中也用不带to的不定式形式。在美国英语中常见。如:She listened to the rain patter on the window-p anes.她倾听着雨水敲打着玻璃窗。