to后面的动词往往可以省略的，什么时候不可以省略

动词不定式在什么时候省略to~

在感官动词和使役动词后不定式要省略to.例如：see.hear.look.listen.watch,make,let.have有些动词后面的不定式to可省略也可以不省略，比如：help

to后面动词的省略用法的？
如：used
to放在句末时，假如后面是be动词的话，be动词不能省去。如果是do的话能省去吗？等等动词。。。
像此种用法，我记不清楚了，麻烦高手帮忙归纳下to后面动词的省略情况或者说to后面的哪些是能省去的？问题补充：
上面的表达不知道大家看懂没有我的意思是，就好像ought
to
后面再接动词的话那些可以省去哪些不能省去
好像be和have放在to后面是不能省去，我需要to后面动词不能省去的常见情况
答：这个问题实际上是不定式的省略，指为避免重复，在有上文的情况下，只保留不定式符号to,而省略不定式后面的部分。
动词不定式的省略及其符号to的保留
　　1.
Would
you
like
to
go
to
the
cinema
with
us?
　　Yes,
______.
What
time
are
we
going
to
meet?
　　A.
I
would
B.
I
would
like
C.
I
like
to
D.
I'd
like
to
(浙江省)
　　2.
Would
you
like
to
go
for
a
picnic
with
us?
　　______.
What
time
are
we
going
to
meet?
　　A.
No,
I
can't
B.
Yes,
I'm
glad　C.
Yes,
I'd
love
to
D.
I'd
like
(大连市)
　　Keys：
1.
D
2.
C
　　［简析］在口语中，动词不定式中的动词或短语动词在上下文中重复出现时，第二个动词不定式可以省略，但是to不可省略。这种用法常见于＂be
glad
to＂，＂would
like
(love)
to＂，＂have
to＂等结构中。

动词不定式中的省略现象可分为两种情况，一是动词不定式符号to后的动词部分的省略；二是动词不定式符号to的省略。

一、省略动词不定式符号to后的动词部分的情况

1.一些表示心理活动、情感态度的动词或短语，如expect \want \hope \wish \love \hate \decide \plan \mean \try \would like \be ready \be afraid \be glad等后，动词不定式省略to后面的动词部分，但保留to。例如：

(1)-I 'll be away on a business trip.Would you mind looking after my dog ?

-Not at all .I 'd be g l ad to.

(2)-Will you go with me ?

-Well ,I 'd like to.

(3)-Will you go home tomorrow?

-No.I 'm going to a lecture，or at least I am planning to.

2.不定式作宾语补足语时，省略to后的动词部分，即用to代替整个不定式。例如：

(1)The boy wanted to ride his bicycle in the street?but his mot her told him not to.

(2)You'd better finish the job on time if he ordered you to.

3.在一些情态动词或助动词ought to \have to \used to \be able to后。例如：

(1)-Must I go now?

-No.You don 't have to.

(2)-Are you planning to see your grandfather ?

-No.But I ought to.

二、省略动词不定式符号to的情况

1.动词不定式作感官动词feel \see \notice \watch \find \hear \listen to \observe和使役动词have \make \let等的宾语补足语时，动词不定式符号to省略。如果这些动词用于被动语态，其后的动词不定式符号to不能省略(但let除外)。例如：

(1)We often hear him sing the song at home .

(＝He is often heard to sing the song at home.)

(2)The y knew her very well.They had seen her grow up from childhood.

(＝They knew her very well.She was seen to grow up from childhood.)

注意：

get作"使、让、叫某人做某事"时，要用g e t s b.to do s t h.结构。例如：

Mot her got Tom to buy a pack of sugar.

2.两个或两个以上的动词不定式由连词and \or \than \but连接时，从第二个不定式起，往往省略不定式符号to。但如果强调对比之意时不省略。例如：

(1)She 'd like to take off her coat and have a break.

(2)The students are taught to read,write and do many other things.

(3)I t 's more difficult to do than to say .(强调语意前后对比)

(4)The teacher came not to punish you but to help you.(强调语意前后对比)

(5)I wondered whether to study or to work.(强调语意前后对比)

3.不定式作表语，用来解释主语或主语从句中do的精确含义时，往往可以省略动词不定式符号to。例如：

(1)The first things he did was go up to her trainer and thank her for all her help during her training.

(2)What we want to do now is lie down and rest.

(3)What a dictionary does is help the students to find out the meaning and the usage of new words .

4.在why或why not引起的表示建议或责问的省略问句中。例如：

(1)Why get so excited?

(2)Why quarrel with your mother?

(3)Why not join us,Tom?

5.在一些类似情态动词词组had better \would rather \had best \rather than \can't but \can't help but等之后。例如：

(1)In China it is important to invest in education rather than in crease personal wages.

(2)Jack would r at her read than talk.

(3)You'd better put on more clothes,or you'll catch a bad cold.

(4)She dares to go to the lonely is land by her self.I can 't but admire her bravery.

6.在美国口语中，用在祈使语气中表示目的的动词come \go \try \run之后的动词不定式符号to可省略，也可不省略。例如：

(1)Come tell me if he arrives.

(2)Go tell your mot her.

(3)Run swim together.

(4)Try open the door again.

(5)Try to open the door again.(不省略语气更强烈)

7.在一些固定短语中，make believe(假装)make do(凑合、设法对付)let slip(说出)leave go(放手)hear say(听说)let pass(忽略)let be(别打扰)。例如：

(1)The teacher didn 't let slip a word to us about the coming exam.

(2)I 've heard say that Mary was about to come .

(3)The boy made believe that he was reading when his father entered .

(4)Let him be.

(5)Don 't leave go(of)the fish.

另外值得注意的几种情况：

1.need作行为动词时，后面接带to的动词不定式；当dare作情态动词时，一般不用于肯定陈述句中；当dare作行为动词时，其后既可接带to的动词不定式，也可接不带to的动词不定式。例如：

(1)I dare to swim across the river.

(2)He dares to say that to his father.

(3)She doesn 't dare(to)answer her teacher 's question.

(4)We need to finish the job before lunch.

2.关于动词help后接动词不定式的问题：一般说来，help后既可接带to的动词不定式，也可接不带to的动词不定式(在美国英语及非正式文体中多见不带to)。例如：

(1)Would you like to help me(to)carry the luggage?

(2)Help the baby(to)get up，Su-san!

3.but \besides \except作介词，后接动词不定式的情况：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，反之则要带to。例如：

(1)She could do nothing but cry .

(2)What do you like to do besides swim?

(3)He has no choice but to leave.

4.当like或want在由when \whenever \what \whatever \as \if等引导的状语从句中时，其后往往省略整个动词不定式。例如：

(1)Come whenever you like .

(2)Tom，don 't be nervous.Take whatever you want!

(3)Do anything as you like.

(4)You don 't have to come swimming if you don 't want.

(文/江苏盱眙县中学骈晓胡国梅；英语通高三版2003学年第11期；版权归英语辅导报社所有，独家网络合作伙伴新浪教育，未经许可，不得以任何形式进行转载。)

六、 不定式符号to后的动词部分的省略
○1一些表示心理活动、情感态度的动词或短语，如expect, want, hope, wish, love, hate, decide, plan, mean, try, would like, be ready, be afraid, be glad…后动词不定式省略to后面的动词部分，但保留to。
e.g.: ----Will you go with me? ----Well, I’d like to.
----Will you go home tomorrow? ---- No. I’m going to listen to a lecture, or at least I am planning to.

○2不定式作宾补时，省略to后的动词部分，即用to代替整个不定式。
e.g.: They wanted to go outing on Sunday. But their teacher asked them not to.
You’d better finish the job on time if he ordered you to.

○3在一些情态动词或助动词ought to, have to, used to, be able to后
e.g.: ----Must I go now? ----No. You don’t have to.
-----Are you planning to see your grandfather? ----No. But I ought to.

○4当不定式是由be, have, have been构成时，to后必须保留be, have, have been.
e.g.: ----Are you fond of classic music? ----No, but I use to be.
----Have you told Ann about her failure in the test? ----Yes, but I oughtn’t to have.

○5部分动词常接 “to be + 形容词、名词短语”等形式，有时to be可省略。如believe, consider, discover, find, feel, imagine, judge, know, prove, think, suppose, see, understand….
e.g.: We all believe John (to be) honest.
I consider him (to be) one of the best biology teachers of No.3 Middle School.
★当不定式是完成式时，to不能省略。 e.g.: We consider him to have been foolish.我们认为他已经傻了。

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