动词不定式专题复习
动词不定式的形式：
动词不定式的用法
1.不定式作主语
⑴原则上，可用动词不定式直接作句子的主语，通常用it作句子的形式主语，而把不定式移到后面，形成“It + 谓语… + 动词不定式…”的句型。如：
To catch the 5：00 bus early in the morning is not a good idea.
It is not a good idea to catch the 5：00 bus early in the morning.
To learn a foreign language well takes painstaking efforts.
It takes painstaking efforts to learn a foreign language well.
⑵若要说明不定式的动作的执行者，可以在不定式前面加上“for + 名词或代词”结构，或是“of + 名词或代词”结构。
It is a great pleasure for me to talk with him. It is very kind of you to help me .
⑶可用于“of + 名词/代词 + 动词不定式”结构中作主语补足语的形容词是指那些可以表示人或事物的性质或品质的好坏的形容词。这些词如：careful， cruel， foolish， bold， brave， good， honest， kind， rude，polite， nice，stupid， selfish， silly， wicked， wise， thoughtful， wrong等。
2.不定式作宾语
不定式作宾语有两种情况：一是及物动词后直接跟带to的不定式，二是“动词+疑问词+带to的不定式”。
⑴“动词+带to的不定式”结构：常见的以不定式作宾语的动词有afford， appear， agree， ask， believe，decide， demand， desire， fail， hope， intend，learn， mean， offer， promise，refuse， wish等。如：
I can‘t afford to buy a house.
⑵“动词+疑问代（副）词+不定式”结构：常见的这类动词有advise， decide， forget， know， learn， remember，see， tell， think， teach， wonder，discover， understand， guess， explain等。这类疑问代（副）词what， when， which， where， how， whether等（不包含why）。如：
She does not know how to go there. He will tell you how to deal with it.
⑶在不定式作宾语时，有时我们会使用it作形式宾语，而把不定式放到后面。如：
They consider it inappropriate to have classes in the evening.
（4）可以作形容词的宾语。这一类形容词有glad, sorry, afraid, pleased, determined, willing, eager, anxious等。例如：
I”m determined to give up smoking.
He is willing to help us.
（5）在tell, advise, allow, forbid, learn, show, decide等词的后面常用“连接词+不定式”作宾语。例如：
We must decide whether to go or stay.
I don”t know how to get in touch with him.
不定式作表语时，主语通常是一个名词，不定式短语或者从句。
The boss‘s plan is to start building the skyscraper immediately. To work means to earn a living. What you have to do is to push the button.
4.不定式作定语
不定式作定语相当于一个定语从句，它修饰以下几类名词：
⑴由动词派生或转化而来的名词，它们所对应的动词通常有不定式作宾语。这类名词主要有：attempt， claim，decision， plan， promise， intention， need，resolution，tendency， wish， failure， threat等。
Another attempt to climb the mountain will be made next month.
In his speech he expressed his determination to achieve the goal.
⑵由可能与不定式搭配的形容词派生出来的名词。这类名词主要有：anxiety， patience， ability，willingness， ambition等。
Her eagerness to learn a foreign language obvious.
⑶不定式作定语还可用来修饰代词something， anything， everything， nothing.不定式做后置定语。
Do you have anything to send? 你有什么东西要寄吗？（不定式to send的动作执行者是you）
Do you have anything to be sent? 你有什么要（我或别人）寄的东西吗？不定式to be sent的动作执行者是已被省略的me或someone else）
She has everything to lose and nothing to gain.
⑷由only， last， next，序数词或形容词最高级修饰的名词后常用不定式作定语。
Jim is the only student to answer the question correctly in his class.
You are the last to undertake the blood test.
⑸不定式常作为定语修饰there be结构的真实主语。在there be结构中，用来修饰主语的不定式有时用主动形式，有时用被动形式。当说话人考虑的是必须有人完成某件事时，不定式用主动形式。如果说话人强调的是事情本身必须被完成时，不定式则用被动形式。例如：
There is a lot of work to do.（Somebody has to do the work.）
There is a lot of work to be done.（The work has to be done.）
⑹有些抽象名词。主要有：reason， right， time， effort， chance， way等。如： the time to go to school， the way to get to the clinic， the chance to win the game.
(7)如果不定式中的动词是不及物动词,则不定式中要有介词.
I have something to say.
He has a lot of homework to do .
He is looking for a room to live in .
There is nothing to worry about.
不定式所修饰的名词或代词是不定式动作的地点工具等，即使是及物动词，不定式后面仍须有相应的介词。Please give me a pen to write with.
不定式所修饰的名词如果是time, place或way，不定式后面的介词习惯上要省去。
He had no money and no place to live. 他没钱没地方住。
(8)不定式作定语时，应放在被修饰词的后面，而且放在其他后置定语之后。不定式做定语与所修饰的词之间有三种关系：
1)动宾关系 I have a lot of work to do.我有很多工作要做。
2)主谓关系 He is always the first to come.他总是第一个来。
3)同位关系 We all have a chance to go to college. 我们都有上大学的机会。
不定式作状语相当于一个状语从句，表示形为的目的、结果或原因。
⑴表示目的。在这种情况下，不定式的逻辑主语通常也是全句的主语。
He stayed there to see what would happen.
在强调不定式目的状语时，不定式前可加in order， so as等。如：
She asked me to drive her to the airport in order to catch the 5：00 plane.
He moved the TV set to the meeting-room so as to let everyone watch it.
⑵用so……as to……， such（……）as to……， enough to……， too……to， only to等表示结果，如：
Have you got enough room to seat all of us？
She is too weak to join us in the outing.
⑶将不定式移到句首表示条件，如：
To hear the teacher better， you have to sit in the front. = If you are to hear the teacher better，……
⑷与形容词连用时，大多表示原因。这些形容词主要有：happy， kind， surprised， frightened， angry，shocked， glad， delighted， grieved，disappointed等。
They were surprised to be informed of the news. I‘m glad to hear this.
6.独立结构
To tell the truth, I don’t agree with you.
?to be frank,
?to be honest,
?to tell the truth
7.关于小品词to
(1).不定式中的动词上文已出现过,下文要省略该动词.
eg: Would you like to go with me ? I’d like to .
(2). 不定式是to be 结构, be 不可省.
eg: Would you like to be a teacher? I’d li ke to be.
?不定式与疑问词who,which, when, how, what 等连用，在句中起名词作用，可充当主语、表语、宾语等。
He didn’t know what to say.他不知道说什么。(宾语)
How to solve the problem is very important.如何解决这个问题很重要。(主语) My question is when to start.我的问题是什么时候开始。(表语)
?在与why连用时，只用于why或why not开头的简短疑问句中，后面紧跟的动词不定式不带to。
Why not have a rest?
8.固定句型:
?had better/had best + (not) do sth.最好（不）做某事
?Why (not) do sth.?
?…prefer to do/prefer doing
?…prefer + n./doing A +to + n./doing B
?…prefer + to do A rather than (to) do B
?…would rather (not) do sth.
?…would rather do A than (do) B
?…would rather + 句子（过去式）（虚拟语气）要做……
动词不定式的时态和语态
一般式 to do to be done
完成式 to have done to have been done
进行式 to be doing
完成进行式 to have been doing
1.如果不定式所表示的动作与主要谓语动词所表示的动作同时（或几乎同时）发生或发生在主要谓语之后，
通常用不定式的一般形式。如：
I saw him go out.
I‘m glad to see you.
2.如果不定式所表示的动作发生在主要谓语动词或特定的时间之前，不定式就要用完成式。如：
I intended to have telephoned you， but I forgot to.
I should like to have bought a dictionary.
3.不定式进行式表示主要谓语动词所表示的动作发生时，不定式所表示的动作正在发生。如：
I am glad to be talking with you. She pretended to be listening attentively.
4.不定式完成进行时表示的是一个开始于过去某一时刻但一直延续到谓语动词发生的那一时刻的动作。如：
He was thought to have been working on the project for two years.
5.不定式的被动语态
当不定式的逻辑主语是动作的承受者时，这个不定式要用被动式，包括它的各种时态在内。如：
She doesn‘t like to be treated as a guest.
她不喜欢被当作客人对待。
They want their TV set to be fixed right now.
他们想把电视机马上修好。
There are a lot of things to be done.
有许多事要做。
This is the text to be read next time.
下次就读这篇课文。
注意：有些习惯用法中，只能用主动语态。如：
The house is to let.
这房子要出租。
A lot of work still remains to do.
许多工作有待去做。
(1).They pretended not to see us.(一般式表示与谓语的动作同时/几乎/发生在它之后.)
(2). He pretended to be sleeping. (在谓语动词发生的同时,不定式的动作也正在进行)
(3).She pretended to have known it before.(完成式表示动作发生在谓语动作之前)
(4).We’re happy to have been working with you.(完成进行式表示谓语动作发生之前,不定式的动作一直在进行而且可能之后也继续)
不带to 的不定式
1.表示感觉的动词
五看see，notice，watch，observe，look at 三使have，let，make 二听hear，listen to 一感觉feel He noticed the man enter the room. 他注意到有人进屋了。
They observed her do the experiment. 他们观察她做实验了。
2.help后的不定式可以带to也可以不带to.
Can you help me （to） clean up after the meal？饭后你能帮我洗碗吗？
3.有些类似于情态动词的词语（如rather than， had better， would rather， might as well等）之后，不
定式不带to.如：
We might as well go without him. 我们可以不让他跟去。
You‘d better go now. 你最好现在走。
4.不定式用在介词but, except, besides后时,如果这些介词前有行为动词do的各种形式,那么介词后的不定式
不带to,相反则带to.
(1). She could do nothing but cry.
(2). I have no choice but to go.
(3).What do you like to do besides sleep
动词不定式用法归纳
动词不定式没有人称和数的变化，在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征，在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外，动词不定式具有动词特点，可以有自己的宾语和状语，组成动词不定式短语。动词不定式的肯定形式是to＋do；其否定形式是not to＋do。
1．作主语
可以直接作主语。如： To see is to believe．
但在英语中，常用it作形式主语，真正的主语即动词不定式放在后面。如：
It's wrong to play tricks on other people．
It's our duty to keep our environment clean and tidy．（Lesson 10）．
点击规律：动词不定式在句中作主语时，常放在It is ＋adj．（形容词）＋to do sth．或 It is ＋n．（名词）＋to do sth．句型中，it仅作形式主语。
2．作宾语
a．以下动词只能to do 作宾语。
attempt企图 enable能够 neglect忽视 afford负担得起 demand要求 long渴望 arrange安排 mean意欲，打算 begin开始 expect期望 appear似乎，显得 determine决定 manage设法 cease停止 hate憎恨，厌恶 pretend假装 ask问 need需要 agree同意 desire愿望 love爱 swear宣誓 volunteer志愿 wish希望 bear承受 endeavor努力 offer提供 beg请求 fail不能 plan计划 bother扰乱；烦恼 forget忘记 prefer喜欢，宁愿 care关心，喜欢 happen碰巧 prepare准备 decide决定 learn学习 regret抱歉，遗憾 choose选择 hesitate犹豫 profess表明 claim要求 hope希望 promise承诺，允许 start开始 undertake承接 want想要 intend想要 refuse拒绝 decide决定 learn学习 contrive设法，图谋 incline有…倾向 propose提议 seek找，寻觅 try试图
b．love，like ，begin，start，hate ，prefer等词后面可以接不定式。
点击规律：上述动词后面除接不定式外，还可以接动名词，意思无很大区别。
提示板：like doing指经常性动作，而like to do指一次性的动作。如：
I like swimming，but I don't like to swim now．我喜欢游泳，但我现在不想游。
c．stop，forget，remember，go on ，try等词或短语后面可以接不定式。
点击规律：上述动词后面接不定式和接动名词意思大不相同。
1）stop to do sth．：停止一件事，去做另一件事。
stop doing sth．：停止正在做的事。
例句：When the teacher came in，the students stopped talking；when he came out，the students stopped to talk．
当老师走进来时，学生们停止说话；当老师走出去时，学生们又开始说话。
2）思考：forget，remember，go on，try等词或短语后面接不定式和动名词用法有何区别？
d．在find／feel＋it＋adj．＋to do sth．句型中，it是形式宾语，真正的宾语是后面的动词不定式。如：
The man downstairs found it difficult to get to sleep．
I feel it easy to recite the text．
点击规律：某些动词或短语后面既可以接动词不定式作宾语，又可接动名词作宾语，二者用法上的区别可以通过造句子加以区分，如上面stop例句。
3．作宾语补足语
a．下面的动词要求不定式做宾补：动词+宾语+动词不定式
ask要求，邀请get请，得到 prompt促使 allow允许 forbid禁止prefer喜欢，宁愿
announce宣布force强迫press迫使 bride 收买 inspire鼓舞request请求assist协助
hate憎恶pronounce断定，表示advise劝告 exhort告诫，勉励 pray请求authorize授权，委托help帮助 recommend劝告，推荐bear容忍implore恳求remind提醒beg请求 induce引诱report报告 compel强迫 invite吸引，邀请summon传唤command命令 intend想要，企图
show 显示drive驱赶mean意欲，打算 train训练 cause引起 instruct指示require要求deserve应受 leave使，让tell告诉direct指导like喜欢 tempt劝诱entitle有资格order命令
warn告诫enable使能够 need需要urge激励，力说 encourage鼓励oblige不得不
want想要 condemn指责，谴责lead引起，使得 teach教 entreat恳求 permit允许 wish希望
I tell him not to go there by bus ．
Edison's mother taught him to read and write．
b．let，make，have，see，hear，feel，watch， notice后面接不带to的不定式作宾补。
如： The boss makes them work 16 hours a day．
I heard her sing in the next room．
提示板：若变成被动语态，在上述结构中，不定式符号to要加上。如：
They are made to work 16 hours a day by the boss．
She was heard to sing in the next room．
4．作定语：放在被修饰的名词、代词后面
例句：I have a lot of work to do．
The doctor said he could do nothing to help the boy．
点击规律：动词不定式若在句中作定语，常放在被修饰的名词、代词之后。
提示板：如果动词不定式和前面所修饰的词构成动宾关系，若动词是不及物动词，切记不要忘掉介词。如：
I have a small bedroom to live in．
Have you got some pens to write with？
5．表语：放在连系动词be后面
例句：His wish is to become a scientist．
The first important thing is to save the soldiers'lives．
当务之急是抢救战士们的生命。
点击规律：动词不定式在句中作表语时，通常对连系动词前面的名词进行诠释说明。
6．作状语
a．目的状语：放在go，come，use，live，in order等词后面。如：
I come to see you．
He runs fast in order to get there in time．
b．原因状语：放在sorry，glad，surprised， disappointed，excited等词后面。如：
I am glad to see you here．
I am sorry to trouble you．
c．作结果状语。如：
Some of the apples are hard to reach．
The room is large enough to hold 1000 people．
7．与what，who，whose，when，where， how等疑问词连用，作宾语、宾语补足语、主语等。如：
I don't know what to do next．（宾语）
He taught us how to use the computer．（宾语补足语）
It's still a question how to get there．（主语）
动词不定式(专项练习及详解)
1. The teacher told them ________ make so much noise.
A. don’t
B. not
C. will not
D. not to
2. Our master often told us _______ things for granted.
A. not to have
B. not to take
C. didn’t tak e
D. not to make
3. Tell him _______ the window.
A. to shut not
B. not to shut
C. to not shut
D. not shut
4. The boy wanted to ride his bicycle in the street, but his mother told him ______.
A. not to
B. not to do
C. not do it
D. do not to
5. Mrs Smith warned her daughter ________ after drinking.
A. never to drive
B. to never drive
C. never driving
D. never drive
6. The patient was warned _______ oily food after the operation.
A. to eat not
B. eating not
C. not to eat
D. not eating
7. The workers want us ________ together with them.
A. work
B. working
C. to work
D. worked
8. They would not allow him ________ across the enemy line.
A. to risk going
B. risking to go
C. for risk to go
D. risk going
9. I saw him _______ out of the room.
A. go
B. had gone
C. has gone
D. goes
10. They knew her very well. They had seen her _______ up from childhood.
A. grow
B. grew
C. was growing
D. to grow
11. I’ve heard him _______ about you oft en.
A. spoke
B. speaks
C. speak
12. Though he had often made his little sister _____, today he was made _____by his little sister.
A. cry；to cry
B. crying；crying
C. cry；cry
D. to cry；cry
13. He was made _________.
A. go
B. gone
C. going
D. to go
14. John was made _______ the truck for a week as a punishment.
A. to wash
B. washing
C. wash
D. to be washing
15. Paul doesn’t have to be made _______. He always works hard.
A. learn
B. to learn
C. learned
D. learning
16. There’re so many kinds of tape-recorders on sale that I can’t make up my mind _____ to buy.
A. what
B. which
C. how
D. where
17. There isn’t any difference between the two. I really don’t know _________.
A. where to choose
B. which to choose
C. to choose what
D. to choose which
18. “ Have you decided when ________?” “ Yes, tomorrow morning.”
A. to leave
B. to be leaving
C. will you leave
D. are you leaving
19. Last summer I took a course on ________.
A. how to make dresses
B. how dresses be made
C. how to be made dresses
D. how dresses to be made
20. He doesn’t know ______ to stay or not.
A. whether
B. if
C. either
D. if he will
21. She pretended _______ me when I passed by.
A. not to see
B. not seeing
C. to not see
D. having not seen
22. --- The light in the office is still on. --- Oh, I forgot _______.
A. turning it off
B. turn it off
C. to turn it off
D. having turned it off
23. We agreed _________ here bu t so far she hasn’t turned up yet.
A. having met
B. meeting
C. to meet
D. to have met
24. Little Jim should love _______ to the theatre this evening.
A. to be taken
B. to take
C. being taken
D. taking
25. I would love ______ to the party last night but I had to work extra hours to finish a report.
A. to go
B. to have gone
C. going
D. having gone
26. Frank is the kind of person who people like to ________.
A. make friend with
B. make friends of
C. make friends
D. make friends with
27. Go on ________ the other exercise after you have finished this one.
A. to do
B. doing
C. with
D. to be doing
28. She reached the top of the hill and stopped _______ on a big rock by the side of the path.
A. to have rested
B. resting
C. to rest
D. rest
29. Tom kept quiet about the accident ________ lose his job.
A. so not as to
B. so as not to
C. so as to not
D. not so as to
30. I need a day or two ________.
A. to think it over
B. to think over
C. of thinking
31. He was too excited _________.
A. speak
B. to speak
C. not to speak
D. speaking
32. Charles Babbage is generally considered ________ the first computer.
A. to invent
B. inventing
C. to have invented
D. having invented
33. He said he would rather not _______ it right now.
A. doing
B. to do
C. do
D. to be doing
34. Rather than _______ on a crowded bus, he always prefers _______ a bicycle.
A. ride；ride
B. riding；ride
C. ride；to ride
D. to ride；riding
35. It’s freezing outside. You _______ put on your overcoat.
A. had better to
B. had better
C. would better
D. would better to
36. The chair looks rather hard, but in fact it is very comfortable to _______.
A. sit
B. sit on
C. be sit
D. be sat on
37. I’m hungry. Get me something _________.
A. eat
B. to eat
C. eating
D. for eating
38. --- I usually go there by train.
--- Why not _______ by boat for a change?
A. to try going
B. trying to go
C. to try and go
D. try going
39. She did nothing _______ at the photo.
A. except look
B. but to look
C. except to look
D. but looking
40. I asked him to _______ me a few minutes so that we could go over all the problems.
A. spend
B. spare
C. save
D. share
41. They won’t let their teacher _______ in that way.
A. to be treated
B. being treated
C. treated
D. be treated
42. John, you must get your room ________ after breakfast.
A. to be cleaned
B. to clean
C. cleaning
D. cleaned
43. The problem _______ at tomorrow’s meeting is a very difficult one.
A. being discussed
B. discussed
C. to be discussed
D. to discuss
44. He reached the station _____ only _____ that the train had just left.
A. tired；learned
B. tiring；learning
C. to tire；to learn
D. tired；to learn
45. --- Did that book give the information you needed?
--- Yes, but ______, we had to read it almost entirely.
A. for finding it
B. to find it
C. finding it
D. by finding it
46. I’m sorry I forgot ______your dictionary. Let’s borrow one from Li Ming.
A. to take
B. taking
C. to bring
D. bringing
47. She couldn’t decide which restaurant _______.
A. to have lunch
B. to eat
C. to eat at
D. eating at
48. This problem is said _____ three times.
A. to have been talked
B. to have discussed
C. having been discussed
D. to have been talked about
49. Everybody believed the man ______ away the diamond ring.
A. be taken
B. taking
C. to take
D. to have taken
50. I prefer ____ rather than ______.
A. read；watch
B. to read；watch
C. reading；to watch
D. to read；to watch
答案：
1-5 DBBAA 6-10 CCAAA 11-15 CADAB 16-20 BBAAA
21-25 ACCAB 26-30 DACBA 31-35 BCCCB 36-40 BBDAB
41-45 DDCDB 46-50 CCDDB
解析：
1．tell sb. not to do sth告诉某人不做某事
2．take sth for granted “把某事想当然”，是一个固定词组。Eg. You shouldn’t take it for granted that everyone should help you.你不要认为每个人都理应帮助你。
4. 不定式的省略要保留到to,否则就完整地表达，如:…but his mother told him not to do so.
5. warn sb not to do sth. 此处用never替代not.
8. allow sb to do sth允许某人做某事；risk doing sth冒险做某事
9. see sb do sth看见某人做某事
12. make sb do 让某人做某事，但用于被动结构后，则要用不定式符号to连接。
16．which 用于有范围中的“哪一个”，此处作buy的宾语。
18．when +to do 做decide的宾语，若用when引导宾语从句，用陈述句语序。
21. pretend to do 假装做某事。
22．forget to do sth忘记（要）做某事。
24．should love to be taken to …愿意被带去……
25．因为状语是last night，用不定式的完成式表示本想……
27. go on to do sth. 继续做（与原来不相同的）事。此句可以从the other exercise断定。
28．stop to do sth. 停下来（去）做……
32．被动语态后用不定式连接，根据句意用完成式。
33. would rather not do sth. 宁愿不做某事。
34. prefer to do sth. rather than do sth. 宁愿做……不愿做……
37．to eat 此处作something 的定语。for+doing多表用途。
38. why not do sth…“为什么不……”；try doing sth试一试
39．Do nothing but do sth, 此处用except替代but
40. spare sb. sth匀出、腾出……，宾语为sb.；share分享，宾语为sth.
41. let sb do, 此处用的是被动语态
42．get sth. done让某事被做
44．tired此处是过去分词，表示主语的状态。only to learn…此处的不定式表结果。
45．此处的to find it, 表示目的
47. to eat at the restaurant, 介词at不能丢
48. 此处使用的是不定式的完成被动式。表示“曾经被讨论过三次”。
巩固练习：
根据句意，用括号内所给动词的适当形式填空。
1．It's time for us _____（have）supper．
2．Would you like_____（go）shopping with me？
3．It took us half an hour_____（work）out the problem．
4．He is old enough_____（join）the army．
5．I feel strange_____（have）a twin sister．
6．I am very glad_____（meet）you here．
7．They prefer_____（stay）at home rather than go out．
8．We saw them_____（come）into the room just now．
9．What he said made me_____（feel）sorry．
10．I am sorry．I forgot_____（tell）you the news．
11．His plan is_____（spend）a few days in the mountains．
12．Have you got anything_____（say）？
13．Have you decided which one_____（choose）？
14．Do you know when_____（start）？
15．He is too weak_____（carry）the big stone．
Key:
1．to have； 2．to go 3．to work 4．to join 5．to have 6．to meet 7．to stay 8．come 9．feel 10．to tell 11．to spend 12．to say 13．to choose 14．to start 15．to carry
高中英语语法讲解不定式 （The Infinitive） 定义：动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，既可以有自己的宾语和状语。 E.g. He want his students to read the book aloud. A． 1不定式的构成（以动词do为例） 2 不定式的意义 不定式的一般式(to do ) 一般式表示的动作或状态，发生在谓语动词表示的动作或状态的同时或之后My wish is to become a doctor He seemed to be tired. She stopped to have a rest. 不定式的被动式 (to be done) 当不定式的逻辑主语是这个不定式所表示的动作的承受者时,不定式一般要用被动式. The building to be finished next month is for our teachers. I am going to Beijing, I have something to take to my parents, do you have something to be taken to your parents? 如果谓语表示的动作(情况)发生时, 不定式表示动作正在进行,这时候不定式就要用进行式.（to be doing） They are said to be building another bridge across the street. They seemed to be talking about something important. When I went to his home, he happened to be traveling around the world. I’m glad to be working with you. 如果不定式所表示的动作或状态发生在谓语动词所表示动作或状态之前，就用完成式 (to have done) ；若是在此基础上的被动含义，就用完成被动式( to have been done). He is said to have written a novel about the Long March. He thought it a pity not to have invited us. The assistant seemed to have been fired. He is said to have been taught French when he was a child. Einstein is said to have built up his theory when he was in his twenties. 如果不定式的动作是在谓语所表示的时间之前一直在进行的动作，就要用完成进行式. They are said to have been collecting folk song in Xinjiang. We’re happy to have been working with the experts all the month.
动词不定式用法归纳 动词不定式没有人称和数的变化，在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征，在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外，动词不定式具有动词特点，可以有自己的宾语和状语，组成动词不定式短语。动词不定式的肯定形式是to＋do；其否定形式是not to＋do。 1．作主语 可以直接作主语。如： To see is to believe． 但在英语中，常用it作形式主语，真正的主语即动词不定式放在后面。如： It's wrong to play tricks on other people． It's our duty to keep our environment clean and tidy．（Lesson 10）． 点击规律：动词不定式在句中作主语时，常放在It is ＋adj．（形容词）＋to do sth．或 It is ＋n．（名词）＋to do sth．句型中，it仅作形式主语。 2．作宾语 a.以下动词只能to do 作宾语。 attempt企图 enable能够 neglect忽视 afford负担得起 demand要求 long渴望 arrange 安排 mean意欲，打算 begin开始 expect期望 appear似乎，显得 determine决定 manage设法 cease停止 hate憎恨，厌恶 pretend假装 ask问 need需要 agree同意 desire愿望 love爱 swear宣誓 volunteer志愿 wish希望 bear承受 endeavor努力 offer提供 beg请求 fail不能 plan计划 bother扰乱；烦恼 forget忘记 prefer喜欢，宁愿 care关心，喜欢 happen碰巧 prepare准备 decide决定 learn学习 regret抱歉，遗憾 choose选择 hesitate犹豫 profess表明 claim要求 hope希望 promise承诺，允许 start 开始 undertake承接 want想要 intend想要 refuse拒绝 decide决定 learn学习 contrive设法，图谋 incline有…倾向 propose提议 seek找，寻觅 try试图 b．love，like ，begin，start，hate ，prefer等词后面可以接不定式。 点击规律：上述动词后面除接不定式外，还可以接动名词，意思无很大区别。 提示板：like doing指经常性动作，而like to do指一次性的动作。如： I like swimming，but I don't like to swim now．我喜欢游泳，但我现在不想游。 c．stop，forget，remember，go on ，try等词或短语后面可以接不定式。 点击规律：上述动词后面接不定式和接动名词意思大不相同。 1）stop to do sth．：停止一件事，去做另一件事。 stop doing sth．：停止正在做的事。 例句：When the teacher came in，the students stopped talking；when he came out，the students stopped to talk． 当老师走进来时，学生们停止说话；当老师走出去时，学生们又开始说话。 2）思考：forget，remember，go on，try等词或短语后面接不定式和动名词用法有何区别d．在find／feel＋it＋adj．＋to do sth．句型中，it是形式宾语，真正的宾语是后面的动词不定式。如： The man downstairs found it difficult to get to sleep． I feel it easy to recite the text． 点击规律：某些动词或短语后面既可以接动词不定式作宾语，又可接动名词作宾语，二者用法上的区别可以通过造句子加以区分，如上面stop例句。 3．作宾语补足语 a．下面的动词要求不定式做宾补：动词+宾语+动词不定式 ask要求，邀请 get请，得到 prompt促使 allow允许 forbid禁止 prefer喜欢，宁愿 announce
八年级英语动词不定式用法梳理 动词不定式是由“不定式符号to+动词原形”构成的一种非 谓语动词结构。有些动词不定式不带to，动词不定式可以作 句子的主语、表语、宾语、定语、补语、状语或单独使用。不定式保留动词的某些特性，可以有自己的宾语、状语等。动词不定式和它后面的宾语、状语等一起构成短语，叫作不定式短语。 一、用作主语 多数情况用it作形式主语，把真正的主语一一动词不定式置于句末，特别是不定式短语较长时。动词不定式作主语，谓 语动词用第三人称单数形式。疑问词+不定式短语作主语可 置于句首，复合不定式结构作主语常置于句末。如： 1.1 t is our duty to try our best to deal With these problems. 2. The head teacher Said it WaS necessary to talk With his mother. 3. HOW to learn EngIiSh well is important. 4. To See iS to believe.（眼见为实；百闻不如一见） 二、用作表语 动词不定式作表语，常说明主语的内容、性质、特征。如： 1. The best Way is to join an EngIiSh club. 2. The first thing is to IiSten to the teacher carefully. 三、用作宾语 1. 可以接带to的
动词不定式作宾语的动词主要有：要求选择 同意(ask, choose, agree)期望决定学习(expect, hope, decide, Iearm，宁可假装知道(prefer, pretend, know)，希望想要愿意(wish, want, would like / love)。女口： 1) We decided to talk to SOme StudentS about Why they go there. 2) He PreferS to eat White bread and rice. 3) Id love to ViSit Mexico. 2. 动词decide, know, learn, show, teach, tell...，介词结构on... 可用疑问词带to的不定式短语作宾语，但Why后面的不定 式不带to。女口： 1) Could you PIeaSe tell me Where to Park my car? 2) It gives advice on What to do in lots of different SitUations. 3. 动词feel, find, make, think等后面，可以用it作形式宾语 代替真正的宾语--- 动词不定式，句子结构是…feel / find / make / ... it+adj. / n.+to do...。女口: 4. 感知动词like, love, know等一般不用进行时态。 5. 后接动词不定式或Ving形式作宾语，意思差别较大的动词有forget, remember等。后接不定式作宾语，表动作尚未发 生；后接Ving形式作宾语，表动作已经发生。stop to do停
动词不定式的用法荟萃 不定式在句子中可做主语、宾语、表语、定语、状语和宾语补语。 1)不定式做主语一般表示具体的某次动作。 【例如】 To complete the 30storied building in one year was quite a difficult task. To do that implies taking responsibility. 当主语较长，谓语较短时，常用it做形式主语，而将不定式放到 谓语的后面。 【例如】 It is important for modern young people to master at least two foreign languages. It做形式主语，不定式放在谓语动词之后常用于下列结构中： a) It is＋形容词(easy, important, difficult, foolish,
inconvenient, unnecessary, right, wrong...)＋( for/of sb.)＋ 不定式 【例如】 It is essential to reserve a table in advance of Christmas Eve. hard to put my hopessintoswords. It is not easy to catch fish with your hands only. It is important for us young people to learn English and master it. b) It is＋名词(a pleasure, a pity, a pleasant thing, one’s du ty, an honor, a shame, a crime, no easy job...) ＋不定式 It is a sheer waste of time to read that kind of trash. It is a pity to have to go without her. It is a glorious death to die for the people.
巧记跟不定式和动名词做宾语的动词用法 语法体现语言的规律,学好英语离不开语法学习。其中，动词的用法是重点，也是难点。对于谓语动词和非谓语动词的用法，学生普遍感到困难。学生感到50多个动词，用法难以掌握，但调整了单词的排列顺序，根据汉意编写顺口溜会方便记忆： （一）跟不定时作宾语的动词有： 打算(intend)计划(plan)和期盼(expect/desire) 假装(pretend)喜欢(would like/love/prefer)表祝愿(wish) 决定(decide)同意(agree)来帮助(help) 设法(manage)说服(persuade)不拒绝(refuse) 好像(seem/appear)答应(promise)做努力(attempt) 选择(choose)询问(ask)多学习(learn) 告诉(tell)失败(fail)也付得起(afford) 不定式宾语要牢记！ （二）跟动名词作宾语的动词有： 考虑（consider）完成（finish）多练习（practise） 避免（avoid）冒险（risk）求建议（suggest/recoomend） 面对（face）喜欢（enjoy/appreciate）和介意(mind) 允许（allow）承认（admit/permit）或放弃(give up/abandon) 推迟（put off/delay/postphone）逃避（escape）不原谅（excuse/pardon）提及（mention）坚持(keep/insist on）要想象（imagine/fancy） 还有词组feel like 和can’t stand！ 瞧！，我们就这样快快乐乐地记住了吧！ （三）在动词remember, try, regret, forget, need/want/require， stop, mean等后跟动名词V-和不定式意义不同，巧记一句话（记住努力；后悔忘记；需要停止；很有意义），学习采用对比法： remember to do something记着去做某事（现在还没有做） remember doing something记着曾做过某事（以前做过某事） try to do something努力、尽力做某事 try doing something试着做某事（看能否达到预期的结果） stop to do something开始做某事（停下正在做的事，开始做另一事） stop doing something停止做某事（停止正在做的事） regret to do something对将来做的事感到遗憾、惋惜 regret doing something对已经做过的事感到后悔
省略to的动词不定式用法归纳 一、使役动词与to的省略 当不定式用于let, make, have等使役动词后作宾语补足语，不定式必须省略to。如： Let me have another cup of tea.给我再来一杯茶。 She had him dig away the snow.她让他把雪挖走。 They made him tell them everything.他们强迫他把一切全告诉他们。 但是，当使役动词用于被动语态时，其后的不定式则必须要带to。如： 他被迫一天工作20小时。 误：He was made work twenty hours a day. 正：He was made to work twenty hours a day. 注意，表示使役意义的let和have很少用于被动语态。 另外注意，force, oblige等虽然也表示“使”，但它们后用作宾语补足语的不定式必须带to。如： They forced her to sign the paper.他们强迫她在文件上签字。 The law obliged parents to send their children to school.法律要求父母送子女上学。 考例： 1.The teacher forbade ________ our seats. https://www.doczj.com/doc/2215179297.html, to leave https://www.doczj.com/doc/2215179297.html, leaving C.to leave D.to leaving 2.Mary had her friend ________ the best one. A.choose B.chosen C.chose D.to choose 3.The girl was ma de _________ she didn’t love at all. A.marry a man B.to marry a man C.to marry with a man D.married with a man 二、感觉动词与to的省略 当不定式用于表示感觉的动词feel, hear, notice, observe, see, watch, look at, listen to等作宾语补足语时，不定式必须省略to。如： We all felt the house shake.我们都感觉这房子在震动。 I heard him go down the stairs.我听见他下楼了。 Did you notice her leave the house?她离开屋子你注意到了吗? I watched her get into the car.我看着她上了车。 但是，当feel后用作宾语补足语的不定式为to be时，则不能省略to。如：They all felt the plan to be unwise.他们都认为这个计划不明智。 注意，当这些动词变为被动语态时，不定式前的to不能省略。如： They were heard to break a glass in the next door.听见他们在隔壁打破了一个
动词不定式用法小结 动词不定式用法小结 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。 一. 作主语例如： To be a doctor is hard. 做医生很难。 To learn English well is not easy. 学好英语不容易。 动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。例如上面的句子可以表示为： It is hard to be a doctor. It is not easy to learn English well. 再如： It’s important to plant trees in spring. 如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for 引导的短语，称为不定式的复合结构。例： It’s good for us to read English aloud in the morning. 对我们来说每天早晨大声读英语是很有益的。 It is important for students to use English every day. 对学生来说每天使用英语是很重要的。 二. 作表语： 动词不定式（短语）作表语常用于系词be的后面。例： His work is to drive a car. 他的工作是开车。 My job is to feed animals. 我的工作是饲养动物。 Her ambition is to be a doctor. 她的理想是当医生。 三. 作宾语 动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin,start, want, forget, remember, show, learn, like, hate, love, ask等。例： I want to tell you a story. 我想给你讲个故事。 They begin to work at eight every morning. 他们每天早晨8点开始工作。 Don’t forget to lock the door. 别忘了锁门。 Would you like to go and have a picnic with us tomorrow? 明天和我们一起去野餐好吗？
非谓语动词之动词不定式（to do）的用法 非谓语动词是指在句子中不是谓语的动词，主要形式有：不定式、动名词和分词（现在分词和过去分词）。 “to do”动词不定式的变形 动词不定式的用法 充当主语（一般会用it 当形式主语） To swim here is dangerous. = It is dangerous to swim here. To pass this English exam is unlikely. = 充当表语（多数情况下，可以转换成动词不定式做主语） My job is to help with your English learning. To help with your English learning is my job. 充当宾语（只能做某些动词的宾语，一般不做介词的宾语；有时用“it”做形式宾语） I decided to attend this meeting last night. I find it necessary to learn a foreign language. 注意：当以下动词欲接动词作宾语时，只能跟不定式作宾语。 decide, determine, learn, wish, hope agree, plan, pretend, dare, refuse, fail prepare, try, manage, help, promise offer, beg, demand, afford, arrange, be supposed
充当宾语补足语 I persuaded him to make a speech in public. 注意：在感官动词／使役动词／help后（see, hear, watch, notice, make, have, let后不定式做宾补时，可省略“to”） I saw them have a disagreement on who should sweep the floor. （我看到了他们争论的整个过程） 但，感官动词后面也可接Ving形式，表示正在进行。 I saw them arguing about who should sweep the floor. （我看到他们正在争论谁该扫地，并不一定看到了整个过程） 充当状语（目的，原因，结果状语，其逻辑主语与句子主语一致） I wrote him a letter to further explain this matter. （目的状语） I’m sorry to bother you.（原因状语） He queued for hours at the box office only to find that the show was sold out. （结果状语，only + to find/realize/discover表示出乎意料的结果） 充当定语（不定式作定语，要放在所修饰的词的后面） I have a lot of dishes to wash. Do you have anything to say There are 3 questions to answer. 一些固定句型中不定式省略“to” had better would rather do… than do… why not do “except/but” 有“do” 无“to”，有”to”无“do” have nothing to do but do… do everything but/except have no choice but to want nothing but/except to 当两个或多个作用相同的不定式并列（and/or/than）时，通常只保留第一个不定式的“to”. He told me to stay there and wait for him. It’s easier to persuade people than force them. To try and fail is better than not to try at all. （否定式中“to”不能省略）
动词不定式的用法总结 动词不定式在中学英语中应用非常广泛，一方面在句中可起名词、形容词或副词的作用，同时也可在句中作主语、宾语、定语、状语和宾语补足语。接下来为大家提供了以下：动词不定式的用法总结一 动词不定式的形式一般是to +动词原形，但to有时要省去。 而动词不定式在具体运用时用不用to，取决于谓语动词的用法。 现就以下几方面介绍如下。 一、不定式结构 1. 带to的不定式结构 能直接跟带to的不定式结构的动词主要有：want, ask, tell, hope, learn, try, decide, forget, remember, like, love, stop, go, come等。 如： I want to go to the movies with you. 我想跟你一起去看电影。 Don’t forget to turn off the light before you leave. 在你离开之前别忘了关灯。 注意：动词不定式的否定形式是在不定式前直接加not，即not to do sth.。
如： Dave told me not to wake up Kate. 大卫告诉我别叫醒凯特。 2. 不带to的不定式结构 以下几种情况使用不带to的动词不定式： (1)在固定词组had better之后。 注意：had better的否定形式是had better not do sth.。 如： You had better go home now. 你最好现在回家。 It’s cold outside. You’d better not go out. 外面很冷，你最好不要出去。 (2)在let, make, see, feel, watch, hear等感官或使役动词后，要跟不带to的动词不定式作宾语补足语。 如： I made them give me the money back. 我迫使他们把钱还给我。 I didn’t see you come in. 我没看见你进来。 (3)在引导疑问句的why not之后。 Why not+不带to的不定式是Why don’t you do的省
高中英语动词不定式用法大全(名师总结必考语法知识点，值得下载) 英语动词的非谓语形式为三种：动词不定式、动名词和分词。非谓语动词没有人称和数的变化。 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to 不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。 一. 作主语例如： To be a doctor is hard. 做医生很难。 To learn English well is not easy. 学好英语不容易。 To say is to believe.眼见为实。 动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。例如上面的句子可以表示为： It is hard to be a doctor. It is not easy to learn English well. 再如： It’s important to pla nt trees in spring. 如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介
词for引导的短语，称为不定式的复合结构。例： It’s good for us to read English aloud in the morning. 对我们来说每天早晨大声读英语是很有益的。 It is important for students to use English every day. 对学生来说每天使用英语是很重要的。 二. 作表语：（在形式上，位于系动词后的就是表语。从含义上讲，表语是回答主语“是什么”或“怎么样”的语法成分。） 动词不定式（短语）作表语常用于系词be的后面。例： His work is to drive a car. 他的工作是开车。 My job is to feed animals. 我的工作是饲养动物。 Her ambition is to be a doctor. 她的理想是当医生。 三. 作宾语 动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin, start, want, forget, remember, show, learn, like, hate, love, ask等。例： I want to tell you a story. 我想给你讲个故事。 They begin to work at eight every morning. 他们每天早晨8点开始工作。 Don’t forget to lock the door.别忘了锁门。 Would you like to go and have a picnic with us tomorrow?明天和我们一
动词不定式用法 动词不定式没有人称和数的变化，在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征，在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外，动词不定式具有动词特点，可以有自己的宾语和状语，组成动词不定式短语。动词不定式的肯定形式是to＋do；其否定形式是not to＋do。 下面以动词不定式在句中的作用来予以详细说明。 1．作主语 可以直接作主语。如：To see is to believe． 但在英语中，常用it作形式主语，真正的主语即动词不定式放在后面。如： It's wrong to play tricks on other people． It's our duty to keep our environment clean and tidy． 点击规律：动词不定式在句中作主语时，常放在It is ＋adj．（形容词）＋to do sth．或It is ＋n．（名词）＋to do sth．句型中，it仅作形式主语。 2．作宾语 a．want，decide ，agree等动词后面跟并且只能跟不定式。如： We agreed to start early． She wants to be a doctor． b．love，like ，begin，start，hate ，prefer等词后面可以接不定式。 点击规律：上述动词后面除接不定式外，还可以接动名词，意思无很大区别。 提示板：like doing指经常性动作，而like to do指一次性的动作。如： I like swimming，but I don't like to swim now．我喜欢游泳，但我现在不想游。 c．stop，forget，remember，go on ，try等词或短语后面可以接不定式。 点击规律：上述动词后面接不定式和接动名词意思大不相同。 提示板： 1）stop to do sth．：停止一件事，去做另一件事。 stop doing sth．：停止正在做的事。 例句：When the teacher came in，the students stopped talking；when he came out，the students stopped to talk．当老师走进来时，学生们停止说话；当老师走出去时，学生们又开始说话。 2）思考：forget，remember，go on，try等词或短语后面接不定式和动名词用法有何区别？ d．在find／feel＋it＋adj．＋to do sth．句型中，it是形式宾语，真正的宾语是后面的动词不定式。如： The man downstairs found it difficult to get to sleep． I feel it easy to recite the text． 点击规律：某些动词或短语后面既可以接动词不定式作宾语，又可接动名词作宾语，二者用法上的区别可以通过造句子加以区分，如上面stop例句。 3．作宾语补足语 a．tell，ask，want，order，teach，invite，warn，wish，help，get，wish，help等词后面常接不定式作宾补。如： I tell him not to go there by bus ． Edison's mother taught him to read and write． b．let，make，have，see，hear，feel，watch，notice后面接不带to的不定式作宾补。如： The boss makes them work 16 hours a day．I heard her sing in the next room． 提示板：若变成被动语态，在上述结构中，不定式符号to要加上。如： They are made to work 16 hours a day by the boss． She was heard to sing in the next room． 4．作定语：放在被修饰的名词、代词后面 例句：I have a lot of work to do． The doctor said he could do nothing to help the boy． 点击规律：动词不定式若在句中作定语，常放在被修饰的名词、代词之后。 提示板：如果动词不定式和前面所修饰的词构成动宾关系，若动词是不及物动词，切记不要忘掉介词。如： I have a small bedroom to live in． Have you got some pens to write with？ 5．表语：放在连系动词be后面 例句：His wish is to become a scientist． The first important thing is to save the soldiers' lives． 当务之急是抢救战士们的生命。 点击规律：动词不定式在句中作表语时，通常对连系动词前面的名词进行诠释说明。 6．作状语
动词不定式用法 不定式是动词的一种非限定式，它是不受主语的单复数、人称、时态、语态等的限定及影响的一种动词形式。 一、动词不定式的基本结构 动词不定式的基本形式为：to+动词原形，有时可不带to。不定式的否定形式是：not to+动词原形。在句中除不能作谓语外，其他成分都可作。如：主语、表语、宾语、宾语补足语、定语和状语等。 注意：不定式之前的to（又称为小品词）与介词to的功能不同。介词to之后要接名词或代词的宾格，或相当于名词的短语作它的宾语；而不定式符号to的后面需要跟动词原形。 speak to him (to 是介词) 对他讲话 to speak English (to 是不定式的小品词) 讲英语 二、动词不定式的用法 不定式在句中有各种作用，一般可归类为三种基本用法：作名词，作形容词，作副词。 (一) 不定式作名词的用法 不定式起名词作用，在句子中担当主语、表语、宾语和宾语补足语。 ⒈作主语
名词用法的不定式和名词一样，可担任句子的主语。 To grow more trees here is very important. (=It is very important to grow more trees here.) 在这里多种些树是非常重要的。 To hear your voice is so nice. (=It is so nice to hear your voice.) 听到你的声音真高兴。 To speak English well is not easy for me. (=It is not easy for me to speak English.) 把英语说好对我来说并不容易。 To walk to school takes me twenty minutes. (=It takes me twenty minutes to walk to school.) 步行到学校我要花20分钟。 注意：在It is… to…‖的句型中，it是形式主语，真正的主语是不定式；使用这种结构，可以避免句子的头重脚轻。通常不定式被视为第三人称单数，所以动词用is或was。 It is bad for your eyes to read in the sun. 在阳光下看书对你的眼睛有害。 另外，不定式作主语的句子，同时有另外一个不定式作表语时，不能转换成―It is… to…‖的句型。 To see is to believe. (百闻不如一见。) 不能转换为：It is to believe to see. 2.作表语
动词不定式专题复习 动词不定式的形式： 动词不定式的用法 1.不定式作主语 ⑴原则上，可用动词不定式直接作句子的主语，通常用it作句子的形式主语，而把不定式移到后面，形成“It + 谓语… + 动词不定式…”的句型。如： To catch the 5：00 bus early in the morning is not a good idea. It is not a good idea to catch the 5：00 bus early in the morning. To learn a foreign language well takes painstaking efforts. It takes painstaking efforts to learn a foreign language well. ⑵若要说明不定式的动作的执行者，可以在不定式前面加上“for + 名词或代词”结构，或是“of + 名词或代词”结构。 It is a great pleasure for me to talk with him. It is very kind of you to help me . ⑶可用于“of + 名词/代词 + 动词不定式”结构中作主语补足语的形容词是指那些可以表示人或事物的性质或品质的好坏的形容词。这些词如：careful， cruel， foolish， bold， brave， good， honest， kind， rude，polite， nice，stupid， selfish， silly， wicked， wise， thoughtful， wrong等。 2.不定式作宾语 不定式作宾语有两种情况：一是及物动词后直接跟带to的不定式，二是“动词+疑问词+带to的不定式”。 ⑴“动词+带to的不定式”结构：常见的以不定式作宾语的动词有afford， appear， agree， ask， believe，decide， demand， desire， fail， hope， intend，learn， mean， offer， promise，refuse， wish等。如： I can‘t afford to buy a house. ⑵“动词+疑问代（副）词+不定式”结构：常见的这类动词有advise， decide， forget， know， learn， remember，see， tell， think， teach， wonder，discover， understand， guess， explain等。这类疑问代（副）词what， when， which， where， how， whether等（不包含why）。如： She does not know how to go there. He will tell you how to deal with it. ⑶在不定式作宾语时，有时我们会使用it作形式宾语，而把不定式放到后面。如： They consider it inappropriate to have classes in the evening. （4）可以作形容词的宾语。这一类形容词有glad, sorry, afraid, pleased, determined, willing, eager, anxious等。例如： I”m determined to give up smoking. He is willing to help us. （5）在tell, advise, allow, forbid, learn, show, decide等词的后面常用“连接词+不定式”作宾语。例如： We must decide whether to go or stay. I don”t know how to get in touch with him.
初中英语动词不定式用法梳理 动词不定式是由“不定式符号to+动词原形”构成的一种非谓语动词结构。有些动词不定式不带to，动词不定式可以作句子的主语、表语、宾语、定语、补语、状语或单独使用。不定式保留动词的某些特性，可以有自己的宾语、状语等。动词不定式和它后面的宾语、状语等一起构成短语，叫作不定式短语。现对九年级动词不定式的用法作一次简要梳理动词不一，定式作主语 直接把动词不定式置于句首的情况不多，多数情况用it作形式主语，把真正的主语——动词不定式置于句末，特别是不定式短语较长时。动词不定式作主语，谓语动词用第三人称单数形式。带疑问词的不定式短语作主语常置于句首，复合不定式结构作主语常置于句末。 二、用作表语 动词不定式作表语，常说明主语的内容、性质、特征) 三、用作宾语 1.可以接带to的动词不定式作宾语的动词主要有：要求选择同意(ask, choose, agree)，期望决定学习(expect, hope, decide, learn)，宁可假装知道(prefer, pretend,know) 希望想要愿意(wish, want, would like / love) 2.动词decide, know, learn, show, teach, tell...，介词结构on...可用疑问词带to 的不定式短语作宾语，但why后面的不定式不带to。 3.动词feel, find, make, think等后面，可以用it作形式宾语代替真正的宾语——动词不定式，句子结构是...feel / find / make / ... it+adj. / n.+to do...。 4.既可接动词不定式又可接ving形式作宾语，意思差别不太大的动词有begin, start, like, love 等。一般说来，动词不定式表一次、数次的具体动作、将来动作或动作的全过程，ving形式表习惯性的连续动作。但是这种区别并不很严格，特别是美国英语，即使 习惯性的动作也可以用动词不定式 begin用了进行时态，后面只接不定式作宾语，表示事情刚开始，还要继续下去。 感知动词like, love, know等一般不用进行时态。 5.后接动词不定式或ving形式作宾语，意思差别较大的动词有forget, remember等。后接不定式作宾语，表动作尚未发生；后接ving形式作宾语，表动作已经发生。stop to do停下来做另外一件事，to do是目的状语；stop doing停止做、不做当前这件事，doing是宾语。try to do尽力做，try doing试试看；go on to do接着做另外的事，go on doing继续做原来的事 四、用作定语 1.句子的主语或宾语是动词不定式的逻辑主语，不定式与其所修饰的名词、代词等存在逻辑的动宾关系时，用动词不定式的主动式。 2.动词不定式所修饰的名词是place, time, way等时，不定式与这些名词呈现出动状关系或同位关系。 3.在“there be...”句型里，句子的主语是动词不定式动作的对象，常用主动式 五、用作补语 动词不定式作补语时，在主动语态句里补宾语，在被动语态句里补主语，句子的宾语或主语是不定式动作的逻辑执行者。如果不定式是to be done，句子的宾语或主语就是逻辑承受者。 1.在主、被动语态句里用带to的动词不定式作补语的动词主要有：要求允许提议(ask, allow, permit, advise)，期望邀请鼓励(expect, suppose, invite, encourage)，教导告诉想要(teach,