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动词不定式

动词不定式

动词不定式一. 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。

同时动词不定式又具有名词、形容词、副词的特征，在句中可以作主语、表语、宾语、宾语补足语、定语和状语。

二. 动词不定式的构成：to+动词原形三. 动词不定式作宾语后面能接不定式作宾语的动词有：agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。

We hope to get there before dark. 我们希望天黑以前到那儿。

The girl decided to do it herself. 那个姑娘决定自己做那件事。

动词不定式作宾语的注意事项（2点）1. 有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：remember to do记住要做某事remember doing记得曾经做过某事forget to do忘记要做某事forget doing忘记曾经做过某事stop to do停下来去做某事stop doing停止做某事go on to do继续做另一件事go on doing继续做原来在做的事I remember seeing you somewhere before.我记得以前在哪儿见过你。

Please remember to turn off the light when you leave.离开时请记得关好灯。

2. 不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。

如：He found it very difficult to get to sleep.他发现很难入睡。

四. 动词不定式作宾语补足语1. 后面能接to不定式作宾语补足语的动词有：ask, order, teach, tell, want, wish, help等。

动词不定式

动词不定式
动词不定式
动词不定式的基本形式是“to+动词原形
“, 有时可以不带to.动词不定式没有人称
和数的变化, 在句子中不能作谓语。动词不
定式仍保留动词的特点，即可以有自己的
宾语和状语。to learn English, to speak
at the meeting.在句中可以作主语、表语、
宾语、宾语补足语、定语和状语。
3. – I can’t work in this way. -- Why not ____ B it in some other way? A. try to do B. try doing C. trying to do D. trying doing 4. Since you find it difficult ____ D a decision, you’d better a discussion( 讨 论) with your parents. A. reach; have B. reaching; have C. reach; having D. to reach; have
They looked for him everywhere and
found him __ b under the tree.
a. lies
b. lying c. lay
d. lain
考点: see/hear/find/watch sb. do sth.
(看见某人做了某事） See/hear/find/watch sb. doing sth. (看见某人正在做某事)
找出句子中的不定式, 并说出作用：
1. It takes you ten minutes to get there. 主语 2. I hope to see him soon. 宾语 3. His wish is to become an artist. 表语 4. People eat to live, but not live to supermarket just now. a. entered b. entering

动词不定式

动词不定式
1.做作业花了我们一小时。
To do the homework takes us an hour ork.
2.爬陡峭的山是危险的。
To climb steep mountain is very dangerous . =It is very dangerous to climb steep mountains.
It is easy for me to solve the problem.
It is very kind of you to help me .
做主语的动词不定式结构 （一）.To do something is +形容词。= It is +形容词to do something .(做某事是怎样的)
B
1.He’d better ___B______ in the street .
A. not to play B. not play C. not playing
2. Do you enjoy ___C____________ a kite in the open air ?
A. to fly B. fly
My sister likes _e_a__ti_n_g__ meat for lunch .
This lunch she likes ______vegetables for lunch .
to eat
请别忘记动词后的介词
Who are you looking __f_o_r____? I need a pen to write __w_i_t_h___. She need a piece of paper to write _o__n____. He is the boy the teacher often talk _t_o__/_w_i.th Whom are you waiting __f_o_r_______ . Who is the next that the doctor will look _o_v_e_r___.

动词不定式

动词不定式

动词不定式学习报告：不定式是动词的一种非谓语形式。

不定式有两种：一种是带to的不定式，另一种是不带to的不定式。

它可以和助动词或情态动词构成谓语。

不定式的否定形式：在to的前面加not.不定式的复合结构：for somebody to do something.不定式的复习要点：1.不定式的否定形式：在to的前面加not.2.不定式有两种：一种是带to的不定式，另一种是不带to的不定式3.不定式在句中做宾语时应该注意：不定式在感官动词和使役动词后作宾语时不带to。

注意：请熟记以下顺口溜：四看：即四个表示看的动词：see,watch,notice,observe.三使：即三个使役动词译成中文让：make have let.两个短语：listen to look at.一听：hear一感觉：feel一可带可不带（动词后加不加to都可以）：help4.不定式在句中作定语时应该注意：不定式做定语时，通常以短语的形式出现，因此要放在他所修饰的名词或代词之后。

当它所修饰的词是不定式动作的接受者时，它所修饰的名词或代词是动宾关系。

如：Lucy wanted to find something to read.Lucy wanted to find a pen to write with.注意：如果不定式本身是不及物动词，不能和所修饰的动词产生动宾关系时，要搭配相应的介词。

5.不定式在句中做状语时应该注意：1.不定式做结果状语时主要用在too...to...,和...enough to ...的结构中，在试题中主要是这两个结构和so...that...（带结果状语从句的复合句）结构的互相转换。

如：The problem is so easy that all of us can work it out.=The problem is easy enough for us to work out.The problem is so difficult that we can't work it out.=The problem is too difficult for us to work out.=The problem isn't easy enough for us to work out.2.不定式在句中做目的状语时常用in order、so as 这些词来修饰不定式短语。

动词不定式

动词不定式

动词不定式一、动词不定式的概念非谓语动词包括动词不定式、动名词、现在分词和过去分词。

动词不定式（The Infinitive）一般由“to + 动词原形”构成。

它在句中起名词、形容词或副词的作用，同时也保留着动词的一些特征，它可以有自己的宾语或状语。

二、不定式的功能与用法（1）作主语：To see is to believe.眼见为实。

（百闻不如一见）To know everything is to know nothing. 事事皆懂，无一精通。

注意：不定式作主语时，常用it 作形式主语，而将作主语的不定式放在句子后部。

例如：It is exciting to surf the Internet. 上网是件令人兴奋的事。

It’s necessary for you to lock the car when you do not use it.不用车的时候，锁车是有必要的。

It’s very kind of him to help us.他帮助我们，他真好。

★It's …for sb. ... 和It's…. of sb. …这样的句子中，由于表语形容词性质的不同，导致了不定式逻辑主语标志用for 或of的区别。

1）for sb.句型中的形容词一般为表示事物的特征、特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：例如：It’s very hard for him to study two languages. 对他来说学两门外语是很难的。

2）of sb.句型中的形容词一般为表示性格，品德，心智能力，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, right。

例如：It seemed selfish of him not to give them anything.他不给他们任何东西，这显得太自私了。

(完整版)英语动词不定式大全

(完整版)英语动词不定式大全

英语动词不定式大全动词不定式是一种活跃的非谓语动词.它在句中起的是名词。

形容词或副词的作用，可在句子中作主语。

宾语。

定语。

状语和宾语补足语。

动词不定式的形式是"to +动词原形",但to有时要省去。

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:一。

带to的不定式结构1.我们学过的能直接跟带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。

2.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。

例如：Jim told me not to wake up Kate.吉姆告诉我别叫醒凯特.二。

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.。

例如: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.例如: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…的省略，可以用来提出建议或劝告。

例如:Why not go with us。

为什么不和我们一起去呢。

Why not take a holiday。

动词不定式

动词不定式

Infinitive不定式用法知识要点要点四语法动词不定式动词不定式由“to+动词原形”构成，其否定形式是“not to do”。

(1)不定式的用法①作主语：不定式短语作主语时，句子的谓语动词常用单数，其位置有两种。

a.把不定式置于句首。

例句：To get there by bike will take us half an hour.骑自行车去那里要花半个小时。

b.用it作形式主语，把真正的主语（不定式）置于句后，常用于下列句式中：It+be+名词+to do sth.知识要点例句：It’s our duty to obey the law.遵守法律是我们的责任。

It takes sb.+some time+to do sth.例句：How long did it take you to finish the work?完成这项工作花了你多长时间？It+be+形容词+for sb.+to do sth.注意：在表示事物性质的形容词后常用介词for,这类形容词有hard,easy,heavy,necessary,possible,important,difficult等。

例句：It’s hard for him to get rid of his bad habits.对他来说改掉坏习惯很难。

It+be+形容词+of sb.+to do sth.注意：在表示性格特征、行为表现的形容词后用介词of,这类形容词常用的有good,kind, nice,clever,honest,wise,careful,brave,careles s,cruel,foolish,rude,stupid,silly等。

例句：It is stupid of you to write down everything the teacher says.把老师说的每件事都记下来，你真是愚蠢。

It seems (appears)+形容词+to do sth.例句：It seemed impossible to save money.存钱似乎不太可能。

动词的不定式

动词的不定式

动词不定式动词不定式在中学英语中应用非常广泛，一方面在句中可以起名词，形容词，或副词的作用，同时也可在句中做主语，宾语，表语等。

动词不定式的形式一般是“to+动词原形”，但是to 有时候可以省去。

（一）不定式做主语动词不定式做主语时，句子中谓语动词常用单数，其位置有以下两种。

1.把动词不定式置于句首。

To see is to believe .百闻不如一见2.用it 做形式主语，把真正的主语不定式放在后面，常有以下句型(1).It+be +名词+to do sth.It’s our duty to take good care of the old. 好好照顾老人是我们的责任。

（2）It takes sb +some time +to do sthHow long did it take you to finish the work? 完成这项工作你花了多少时间（3）It +be+形容词+for sb+to do sth.It’s necessary for you to lock the car.锁车是很有必要的。

（4）It +be +形容词+ of sb+to do sth.It was silly of us to believe him.我们真愚蠢，竟然相信了他的话。

（5）It seems\appears +形容词+to do sth.It seemed impossible to save money.省钱看起来是不可能的（二）动词不定式做宾语能以不定式做宾语的动词很多，常见的有：want,like,wish,hate,prefer,hope,continue,manage,try,ask,offer,start,forge t,promise,mean,pretend,intend,begin,attempt,decide,learn,desire,agree, care,choose,determine,undertake,expect等。

动词不定式

动词不定式

C-不定式的概念、作用语法梳理不定式一、概念：在语法中，动词不定式是指动词的一种不带词形变化从而不指示人称、数量、时态的形式。

形式为：to+动词原形+其他。

之所以被叫做不定式，是因为动词不被限定，或者说不被词形变化所局限。

不定式属于非谓语动词。

不定式的时态有：一般式、进行式、完成式和完成进行式。

二、不定式的作用1、作主语。

不定式作主语时，谓语用单数。

往往用it作形式主语，把不定式放在谓语后面。

如：It took us two hours to finish the job.It is impossible for us to get there on time.It is very kind of you to help us.注意：（1）其他系动词如look, appear等也可用于此句型。

（2）当不定式作主语的句子中又有一个不定式作表语时，不能用It is …to…的句型。

试比较：It is to negate(取消，否定）my own idea to believe him.（错）To believe him is to negate my own idea .（对）（3）It is+ adj. of / for sb. to do sth. 结构中，当不定式的逻辑主语和前面的形容词可以构成系表结构时，用of, 否则用for.2、作宾语（1）动词+不定式。

如：He managed to escape from the fire.I find it hard to get along with him.（it 作形式宾语）（2）动词+疑问词+to , “特殊疑问句+不定式”相当于名词，作宾语。

如：I don’t know what to do next/ how to do it next.I can’t decide when to go there.注意：不定式短语作宾语时，如果还带有宾语补足语，往往把不定式短语放在宾语补足语之后，用it 作形式宾语。

动词不定式

动词不定式

• 二、功能如同名形副 不定式在句子中相当于名词、形容词、副词。 1、不定式可以作主语、宾语和表语，相当于一个名 词，如： To see is to believe. 眼见为实。 注意：在系表结构中，当主语是表示目的的名词(如 purpose、aim、objective、goal、intention等)时，表语要 用不定式，如： Our goal is to satisfy customers' needs. 我们的目标 是满足顾客的需要。 2、不定式可以作定语和补语，相当于一个形容词， 如： John is the first disabled person to sail around the world. 约翰是第一个环球航行的残疾人。 3、不定式可以作状语，相当于一个副词。不定式常 作目的状语，此时它也常用于一些固定搭配(如in order to、 so as to等)，如： Many people open blogs so as to exchange their own views and thoughts with others. 许多人创建博客， 以便和他人交流自己的观点和看法。
• 动词不定式 • 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。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。
•
地点状语从句 (adverbial clause of place) 地点状语 从句一般由连接副词where, wherever等引导，已经形成 了固定的句型.
• Where＋地点从句，（ ＋地点从句，（there）＋主句。 ）＋主句 【注意】此 ，（ ）＋主句。 句型通常译成“哪里……哪里就……”；主句在从句后面 时，there可用可不用；如果主句在从句的前面时，一般 都不用there。例如： Where there is no rain, farming is difficult or impossible.在没有雨水的地方，耕作 是困难的，或根本不可能的。 They were good persons. Where they went, there they were warmly welcomed. 他们都是好人。因此他们走到哪里都受到热烈 欢迎。 You should have put the book where you found it. 你本来应该把书放回原来的地方。 Where the Communist Party of China goes, there the people are liberated.哪里有了中国共产党，哪里人民得解放。

动词不定式

动词不定式


二、作补语 1) 动词+宾语+不定式(to do)

advise,allow,appoint,believe,cause,challenge,command,co mpel,consider,declare,drive,enable,encourage,find,forbid,f orce,guess,hire,imagine,impel,induce,inform,instruct,invite,j udge,know,like,order,permit,persuade,remind,report,request,require,select,send,state,suppose,tell,thi nk,train,trust,understand,urge,warn… 例句： a. Father will not allow us to play on the street. 父亲不让我们在街上玩耍。 b. We believe him to be guilty. 我们相信他是有罪的。
不定式在句中的成分
一、作宾语 1）动词+ 不定式 afford,aim,appear,agree,arrange,ask,be,decide,bo ther,care,choose,come,dare,demand,desire,deter mine,expect,elect,endeavor,hope,fail,happen,help, hesitate,learn,long,mean, manage,offer,ought,plan,prepare,pretend,promise, refuse,seem,tend,wait,wish. The driver failed to see the other car in time. 司机没能及时看见另一辆车。 I happen to know the answer to your question. 我碰巧知道你那道问题的答案。

动词不定式

动词不定式

动词不定式&双宾语一、动词不定式1.动词不定式作宾语：动词+to do(带to不定式)动词不定式置于谓语动词之后，作动词的宾语，表明意图、希望或决定的内容。

常见的动词有：plan, decide, hope, want, agree, offer, try, like, love, ask, start, remember，learn, happen等。

如：I hope to see the film this weekend.They decided to visit the Great Wall next year.2.动词不定式作宾语补足语：（1）.宾语补足语是用来补充说明宾语的。

表示宾语的状态、特征、身份等。

可接动词不定式作宾补的有:ask, tell, allow, help, would like, expect, warn等。

如：The WWF chose the panda to be its symbol.I ask my mother to help me.（2）.使役动词：let, make等后面接不带to的动词不定式作宾补。

如：He makes everyone laugh.（3）.感官动词：see, hear, notice, watch, listen to等后面接不带to的动词不定式作宾补。

如：I hear her sing this song.3.动词不定式的否定式：not to do sth./ not do sth.如：She tells me not to touch anything.4.动词不定式作目的状语:表示“做某事是为了什么”。

此时，不定式既可以放在句首，也可以放在句尾。

如：I revised my lessons carefully to get good marks in the test.= To get good marks, I revised my lessons carefully.为了在考试中取得好成绩，我认真地复习功课。

英语不定式

英语不定式

概念：动词不定式一．动词不定式由to+动词原形构成。

这里的to是不定式标志，没有词义。

不定式具有名词、形容词或副词的某些语法功能，又有动词的时态和语态的特点及作用。

可以做主语、宾语、宾语补足语、表语、定语、状语。

二．动词不定式的形式和时态动词不定式是非谓语动词的一种，由不定式符号(to)加动词原形构成。

不定式的形式有五种：1．一般式to do例如：I like to read English.2．进行式to be doing例如：He seemed to be reading something at that time.3．完成式to have done例如：He seemed to have cleaned the room.4．被动式to be done例如：The work is to be done soon.5．完成被动式to have been done例如：The boy is said to have been sent to hospital yesterday.6.。

否定形式not to do例如：He asked me not to make such a mistake.三．.动词不定式与疑问词连用疑问代词who, what, which和疑问副词when, where, how, why等后面可以接动词不定式，构成动词不定式短语，可以在句子中作主语、宾语、表语等成分。

例如：(1) He doesn’t know how to use the machine.（不定式作宾语）(2) How to use the machine is a question. （不定式作主语）注意:疑问词带不定式在句中作主语时，谓语动词用单数。

(3) The question is when to go there. （不定式作表语）一、作主语动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种：(1)把不定式置于句首。

动词不定式

动词不定式

动词不定式动词不定式是由“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：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。

如：1.As young adults, it is our duty to try our best to deal with each challenge..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 to improve your English is to join an English club. (p.7)如果主语部分含实义动词do，且作表语的动词又是“do”的内容，这时表语不定式的“to”可以省略。

如：All I did was wait here. 我能做的就是在这里等。

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)。

如：1)We decided to talk to some students about why they go there. (p.88)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。

动词不定式

动词不定式

动词过去式1．am,is -was2. are--were3. 击败;敲打beat--beat4. 成为/变成become--became5. 开始begin--began6. 吹;刮blow--blew7. 折断;打破break--broke8. 带来bring--brought9. 建设;建造build--built10. 买buy--bought11. 能,能够can--could12. 抓/捉住;乘车catch-cought13. 选择;选choose--chose14. 来come--came15. 值cost--cost16. 切;割;砍cut-cut-17. 做do--did18. 绘画;画draw--drew19. 喝drink--drank20. 驾驶drive--drove21. 吃eat--eat22. 掉下;降落fall--fell23. 感到;感觉feel--felt24. 发现;找到find--found25. 飞fly--flew26. 忘记forget-forgot27. 取;获得get--got28. 给give--gave29. 去;走go--went30. 种植;成长grow--grew31. 有/吃have/has--had32. 听见hear--heard33. 保持keep--kept34. 知道;认识know--knew35. 学习;学会learn-learnt/learned36. 离开;落下leave--left37. 借出/给lend— lent38. 让let--let39. 位于lie--lay40. 丢失lose--lost41. 可以may--might42. 意味;意思mean---meant43. 遇见/到meet--met44. 放put--put45. 读read --read注意读法不同/e/46. 骑ride--rode47. 铃响ring--rang48. 跑run--ran49. 说say--said50. 看见;看望see--saw51. 卖sell--selt52. 送send--sent53. 将;应该shall--should54. 照耀shine--shone55. 唱sing--sang56. 坐sit--sat57. 睡觉sleep--slept58. 闻;嗅smell--smelt59. 说;讲speak--spoke60. 花费;度过spend--spent61. 站stand--stood62. 扫;拖地sweep--swept63. 游泳swim--swam64. 拿走;带走take --took65. 教teach--taught66. 告诉;讲tell--told67. 想;认为think--thought68. 扔;掷throw--threw69. 理解/明白understand--understood70. 醒wake--woke71. 穿;戴wear--wore72. 将;愿will--would73. 赢得;战胜win--won74. 写write—wrote不规则动词巧记表英语动词按其过去式和过去分词的构成方式可分为规则动词和不规则动词。

动词不定式

动词不定式

I’m sorry to have lost your key. 我很抱歉把你的钥匙弄丢 了。 I meant to have finished my work last night, but I didn’t feel very well. 我本来想昨晚完成工作的，但是我 感觉身体不舒服。 It has been an honor for me to have been invited to your country. 对我来说，被邀请来你们国家是一件很荣 幸的事情。 D． 不定式的完成进行式 不定式的完成进行式表示的动作在谓语之前发生并且一直 进行着。 He was said to have been living in London for twenty years. 据说他在伦敦一直住了20年。 I‘m sorry to have been interrupting you. 很抱歉，我一 直打扰你。
动作同时或几乎同时发生，或是在它之后发生。 He appears to be very happy. 他看起来好像很高兴。 （同时发生） To catch the train, we‘d better hurry to the station by taxi. 为了赶上火车，我们最好赶紧乘出租车去车站。 （to catch the train发生在hurry to the station之后） B．不定式的进行式 不定式的进行式表示正在进行的或与谓语动词同时发生的 动作。 It happened to be raining when I got there. 我到达那里 的时候，天碰巧在下雨。 I’m glad to be traveling with you. 我很高兴和你一起旅游。 C． 不定式的完成式 不定式的完成式表示的动作在谓语表示的动作之前发生。

动词不定式

动词不定式

wrong, honesy…
It’s kind __o_f___you to help me
You are kind t精o品PPhT elp me.
做宾语
宾语表示主语所做动作的承受者.一般跟在及物 动词后面.
接动词不定式作宾语常见的几个动词是want , plan , hope , decide , begin , start. need , wait ,would like .hate.refuse.wish . prefer , learn.try.like .agree ,fail. be able to do,do one’s
7.I went to see you. 〔作目的状语〕
8.He went so early as to see you
〔作结果状语〕
精品PPT
作主语 不定式做主语时，可以直接放在谓语动词之 前。 To see is to believe．
Not to get there in time is your fault. 注：常用it做形式主语，将to do放在谓语之后，使句 子保持平衡。
to do doing
go on
精品PPT
1. Boys, don't forget _____ the windows before you leave the classroom. A. closing B. closed C. to closing D. to close
2.She reached the top of the hill and stopped _______ on a big rock. A. to have rested B. resting C. to rest D. rest

动词不定式

动词不定式

动词不定式动词的非谓语形式有三种：不定式、动名词和分词一、动词不定式：动词不定式是动词的非谓语形式的一种，其形式是to + 动词原形，在句中可作除谓语以外的任何语法成分，即可作主语、宾语、定语、状语、表语和宾语补足语。

▲作主语：1. To obey law is everyone’s duty.遵守法律，人人有责。

2. To know oneself is difficult. 了解自己很难。

3. To do such things is foolish. 做这样的事是愚蠢的。

【注】在现代英语中，常用it作形式主语，把真正作主语的不定式短语放在后面。

4. It’s not easy to learn a foreign language well.要学好一门外语是不容易的。

5. It will not cost you anything to be polite. 礼貌待人并不会损失你什么。

6. It was impossible for him to explain what I meant. 要他把我的意思解释清楚是不可能的。

【注】在感叹句和疑问句中只能用it作形式主语。

例如：7. What harm can it do to give advice? 给人出主意有什么不好的？8. What fun it is to jump into a pool or lake in summer! 在夏天跳进游泳池或湖水里游泳是多么有趣啊！9. How long did it take you to finish the work? 你完成这项工作花了多少时间？▲在这种结构中，如果要表示不定式动作的执行者，要在不定式短语前加上一个for sb. 的短语，语法上称为不定式的复合结构。

例如：10. It is useful for you to learn some spoken English. 学一些英语口语对你来说是有用的。

动词不定式

动词不定式
⑤作宾语 常见的可接不定式作宾语的动词:
want, like ,wish, hope, prefer ,ask, offer, promise , pretend(假装), intend(打算), decide , plan, refuse, tend(趋向, 照料)等.
Grammatical Structure
Grammatical Structure
还可以用于双宾语:
I asked him how to learn English. 我问他如何学习英语.
Grammatical Structure
“口诀” 谓语之外均担任，用作谓语需合成。 动词特征似保留，宾语、状语照样跟。 时态、语态酌情用，动作先后注区分。
Grammatical Structure
⑥作宾语补足语
The teacher advised us to have a rest first.
She encouraged me to try again.
Grammatical Structure
B). see, hear, feel, listen to, look at, make做不 带to的不定式作宾语补足语.
动词不定式
Grammatical Structure
Grammatical Structure
1.动词不定式的特点及构成 2.动词不定式的时态及语态 3.动词不定式的语法功能
动词不定式 动词不定式特点：
1.不能单独作谓语. 2.可做主语、表语、定语、宾语、 宾语补足语和状语 动词不定式的构成:
to + 动词原形 to study. to work, to know
Did you notice a man come in?

动词不定式

动词不定式

动词不定式动词不定式的基本形式是to+动词原形，有时可以不带to。

动词不定式没有人称和数的变化，在句子中不能作谓语。

（但可以担任除谓语外的任何成分——主语、表语、宾语、状语和宾语补足语。

）动词不定式仍保留动词的特点，即它可以有自己的宾语和状语。

动词不定式和它的宾语或状语构成不定式短语。

1不定式作宾语1．1动词+不定式afford，aim，appear，agree，arrange，ask，be，decide，bother，care，choose，come，dare，demand，desire，determine，expect，elect，endeavor，hope，fail，happen，help，hesitate，learn，long，mean，manage，offer，ought，plan，prepare，pretend，promise，refuse，seem，tend，wait，wish，undertakeThe driver failed to see the other car in time.司机没能及时看见另一辆车。

I happen to know the answer to your question.我碰巧知道你那道问题的答案。

1．2动词+不定式；动词+宾语+不定式ask,beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…I like to keep everything tidy.我喜欢每件东西都保持整洁。

I like you to keep everything tidy.我喜欢你年使每件东西都保持整洁。

I want to speak to Tom.我想和汤姆谈话。

I want you to speak to Tom.我想让你和汤姆谈话。

1．3动词+疑问词+todecide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tellPlease show us how to do that.请演示给我们如何去做。

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动词不定式专题练习1. This company was the first ____ portable radios as well as cassette tape recorders in the world.A. producingB. to produceC. having producedD. produced2. The purpose of new technology is to make life easier, ____it more difficult.A .not making B. not make C .not to make D. nor to make3. Helen had to shout ______above the sound of the music .A .making herself hear B. to make herself hearC. making herself heard D .to make herself heard4. I don’t know whether you happe n_______ ,but I am going to study in the U.S.A this September.A .to be heard. B. to be bearing C .to hear D .to have heard5. The news reporters hurried to the airport, only ______the film stars had left.A .to tellB .to be toldC .tellingD .told6. You were silly not _______your car.A. to lockB. to have lockedC. lockingD. having locked7. The teacher asked us ______so much noise.A .don’t make B. not make C. not making D .not to make8. An army spokesman stressed that all the soldiers had been ordered _____clear warnings before firing any shots.A .to issue B. being issued C. to have issued D. to be issued9. I’d rather have a room of my own, however small it is, than_______ a room with someone else.A. to shareB. to have sharedC. shareD. sharing10. The bank is reported in the local newspaper_________ in broad daylight yesterday.A. robbedB. to have been robbedC. being robbedD. having been robbed11. A number of paintings in the castle are believed ________in a fire.A. being destroyedB. having been destroyedC. to be destroyedD. to have been destroyed12. The meeting _______ next week is sure to be a great success.A. to take placeB. to be taken placeC. to have taken placeD. being taken place13. As a result of my laziness, I failed ________ my work in time.A. and finishedB. to finishC. and finishingD. to finished14. I am sorry ______ written you a letter at the time.A. to have notB. to not haveC. not to haveD. not having15. Will you lend him a magazine _________?A. to be readB. for readingC. to readD. he read16. He could do nothing but _______for the bus _________.A. wait, to comeB. wait; comeC. waiting; comingD. waited; came17 .It is a problem that doesn't need ________ right now.A. to solveB. solvingC. being solvedD. to be solving18. There’s a man at the reception desk who seems very an gry and I think he means _______ trouble.A. makingB. to makeC. to have madeD. having made19. I remember _______him _______the bike needed __________.A. hearing, saying, to repairB. to hear, say, to repairC. hearing, say, repairingD. to hear, saying, to be repaired20. --- You should have thanked her before you left.--- I meant _________, but when I was leaving I couldn’t find her anywhere.A. to doB. toC. doingD. doing so21. Robert is said to __________ abroad, but I don’t know what country he studied in.A. to have studiedB. to study B. to be studying D. to have been studying22. I’m gong to Xi’an next week. Have you anything __________ to your parents?A. to takeB. to be takenC. to be bought toD. to buy23. when are they __________ in their plan?A. handB. handedC. to handD. give24. In such dry weather, the flowers will have to be watered if they _____________.A. have survivedB. are to surviveC. would survivedD. will survive25. When we hurried to the station, there happened ________ no bus at that time.A. to haveB. to beC. havingD. being26. I lost my way in complete darkness and, _________ matters worse, it began to rain.A. madeB. having madeC. makingD. to make27. At ________ time does the salesgirl get up late in the morning, though she isalways too busy _________ a good rest.A. no, to takeB. no, takingC. any, to takeD. one, taking28. --Are you a student?--No, but I used _________.A. to beB. to wasC. to doD. to be a29. I stopped to listen, and my son seemed _________ himself _________ in the living room.A. to enjoy, to shutB. to be enjoying, shuttingC. to be enjoying, shutD. to have enjoyed, having shut30. With a lot of difficult problems _________, the newly-elected president is havinga hard time.A. settledB. settlingC. to settleD. being settled。