动词不定式的基本用法
动词不定式的用法
动词不定式的用法动词不定式的形式：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。
动词不定式的用法大全
动词不定式的用法大全动词不定式是英语中的一种非谓语动词形式，通常由“to”加上动词原形构成。
它有多种用法，包括以下几个方面：1. 表示目的或意图，动词不定式可以用来表示一个动作或状态发生的目的或意图。
例如，"She studies hard to pass the exam."（她努力学习是为了通过考试。
）。
2. 作为动词的宾语，动词不定式可以作为另一个动词的宾语。
例如，"I want to learn a new language."（我想学一门新语言。
）。
3. 作为形容词的补语，动词不定式可以作为形容词的补语，用来修饰名词或代词。
例如，"It's important to finish the work on time."（及时完成工作很重要。
）。
4. 作为状语，动词不定式可以用来修饰句子或句子中的动词，表示目的、原因、结果、条件等。
例如，"He works hard to support his family."（他努力工作是为了养家糊口。
）。
5. 与情态动词连用，动词不定式可以与情态动词连用，表示不同的情态含义，如推测、必要性、可能性等。
例如，"You should study harder to improve your grades."（你应该更努力学习来提高成绩。
）。
6. 作为主语，动词不定式有时可以作为句子的主语。
例如，"To travel around the world is my dream."（环游世界是我的梦想。
）。
总的来说，动词不定式在句子中具有多种用法，可以表示目的、作为宾语、形容词的补语、状语、与情态动词连用，甚至可以作为句子的主语。
掌握动词不定式的用法对于准确理解和运用英语语法至关重要。
希望这些信息能够帮助你更好地理解动词不定式的用法。
动词不定式的用法归纳
不定式作结果状语常用如下句型
He
hurried to the school to find nobody there. （结果） He is too old to lift the box.
The
room is big enough to hold us. It is such a big room as to hold us. He is so kind as to help us. such +（形容词）名词 +as to do sth so + 形容词/副词 + as to do sth
3) 不定式用在介词but, except, 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).There is nothing to do but wait. (3). I have no choice but to go.
people. (object complement)
Quiz II Multiple Choice 1. I don’t know whether you happen ____, but I’m going to study in the USA this September. (2004 辽宁）
3. 表示原因: 不定式可以用在作表语的形容词后作 状语, sorry, surprised, happy, glad, eager, angry, foolish, right, wrong, slow, quick, rude, cruel, disappointed等。
eg: I’m glad/pleased to see you. We were surprised to hear the news.
动词不定式的基本用法归纳
动词不定式的基本用法归纳动词不定式的基本用法归纳一、动词不定时的形式肯定式：肯定式：to do sth 否定式：否定式：not to do sth. 被动式：被动式：to be done 完成式：完成式：to have done二、动词不定式的用法1.作主语A. 动词不定式作主语，谓语动词用单数形式。
动词不定式作主语，谓语动词用单数形式。
如：(1)To see is to believe. (2)To master English gives us much help in the study of sience. B. 不定式或不定式短语作主语时，常用作形不定式或不定式短语作主语时，常用it作形式主语，构成“ 形容词(+for sb.)不定式” 不定式” 式主语，构成“It is + 形容词不定式结构。
结构。
It is impossible for him to give up smoking.2.作宾语A.动词后直接不定式作宾语的动词有许多，如 .动词后直接不定式作宾语的动词有许多，want, decide, intend, fail, wish, export, pretend, choose等等。
等等。
等等I mean to go there at once. B.不定式短语作宾语时，如果还带有宾语补足语，不定式短语作宾语时，如果还带有宾语补足语，不定式短语作宾语时往往把不定式短语放在宾补之后，而用it作形式往往把不定式短语放在宾补之后，而用作形式宾语。
句型为“主语+find(feel, think, believe, 宾语。
句型为“主语consider, etc) +it+形容词名词形容词/名词形容词名词+to do sth”。
I think it necessary to report the thing to the teacher. I find it interesting to work with him.C.动词不定式还可以用作介词宾语，但仅限于 .动词不定式还可以用作介词宾语，介词except和but(除了)。
动词不定式的用法总结及例句
动词不定式的用法总结及例句动词不定式是指以动词原形加上to构成的形式，在句中可以充当名词、形容词或副词的功能。
以下是动词不定式的用法总结及例句：1. 作为动词的目的或意图：- I want to go to the beach.（我想去海滩。
）- She studies hard to get good grades.（她努力学习以获得好成绩。
）2. 作为动词的补足语：- My goal is to learn a new language.（我的目标是学一门新语言。
）- The teacher asked us to complete the assignment.（老师要求我们完成作业。
）3. 作为形容词的补足语：- The task is difficult to complete.（这个任务很难完成。
）- She is happy to help.（她愿意帮助。
）4. 作为副词修饰动词：- He ran to catch the bus.（他跑着去赶公交车。
）- She sings beautifully to entertain the crowd.（她唱得很好听来取悦观众。
）5. 作为短语动词的一部分：- I look forward to seeing you.（我期待见到你。
）- He decided to give up smoking.（他决定戒烟。
）6. 作为动词的主语：- To live a healthy lifestyle is important.（过健康的生活方式很重要。
）- To travel the world is his dream.（环游世界是他的梦想。
）7. 作为动词的宾语：- I like to read novels.（我喜欢读小说。
）- They want to visit their grandparents.（他们想去拜访祖父母。
）需要注意的是，动词不定式在句中的位置可以灵活变化，但通常放在动词之后、名词之前、或者作为句子的结尾。
动词不定式有哪些基本用法？
动词不定式做宾语补足语：
例如：
1. I want you to tell me the truth.
2. The boss made workers work for
10 hours every day.
2013 · 漳州
动词不定式有哪些基本用法？
南京市第二十九中 董晓明
动词不定式能起名词、形容词和副词 的作用，可以做除谓语以外的各种成分 （主语、表语、宾语、宾语补足语、定语 和状语），还可以和疑问词连用。动词不 定式的结构是 to+动词原形，否定形式是 not to+动词原形。
动词不定式做主语：
例如：
1. To say something is one thing,
yourself.
A. to ask; write B. to ask; writing
C. ask ; writing
D. asking; to write
1.牢记与动词不定式搭配使用的动词和含有 动词不定式的句型 。 2.在读题时，同学们首先要充分读懂句子意 思，识别出含有动词不定式的短语和句型， 理解动词不定式在句中的作用。
to do is another thing.
2. To see is to believe.
注意： 动词不定式短语用作主语的句中，常
用含有形式主语 it 的句型来替换。
例如： It’s interesting to watch A bite of China.
2012 ·随州 It’s dangerousA ____ with the wild animals. A. for us to play C. for us playing B. of us playing D. of us to play
动词不定式的用法归纳
My question is when to start.
注意：•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?
(9) 不定式的省略
3. 表示原因: 不定式可以用在作表语的形容词后作 状语, sorry, surprised, happy, glad, eager, angry, foolish, right, wrong, slow, quick, rude, cruel, disappointed等。
eg: I’m glad/pleased to see you. We were surprised to hear the news.
(4).独立结构作状语
To tell (you) the truth, I don’t agree with you.
类似的结构 •to be frank, •to be honest (with you), •to make things worse,
(8)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.
4. I don’t have time to sit around feeling sorry for myself. (attribute)
5. I am the only student in my class to have a pet snake. (attribute)
6. A big company has decided to buy it from me. (object)
动词不定式的用法总结
动词不定式的用法总结
1、动词不定式作主语时常用it来作形式主语，而将动词不定式移至谓语动词后作真实主语。
It is dangerous to drive very fast.
2、动词不定式可以作表语，如果主语部分含有实义动词do，且作表语的动词不定式又是do 的内容，这时表语不定式的to可以省去。
My idea is to ring him up at once.
3、动词不定式作宾语。
I do not know who to ask .
4、用作宾语补足语的动词不定式.
He was heard to sing every day .
5、不定式复合结构for somebody to do something。
可用作主语\表语\定语\状语等。
It is for her to decide.
6、作状语的动词不定式常表示目的、原因、方法、方向、结果等。
I am glad to meet you.
7、作定语的动词不定式。
We have no time to go to the town today .。
(完整版)动词不定式用法
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。
的句型中，it是形式主语，真正的主语是不定式；使用这种注意：在It is… to…”结构，可以避免句子的头重脚轻。
初中英语动词不定式的基本用法
动词不定式〔the infinitive〕的根本用法动词不定式1. 其否认形式是“not/never to do / not do〞.2. 根本用法：不定式可以带宾语或状语构成不定式短语，没有人称与数的变化。
一、不定式的句法功能1. 作主语eg: I t’s very common to raise money in Canadian and American school.不定式做主语时,常用代词it 来代替不定式构造, 这时it 被称为形式主语,而作为句子真正主语的不定式那么被后置，往往放v.与adj.之后。
e.g. To learn English well is not easy.= It’s not easy to learn English well.★不定式的逻辑主语有时用“of/for + 名词或代词宾格〞构成, 即：跟踪练习1. It’s very nice of them ________ (send) me the flowers.2. _________ (become) a teacher is my dream.3. It’s very important to learn English well.(同义句转换)________ ________ English well ______ very important.4. It’s important _______ Chinese well.A. to learnB. learnC. learningD. learns2. 作表语eg：The best way to raise money is to sell newspapers.表语是用来表示主语的身份、状态与特征等，可与系动词构成系表构造。
eg：Her wish is to study in Ji Yan Middle school.My job is to clean the streets.跟踪练习1. My work is __________ (clean) the room every day.2. His dream is _________ (be) a doctor.3. 作宾语eg：The driver offered to help the patient.有些动词后只能用不定式作宾语，表示命令、打算或希望等。
中考英语动词不定式及其用法讲解+练习
中考英语动词不定式及其用法讲解+练习1.动词不定式的基本概念：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，在句中不能做谓语，但可以有自己的宾语和状语。
动词不定式跟它的宾语和状语构成了不定式短语，例如：to read the book, to speak at the meeting等。
2.动词不定式的用法：动词不定式具有名词，形容词和副词的特性，因此可在句中作主语，表语，宾语，宾语补足语，状语和定语。
句子用法：作主语：eg:1)To take part in sports is important.2)To see is to believe.动词不定式做主语时常常由it来代替它，做形式主语，而动词不定式放在句末。
eg: It’s great to see you again.It is important to learn English well.It was rewarding to take part in this exchange programmeIt will take us a month to go on study trip to New York.It is necessary for governments to control the population growth.做表语：eg：The best way is to pratice.My dream is either to be a diplomat or to be a teacher of English .A popular use of the computer is to send a e-mail.Her wish is to become a famous star.The best way is to read the play before you see it.做宾语：eg: We are talking about how to solve the problem.I think it not difficult to keep reading English every morning.做宾补：eg: We all expect him to win the contest.Our teacher told us to listen carefully in class.注意：感官动词，或使役动词+宾语+无to的不定式Is Jack in the library ?Maybe I saw him go out with some books just now.Let those in need understand that we will go all out to help them.做定语：Liu Yang is the Chinese woman astronaut to enter the space.You are the last one to win the price.In the future , human will have less work to do.Why don’t you go out to play Rose?I’m afraid I can’t . I have a lot of homework to do.做状语：动词不定式做状语可以修饰动词，一般在句中做原因，目的和结果状语，动词不定式做状语可单独放在句首，句中或句末。
不定式的用法和动词不定式的时态
不定式的用法和动词不定式的时态动词不定式是英语语法中的一种形式，它由不定式标志to加上动词的原形构成。
不定式在句子中可以充当名词、形容词或副词，具有一定的时态和语态。
一、不定式的基本用法1. 作主语：动词不定式可以在句子中作主语，表示某种动作、状态或观点。
- To learn a foreign language is important.- To be honest is always appreciated.2. 作宾语：动词不定式可以作及物动词的宾语，表示及物动词的动作或含义。
- I want to travel around the world.- She decided to quit her job.3. 作表语：动词不定式可以作系动词的表语，表示主语的身份、职业、特点等。
- Her dream is to become a doctor.- The important thing is to keep calm in any situation.4. 作定语：动词不定式可以修饰名词或代词，表示名词或代词的用途、目的等。
- I have a book to read.- We have a meeting to attend tomorrow.5. 作状语：动词不定式可以在句中作状语，表示目的、原因、结果、时间等。
- He exercises every day to stay healthy. (目的)- She cried so hard as to lose her voice. (结果)二、动词不定式的时态动词不定式有两种时态：一般时和完成时。
1. 一般时不定式：使用动词的原形表示不定式的一般时态。
- I hope to visit my grandparents next week.- She likes to read books in her free time.2. 完成时不定式：使用动词的完成时形式，由“to have + 动词的过去分词”构成。
动词不定式的用法
动词不定式的用法动词不定式由to+动词原形构成。
这里的to是不定式标志，没有词义。
一、各种形式1. 基本形式：to+动词原形2. 否定形式：not to donever to do二、用法（一）作主语（谓语动词常用单数）1. 位于句首To keep a pet is interesting.养宠物时间有趣的事。
To get up early is a good habit.早起是个好习惯。
2. 位于句末⑴It's+adj./n.+todo sth.It's easy to make friends with him.和他交朋友很容易。
It's interesting to play games with kids.和孩子们玩游戏很有趣。
It's my dream to be a pilot.成为飞行员是我的梦想。
⑵It's+adj.+for sb.+to do sth.It's not easy for me to make friends.对我来说，交朋友不太容易。
It's possible for humans to fly to the moon.对于人类而言，飞上月球是可能的。
⑶It's+adj.+of sb.+todo sth.=sb.+be+adj.+to do sth.It's very kind of you to help us.=You are kind to help us.小结训练1. It's our duty _________ the room every day.A. to cleanB. cleanedC. cleanD. cleans(甘肃省)2. It's hard for us _________ English well.A. learnB. learnsC. to learnD. learning(江西省)3.建造这座立交桥将花费工人们一年多的时间。
动词不定式的语法总结
动词不定式的语法总结动词不定式是非谓语动词的一种形式，是英语中常见的一种语法，学生一定要做好总结，拿下这个知识点。
小编为大家力荐了动词不定式常用的语法总结，给大家作为参考，欢迎阅读!动词不定式的七种用法动词不定式的基本形式为to+动词原形.1.动词不定式做主语.谓语用第三人称单数形式.如果主语较长则用it做形式主语,将真正的主语动词不定式放到句尾.egTo see is to believe.It's a bad habit to run after dinner.2 做表语.the important things is to save lives.3 做宾语he likes to play with children.4做宾语补足语.形容词做宾补时.常用it做形式宾语.把真正的宾语放到宾补之后.he feels it happy to help others.5做定语she asked me to help her with her English.6做状语you are never too old to learn.(结果状语)7特殊疑问词+动词不定式.I am thinking about what to say.动词的不定式的用法口诀①不定式有标记，to与动词连一起。
②没有人称数变化，动词特点它具备。
③主宾定状表补语，唯独作谓不可以。
④not 加上不定式，否定结构要牢记。
⑤疑问词与不定式，构成短语有意义。
⑥仔细推敲多思考，准确判断有依据。
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 happen_______ ,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 ________ina 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 angry 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.。
动词不定式6种用法总结
动词不定式6种用法总结动词不定式（infinitive）有以下六种基本用法：1. 作为动词的宾语：动词不定式可以作为另一个动词的宾语，例如：- I want to learn Chinese.（我想学中文。
）- She loves to dance.（她喜欢跳舞。
）2. 作为主语：动词不定式可以作为句子的主语，通常用于表达一般的动作、状态、观点等，例如：- To travel is my dream.（旅行是我的梦想。
）- To wait is boring.（等待很无聊。
）3. 作为表语：动词不定式可以作为动词 "be" 的表语，常用于表达目的、原因、结果等，例如：- The purpose of this meeting is to discuss the new project.（这次会议的目的是讨论新项目。
）- Her suggestion is to study harder.（她的建议是更加努力学习。
）4. 作为定语：动词不定式可以修饰名词或代词，通常用来表示目的、结果、用途等，例如：- The best way to learn a language is to practice speaking.（学习一门语言的最佳方法是练习口语。
）- He needs a pen to write with.（他需要一支可以写字的笔。
）5. 作为状语：动词不定式可以作为句子的状语，表示目的、结果、方式、条件等，常常与动词 "to be" 连用，例如：- She went to the supermarket to buy some groceries.（她去超市买些食品杂货。
）- He ran fast to catch the bus.（他跑得很快，以便赶上公交车。
）6. 作为补语：动词不定式可以作为某些动词的宾语补足语，常用于表示目的、愿望、需求等，例如：- They made her promise to come back.（他们让她答应会回来。
动词不定式的用法
动词不定式的用法（一）定义：动词不定式是一种非限制动词形式。
非限定动词是指不能单独在句中充当谓语的动词形式。
非限定动词包括：动词不定式，-ing分词和-ed分词。
非限定动词的共同特征：它们不受句中主语的人称和数的限制，不能单独表示出动作发生的时间；它们都有一定的时态和语态的变化，如一般式，完成式。
学好非限定动词的关键在于学好它们各个的功能和用法，以及与其他两种之间用法上的区别。
动词不定式的形式：1）形式：不定式可分为带“to”（to do）和不带“to”（do）的动词不定式。
2)动词不定式的否定形式为：not+不定式3)不定式的时态语态三大公式：动词时态语态的三个公式如下：一，动词不定式的时态：动词不定式不能在句中作谓语，尽管它本身有时态的变化，但是却不能靠自身的变化形式表示动作发生的具体时间。
动词不定式发生的时间，一般只能根据谓语动词的时间，产生相对的先后时间关系。
1）不定式的一般式：表示不定式的动作与谓语动词动作几乎同时发生，或在谓语动作之后发生，或者不强调不定式动作的时间性。
但若是不定式表原因时，往往先于谓语动作之前发生。
如：The news will not fail to surprise him.这个消息将不会不使他大吃一惊的。
（不定式动作在将来和谓语动作同时发生）I helped to repair the car.我帮助修理汽车。
（不定式动作在过去与谓语动作同时发生）He didn't know where to go.他不知道该去哪儿。
（不定式稍晚于谓语动作）Tell you brother not to come tomorrow.(不定式晚于谓语动作)判断：He decided to sell his car.I tried to go to school in time.I hope to see you soon☆注意：不定式表示谓语动作的原因时，往往发生在谓语动作之前。
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动词不定式的基本用法一、概述动词不定式是一种非谓语动词形式，它能起名词、形容词和副词的作用，在句子中作主语、宾语、定语、表语、宾语补足语和状语。
其形式如下：（主动形式）◆一般式（not）to do一般现在时表示的动词有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。
He seems to know this.我希望再见到你。
_____________________________________________________◆完成式（not）to have done完成时：表示的动作发生在谓语动词表示的动作之前。
He seems to have caught a cold.很抱歉给你带来这么多的麻烦。
____________________________________________◆进行式（not）to be doing进行时：表示动作正在进行，与谓语动词表示的动作同时发生。
He seems to be eating something.他假装在学习。
_______________________________________________________________二、动词不定式的语法功能（一）作宾语1) 动词+ 不定式The driver failed to see the other car in time. 司机没能及时看见另一辆车。
我碰巧知道你那道问题的答案。
____________________________________________________________________★常用的动词有afford, aim, appear, agree, arrange, ask, decide, bother, care, choose, come, dare, demand, desire, determine, expect, hope, fail, happen, help, learn, long（渴望）, mean, manage, offer, ought, plan, prepare, pretend, promise, refuse, seem, tend, wish…2）动词+疑问词+ toPlease show us how to do that. 请演示给我们如何去做。
有这么多的录音机，我都拿不定主意买哪一种。
There are so many kinds of tape-recorders on sale that I can't make up my mind_________________________.★常用的动词有decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell …（二）作补语：1. 动词+宾语+不定式(to do)Father will not allow us to play on the street. 父亲不让我们在街上玩耍。
老师建议我们每天大声读英语。
________________________________________★常见的动词有advise, allow, believe, cause, drive, encourage, forbid, force, hire, inform, instruct, invite, like, order, permit, persuade, remind, request, require, select, send, tell, warn…2. 动词+宾语+不定式(to be )We believe him to be guilty. 我们相信他是有罪的。
我们认为汤姆是班上最好的学生之一。
________________________________________________________________★常用的动词有acknowledge, believe, consider, think, declare(声称), discover, fancy(设想), feel, find, guess, judge, imagine, know, prove, see(理解), show, suppose…（三）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。
To get there by bike will take us half an hour.眼见为实。
_________________________________________________________2. 用it作形式主语，把真正的主语不定式置于句后。
It's our duty to take good care of the old.听到你的声音真高兴。
_________________________________________（四）作表语不定式作表语表示具体动作或将来动作；动名词作表语表示抽象的一般行为。
To be kind to the enemy is to be cruel to the people.Our work is serving the people.（五）作定语不定式在句中作定语，置于被修饰的名词或代词之后。
如：The next train to arrive is from Washington.①关于这个问题你有什么话要说吗？__________________________________________?（六）作状语：常作目的状语搭配有only to (仅仅为了), in order to, so as to, so(such)… as to… (如此…以便……)He ran so fast as to catch the first bus. 他飞快地跑以便赶上第一班车。
我来仅仅是向你告别。
____________________________________________________三、强化练习（一）根据中文意思，完成下列句子1. 很难知道未来是什么样子。
______________ what the future will be like is difficult.= It is difficult ___________ what the future will be like.2. 眼见为实。
To see is _____________________.3. 他答应不把这件事告诉任何人。
He has _______________________ anybody about it.4. 你有什么话要说吗？Have you anything ___________________________ ?5. 为了通过考试，我们得努力学习。
We must work hard in order __________________.6. 请提醒我关门。
Please remind me ___________________________________.7. 他身体太差，不能上学。
He was too weak __________________________________.8. 活到老，学到老。
It’s never too old _______________________.9. 这本书很难懂。
This book is difficult ________________________.10. 我发现在三个小时内完成这项工作是不可能的。
I find it impossible ___________________________________________________.（二）选择最佳答案1. My pets take me a lot of time _______________.A. look afterB. to look afterC. to lookD. looking for\2. The medicine is ______________ three times a day.A. to be takenB. to takeC. to have takenD. to have been taken3. ---- Is Bob still performing?---- I am afraid not. He is said ______ the stage already, as he has become an official.A. to have leftB. to leaveC. to have been leftD. to be left4. The chair man thought ________ necessary to invite Professor Smith to speak at the meeting.A. thatB. itC. thisD. him5. When asked by the police, he said that he remembered ____ at the party, but not ___.A. to arrive; leavingB. to arrive; to leaveC. arriving; leavingD. arriving; to leave6. You were silly not _____________ your car.A. to lockB. to have lockedC. lockingD. having locked7. _________ this cake, you ‘ll need 2 eggs, 175g sugar and 175g flour.A. Having madeB. MakeC. To makeD. Making8. The teacher asked us ___________ so much noise.A. don’t makeB. not makeC. not makingD. not to make9. The building __________ by the building team from Anhui Province next month is a new school.A. to buildB. to be builtC. builtD. being built10. I don’t know whether you happen ________ it, but I’m going to study in the USA this September.A. to be heardB. to be hearingC. to hearD. to have hear。