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1、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。在句中可以作主语、表语、宾语、宾语补足语、定语和状语。,构成：to + do(动词原形),用法：用作宾语 (v. + to do )I want to buy a computer.She hopes to find a better job.I wish to go with you.need to do learn to do agree to do plan to do decide to do refuse to dobegin to do start to do
2、 try to doforget to do remember to do like to doStop to dogo on to do,2. 用作宾语补足语：(v. + sb. + to do ),She asked me to help her.The teacher told him to come on time.Edisons mother taught him to read and write. want sb to dowish sb to do get sb to doorder sb to do find sb to be like sb to do would like
3、 sb to dohelp sb to do,作宾语补足语不带to 的情况：,常见动词有：一感：feel二听：listen to,hear三让: let, make, have四看: see, look at,watch, notice比较： I saw her crossing the street. I saw her cross the street.,3. 用作状语(adverbial)：,I went there to see my teacher. She came back to get her English book.The box was too heavy to move
4、.,(目的),(目的),（结果）,4.用作主语,1.To be an actress is my dream.,2. To go abroad is his dream.,3. To say is easy, to do is difficult.,（这时可将其用形式主语it来替换）,It is my dream to be an actress.,It is his dream to go abroad.,It is easy to say, it is difficult to do.,句 型,Its +adj+of sb+to do sth.Eg:你能邀请我，你真是太善良了。Its ve
5、ry kind of you to invit me.若形容词是描述人的性格、品质的，如kind，good，nice，right，wrong，clever，careless，polite，foolish等，用of sb.Eg:你真聪明，解出了这道数学题。 Its clever of you to work out the maths problem.,Its +adj+for sb+to do sth.若形容词是描述事物的性质，用for sb.这类形容词有difficult，easy，hard， important，dangerous，（im）possible等。 Eg:对孩子们来说，穿过繁忙
6、的街道很危险。Its very dangerous for children to cross the busy street. Eg:对我们来说，完成这项工作很困难。 Its difficult for us to finish the work.,5.用作表语,His work is to feed the animals.,Her job is to look after the patients.,My wish is to be a scientist.,6.用作定语,Give me something to drink.,They have much food to eat.,（这
7、时不定式与被修饰词有动宾关系。若是不及物动词，介词不能省略）,He asked for a room to live in.,I dont have a pen to write with.,7.疑问词who, what, which, where, when, how加to do可构成不定式短语，在句中可用作主语、宾语、宾语补足语、表语等。,When to start has not been decided.,I dont know what to do.,He can tell you where to get the book.,The question is who(m) to as
8、k.,(主语),(宾语),(宾语补足语),(表语),比较（Compare）,I dont know what to do.I dont know how to do it.I dont know what to do about it.,说出句子中的不定式，及在句中做什么成分：,It takes you ten minutes to get there.I hope to see him soon.His wish is to become an artist.People eat to live, but not live to eat.I have a lot to tell you.It
9、s not right to be always thinking of oneself.We often see him play football.,定语,主语,状语,表语,宾语,主语,宾语补足语,Exercise,跳舞非常有趣。种些植物是非常有必要的。说英语对我来说并不容易。听到你的声音真高兴。,To dance is a lot of fun.,It is a lot of fun to dance.,To grow plants is very important.,To hear your voice is so nice.,To speak English is not easy
10、 for me.,It is so nice to hear your voice.,Exercise,我的工作是每天打扫这间屋子。最上策的计划就是马上离开这儿。3 我的梦想就是成为一名科学家。,My work is to clean the room every day.,The best plan is to leave at once.,My dream is to be a scientist.,Exercise,他想借用我的录音机。他们开始读和写。李琳喜欢玩什么？她喜欢踢足球。你长大了想做什么？,He wants to borrow my radio.,They began to r
11、ead and write.,What sports does Li Lin like to play? She likes to play soccer.,What do you want to be when you grow up?,1 我有许多书要看。2 她有几个问题要问。3 他有一台电视要修。4. 我没什么可担心的。,I have many books to read.,She has a few questions to ask.,He has a TV set to repair.,I have nothing to worry about.,他是一个值得信赖的人。6 爱迪生是第
12、一个发明电灯的人。7 他那生病母亲最多可活三个月。,He is a man to believe in.,Edison was the first man to invent the lights.,His sick mother has three months to live at most.,They looked for him everywhere and found him _ under the tree.a. liesb. lyingc. layd. lain,考点：see/hear/find/watch sb. do sth. (看见某人做了某事）See/hear/find/
13、watch sb. doing sth. （看见某人正在做某事）,I saw him _ the supermarket just now.a. enteredb. enteringc. enterd. to enter,The girl who sold matches was found _ the next morning.a. dieb. dyingc. diedd. dead,-Do you remember _ me somewhere in Hangzhou?-Yes. I think thats 2 years ago.a. seeb. seeing c. to seed. s
14、aw,forget/remember to do sth. forget/remember doing sth. stop/go on to do sth stop/go on doing sth,The scientist stopped _ to me though he was busy.a. talkingb. to talkc. to have talk d. having talk,The more you think about it, the more questions you will think of _.a. askb. askedc. askingd. to ask,考点：to do 表示目的,The doctor did what he could _ that child.a. saveb. to savec. savedd. saving,I have no pen _.a. writing b. writing withc. to write withd. writing,to do 作定语， 如是不及物动词构成不定式短语作定语，其后需接介词,