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1、The infinitive动词不定式,to do,not to do,作主语,to do 作主语，常放句尾，用it作形式主语,1. It be adj. n. to do sth.Its good to see you.,To see is to believe.,2. It takes sb. some time to do sth.,Its difficult to learn maths well.,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 fu
2、n to dance.,To grow plants is very important.,To hear your voice is so nice.,To speak English is not easy for me.,It is so nice to hear your voice.,作表语,To see is to believe.,他的愿望是成为一名医生。,His wish is to be a doctor.,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 e
3、very day.,The best plan is to leave at once.,My dream is to be a scientist.,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 try to doforget to do remember to
4、do like to dostop to dogo on to do,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 read 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?,作宾语补足语：(v. + sb. + to do ),She asked me to help h
5、er.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 sb to dohelp sb to do,他要求我再大声点儿。Lucy告诉他不要哭。吉姆告诉李明由衷地祝福每个人。他让我再做一次。,She asked me to speak louder.,Lucy told him not to cry.
6、,Jim told Li Ming to give his best wishes to everybody.,He let me do it again.,作宾语补足语不带to 的情况：,Let me do it.I saw him cross the street.常见动词有： 使役动词: let, make, have 感官动词: see, watch, hear, feel, listen to比较： I heard her singing in the next room. I heard her sing in the next room.,作状语 (adverbial)：,He
7、came to show me his new CD player.I went there to see my teacher. She came back to get her English book.The boy was too frightened to move.,(目的),(目的),(目的),(结果),I am glad to see you.,（原因）,Im sorry to trouble you.,（原因）,作定语,Have you get anything to say?,Hes looking for a room to live in?,She has no clo
8、thes to wear?,用作定语,Give me something to drink.,I have two books to read.,They have much food to eat.,（这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.,The ice is hard to skate on.,He bought a toy to play with.,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
9、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.,不定式与疑问词连用,常用动词有: ask know learn teach tell understand等。,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 ask.,
