1、Name Class Designer: Donnay 2018.3.28BOOK7 UNIT2 动词不定式 to do 用法与专练Learning aims: To get the students to review the usage of “to do” and apply it properly. 巧记动词不定式的用法 不定式有标记，to与动原连一起。 没有人称数变化，动词特点它具备。主宾定状表补语，唯独作谓不可以。 not加上不定式，否定结构要牢记。疑问词与不定式，构成短语有意义。 仔细推敲多思考，准确判断有依据。具体用法一、动词不定式的基本形式是(见课本)“不定式符号to+动词原
2、形”，有时可以不带to。例如： tosellflowersinthestreet 在街上卖花tospeakintheclassroom 在教室里讲话二、带疑问词的不定式短语 动词不定式前面可以带疑问代词what, which, who或疑问副词how, when, where, why等。这种结构起名词的作用，在句子里用作宾语、主语、表语等，或者单独使用。要注意的是，why后面的不定式不带to。例如：I dont know what to try next. （作宾语） Where to go is not decided yet.（作主语） 注意：单独使用时相当于一个特殊疑问句。 What
3、to do next?(=What will we / you do next?) Why go there?(=Why do we / you go there?)三、动词不定式的复合结构 动词不定式的复合结构是“for / of sb. to do sth.”，for / of引出不定式动作的逻辑主语。不定式复合结构的介词用for还是of，主要决定于前面形容词的性质。一般说来，of前面的形容词是careful, clever, foolish, good, kind, nice, wise等，既说明人的特性，又说明不定式动作的特性。for前面的形容词是dangerous, difficul
4、t, easy, hard, heavy, important, interesting, necessary等，一般说明不定式动作的特性，不说明人的特性。前面如果是名词用for。 例如：Its also probably a good idea for parents to allow teenagers to study in groups during the evening. Its kind of you to help me.不定式省to有四种情况：1、使役动词let,make,have等后接不定式。 例如： Lethimgo!Thebossmadethechildlaborswo
5、rkthewhole night.2、wouldrather,hadbetter后。例如： Youhadbetterstayathome.3、Why/Whynot后。例如： WhynothaveagoodrestonSunday? 4、感官动词see,watch,lookat,hear,listento,smell,feel,find，notice等后作宾语补足语，省to。例如： Isawhimdance. 注意：这些情况在被动语态中，不可省to.例如：Thechildlaborsweremadetoworkthewholenight.巩固练习： ( )1、He read the instru
6、ction to find out how _ the computer. A. use B. to use C. using D. uses ( )2、There are some dangerous fishes in this river, and Ive warned Jack _here. A. not to swim B .to not swim C. swim not to D. to swim not ( )3、The article said that he hoped _ drawing the picture soon. A. his son to finish B. t
7、o finish C. finish D. his son will finish( )4、Listen! Can you hear a baby _ ? A. cry B. to cry C. crying D. cries ( )5.“Dont always make Michael _ this or that. He is already a big boy, dear,” Bush said to his wife. A. do B. to do C. does D. did ( )6、Dont forget _ the letter. A. to send B. send C. s
8、ending ( )7、John was made _ the car for a week as a punishment. A. to wash B. washing C. wash ( )8、Thank you very much _ the present. A. to give me B. for giving me C. giving me ( )9、I have no paper. Could you give me a piece of paper _ ? A. to write in B. write in C. to write on ( )10、The teacher g
9、ot his students _ the top of the mountain. A. reach B. to reach C. reaching ( )11、If everyone makes a contribution to _ the environment, the world will become much more beautiful. A. protect B. protecting C. protected ( )12、Tracy cant play the match now. Please _ instead. A. have Lily do B. let Lily
10、 to do it C. make Lily to do it ( )13、We lock the door to keep the books _ . A. to be stolen B. from being stolen C. from stealing ( )14、On my way home, I stopped _ some food. A. buy B. to buy C. buying ( )15_ the project in time, the staff were working at weekends. A. Completing B. Having completed
11、 C. To have completed D. To complete ( )16. Nowadays people sometimes separate their waste to make it easier for it _ A. reusing B. reused C. reuses D. to be reused ( )17. He told us whether _ a picnic was still under discussion. A. to have B. having C. have D. had ( )18. -The last one _ pays the me
12、al. - Agreed! A. arrived B. arrives C. to arrive D. arriving ( )19. _, you need to give all you have and try your best. A. Being a winner B. To be a winner C. Be a winner D. Having been a winner ( )20. We are invited to a party _ in our club next Friday. A. to be held B. held C. being held D. holding