选修七英语动词不定式.pptx

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1、第1页/共38页不定式由“to+动词原形”构成,其否定形式是“not/never to do”,不定式可以带宾语或状语构成不定式短语,没有人称和数的变化,但有时态和语态的变化。不定式可以作主语、宾语、状语、表语和定语，但不能单独作谓语。不定式不定式第2页/共38页一一.结构结构:to do (否定否定)not/never to do 二.时态与语态主动语态主动语态被动语态被动语态一般式一般式进行式进行式完成式完成式完成进行式完成进行式不定式 to do to be done to be doing to have done to have been done to have been doin

2、g-第3页/共38页(1).They pretended not to see us.(2).He pretended to be sleeping.(3).She pretended to have known it before.(一般式表示与谓语的动作同时一般式表示与谓语的动作同时/几乎几乎/发生在发生在它之后它之后.).)(在谓语动词发生的同时在谓语动词发生的同时,不定式的动作也不定式的动作也正在进行正在进行)(完成式表示动作发生在谓语动作之前完成式表示动作发生在谓语动作之前)(4).Were happy to have been working with you.(完成进行式表示谓语

3、动作发生之前完成进行式表示谓语动作发生之前,不定式的动作一直在进行而且可能之后不定式的动作一直在进行而且可能之后也继续也继续)第4页/共38页1.作主语2.作宾语3.作宾语补足语4.作定语5.作状语6.作表语7.作独立成分8.与疑问词等连用第5页/共38页三.用法/功能To see is to believe.Its important to learn English well.(1).主语单个不定式作主语时单个不定式作主语时,谓语动词用单数谓语动词用单数若不定式太长若不定式太长,往往用往往用it it作形式主语作形式主语,不定式置后不定式置后.My job to help the pati

4、ent.Your task to clean the classroom.isis(2).表语第6页/共38页I want to go home.The workers demanded to get better pay.I found it necessary to talk to him again.(3)宾语think/consider/find it+adj.+to do 第7页/共38页The teacher told me to clean the blackboard.I expect you to give me some help.(4).宾补五看 watch see lo

5、ok at observe notice三使 let make have 二听 listen to hear一感觉:feelwarn,tell,allow,help,ask,force等第8页/共38页e.g.I made him do his work.He was made to do his work(by me).注意注意1 help 后面的“to”可省去e.g.They often help the grandma(to)carry water.2 see,hear,watch,feel,notice,look at等表示 感觉和let,make,have等表示使役的动词后 面，不定

6、式作宾语时要省“to”（注：被动 语态不省to）第9页/共38页3 不定式用在介词but,except,besides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).I have no choice but to go.(3).What do you like to do besides sleep.第10页/共38页I have something to say.He has a lot of homework to do.He is looking for a room to

7、live in.There is nothing to worry about.(5).定语(如果不定式中的动词是不及物动词,则不定式中要有介词.)请给我一支写字的笔.Please give me a pen to write with.第11页/共38页I came here to see you.He got up early to catch the train.(6)状语（表示目的或结果）in order to,so as to,enough to,only to,too.to.,在一些短语中也有体现第12页/共38页(7).独立结构to be frank,to be honest,T

8、o tell the truth,I dont agree with you.类似的结构第13页/共38页(8)(8)不定式与疑问词不定式与疑问词who,which,when,who,which,when,how,whathow,what等连用，在句中起名词作用，可等连用，在句中起名词作用，可充当主语、表语、宾语等。充当主语、表语、宾语等。He didnt know what to say.他不知道说什么。他不知道说什么。(宾语宾语)How to solve the problem is very important.如何解决这个问题很重要。如何解决这个问题很重要。(主语主语)My quest

9、ion is when to start.我的问题是什么我的问题是什么时候开始。时候开始。(表语表语)第14页/共38页关于不定式中的小品词to (1).不定式中的动词上文已出现过,下文要 省略该动词.eg:Would you like to go with me?Id like to.(2).不定式是to be 结构,be 不可省.eg:Would you like to be a teacher?Id like to be.第15页/共38页Summary 不定式顺口溜你：不定式顺口溜你：不定式，非谓语,具体动作有规律。作主语，作宾语,it 抢头作形式。作表语，作状语，表示任务和目的。省略

10、动词保留to,避免动词再重复。保留动词省略to,感听看让半帮忙。第16页/共38页第17页/共38页1.My teacher was made _ his teaching because of poor health.A.giving up B.to give up C.give up D.given up2.The Arctic is considered _ the northern part of the Atlantic.A.having been B.to have been C.to be D.being3.The Emperor ordered the wonderful cl

11、oth _ for him without delay.to have woven B.to be woven C.to be weaving D.to weave4.I found the German language hard _.learned B.learning C.to be learned D.to learn5.The light in the office is still on.-Oh,I forgot _.turning it off B.turn it off C.to turn it off D.having turned it off第18页/共38页1.My t

12、eacher was made _ his teaching because of poor health.A.giving up B.to give up C.give up D.given up2.The Arctic is considered _ the northern part of the Atlantic.A.having been B.to have beenC.to be D.being第19页/共38页3.The Emperor ordered the wonderful cloth _ for him without delay.A.to have woven B.to

13、 be wovenC.to be weaving D.to weave4.I found the German language hard _.A.learned B.learning C.to be learned D.to learn5.The light in the office is still on.-Oh,I forgot _.A.turning it off B.turn it offC.to turn it off D.having turned it off第20页/共38页6.-What do you think of the school?-It is a very g

14、ood _.A.school to study in B.school for children to studyC.studying school D.school to study7.-Did you get a job?-No,I _,but its no use.A.expected B.tried to C.managed to D.planned8.We find it impossible for the work _ ahead of time.A.to finish B.finishing C.being finished D.to be finished9.-I usual

15、ly go to Shanghai by train.-Why not _ there by boat for a change?to try to go B.try going C.to try going D.try to go 第21页/共38页6.-What do you think of the school?-It is a very good _.school to study in B.school for children to studyC.studying school D.school to study第22页/共38页7.-Did you get a job?-No,

16、I _,but its no use.A.expected B.tried to C.managed to D.planned8.We find it impossible for the work _ ahead of time.A.to finish B.finishing C.being finished D.to be finished9.-I usually go to Shanghai by train.-Why not _ there by boat for a change?A.to try to go B.try going C.to try going D.try to g

17、o 第23页/共38页10._ a living,she had to work from morning till night.A.To make B.MadeC.Making D.To have made11.I would rather starve to death than _ for food.A.beg B.begging C.begged D.to beg12.The boy pretended _ when his mother entered.A.reading B.to read C.to be reading D.being read第24页/共38页10._ a li

18、ving,she had to work from morning till night.A.To make B.MadeC.Making D.To have made11.I would rather starve to death than _ for food.A.beg B.begging C.begged D.to beg12.The boy pretended _ when his mother entered.A.reading B.to read C.to be reading D.being read第25页/共38页几对易混淆的词组：stop to do sth.停止去做某

19、事 doing sth.停止正在做forget to do sth.忘记去做 doing sth.忘记已做了remember to do sth.记得去做 doing sth.记得曾经做try to do sth.努力做某事 doing sth.尝试做某事第26页/共38页第27页/共38页1.Robert is said _ abroad,but I dont know what country he studied in.A.to have studied B.to study C.to be studying D.to have been studying2.The purpose of

20、 new technologies is to make life easier,_ it more difficult.A.not make B.not to make C.not making D.dont make3.Ive worked with children before,so I know what _ in my new job.A.expected B.to expect C.to be expecting D.expects第28页/共38页4.Having a trip abroad is certainly good for the old couple,but it

21、 remains _ whether they will enjoy it.A.to see B.to be seen C.seeing D.see5.It is said in Australia there is more land than the government knows _.A.it what to do with B.what to do with it C.what to do it with D.to do what with it6.The mother didnt know _ to blame for the broken glass as it happened

22、 while she was out.A.who B.when C.how D.why 第29页/共38页7.Paul doesnt have to be made _.He always works hard.A.learn B.to learn C.learned D.learning8.We agreed _ here but so far she hasnt turned up yet.A.having met B.meeting C.to meet D.to have met9.The boy wanted to ride his bicycle in the street,but

23、his mother told him _.A.not to B.not to do C.not do it D.do not to第30页/共38页10.The patient was warned _ oily food after the operation.A.to eat not B.eating not C.not to eat D.not eating11.I would love _ to the party last night but I had to work extra hours to finish a report.A.to go B.to have gone C.

24、going D.having gone12.Charles Babbage is generally considered _the first computer.A.to invent B.inventing C.to have invented D.having invented第31页/共38页13.Little Jim should love _ to the theatre this evening.A.to be taken B.to take C.being taken D.taking14._ late in the afternoon,Bob turned off the a

25、larm.A.To sleep B.Sleeping C.Sleep D.Having sleep15.The teacher asked us _ so much noise.A.dont make B.not make C.not making D.not to make第32页/共38页1爱和被爱都是最大的幸福。_ are both great happiness.2中国人民决不会征服。The Chinese people refuse _3据说他已经完成了他的工作。He is said _.4 根据报道他们已安全到达。They are reported _To love and to

26、be lovedto give in/be conqueredto have finished/completed his workto have arrived safely第33页/共38页5 我想叫人立刻修理这辆自行车。I want this bike _.6 玛利仿佛已经告诉这件事了。Mary seemed _.7众所周知，奥运会上他被授予了一枚金牌。He is known _ a gold medal at the Olympic.to be repaired at once/immediatelyto have been told about itto have been give

27、n第34页/共38页1.He was overheard to say that he hoped John would resign.2.Peter was made to wait outside.3.He was heard to unlock the door and go out.4.The man was seen to shoot the woman on the street.5.The old lady was noticed to wipe her face with a handkerchief.第35页/共38页I forgot to ask you to go to

28、the bank.It is very important to turn off the electricity before you check the machine.I know how to make a mouse out of my handkerchief.Luckily,we dont have much more work to do.She was very pleased to have the opportunity to travel while she was young.She has been very successful in her work,and n

29、ow her greatest wish is to get married and have a child.第36页/共38页1.started pushing/to push2.promised to go3.advise you to eat4.began shouting/to shout5.avoid falling 6.forget to call7.felt like throwing8.let them stay1.a.to tell b.spending2.a.putting b.to check3.a.talking b.to make c.to drink4.a.to get b.thinking第37页/共38页感谢您的观看！第38页/共38页