人教版高一英語(yǔ)必修三Unit2情態(tài)動(dòng)詞grammarppt課件

1、GrammarModal Modal VerbVerb 情態(tài)動(dòng)詞有一定的意義，但沒(méi)有人稱和情態(tài)動(dòng)詞有一定的意義，但沒(méi)有人稱和數(shù)的變化，不能獨(dú)立使用，它和后面的動(dòng)詞數(shù)的變化，不能獨(dú)立使用，它和后面的動(dòng)詞構(gòu)成謂語(yǔ)除構(gòu)成謂語(yǔ)除ought 和和have 外，后面只能接外，后面只能接不帶不帶to 的不定式。的不定式。 只作情態(tài)動(dòng)詞的只作情態(tài)動(dòng)詞的 can / could, may / might, ought to, must 可情態(tài)可實(shí)義的可情態(tài)可實(shí)義的need, dare 可情態(tài)可助動(dòng)詞的可情態(tài)可助動(dòng)詞的 shall / should, will / would相當(dāng)于情態(tài)動(dòng)詞的相當(dāng)于情態(tài)動(dòng)詞的 ha

2、ve to, used toEveryone here can speak English.-Could I have a look at your notebook?-Yes, you can. / No, you cant. It cant be Mary. She has fallen ill.Can this news be true?Where can they be?She cant have left school, for her bike is still here.The monkeys look sweet, but they can be very naughty.Sh

3、e can / is able to sing the song in English.I could read when I was four. The fire spread through the hotel quickly but everyone was able to get out.情態(tài)動(dòng)詞情態(tài)動(dòng)詞 含義含義否定式否定式 注意點(diǎn)注意點(diǎn)can / could表能力表能力“能，會(huì)能，會(huì)”cant“不會(huì)，不能不會(huì)，不能”區(qū)別區(qū)別 be able to表許可表許可“可以可以”cant “不可以，不許不可以，不許”代替代替may表推測(cè)表推測(cè)“可能可能”cant “不可能不可能”主要用于主要

4、用于否定、否定、疑問(wèn)句疑問(wèn)句中中1表示某人通過(guò)努力克服困難做成某事表示某人通過(guò)努力克服困難做成某事,要用要用was / were able to.2 could, might, would 表委婉語(yǔ)氣用于疑問(wèn)句表委婉語(yǔ)氣用于疑問(wèn)句, 答語(yǔ)仍須用答語(yǔ)仍須用 can, may, will.3 can 用于肯定句中用于肯定句中, 可表示有時(shí)可能可表示有時(shí)可能”-May I use your pencil?-Yes, you may. / No, you mustnt.She may not be working now. John might be at home now.Helen may go

5、on the trip with us, but she isnt very sure yet.She may / might have read it in the paper.He may not have finished reading the book.情態(tài)動(dòng)詞情態(tài)動(dòng)詞 含義含義否定式否定式 注注 意意 點(diǎn)點(diǎn)may /might表許可表許可“可以可以”mustnt “不許，嚴(yán)禁不許，嚴(yán)禁”口語(yǔ)中也可用口語(yǔ)中也可用cant表推測(cè)表推測(cè)“可能可能”May not“可能不可能不”主要主要用于用于肯定肯定句，句，不不能用在能用在疑問(wèn)疑問(wèn)句句 （may not 可能不）可能不）If you w

6、ill help me with my English, I will be very happy. I promised that I would do my best.Will you tell me something about your hometown? Would you please speak again more slowly？He will always take a walk after supper. During the vacation he would often visit me. 情態(tài)動(dòng)詞情態(tài)動(dòng)詞 用用 法法will表請(qǐng)求表請(qǐng)求(第二人稱第二人稱)表意志表意

7、志,意愿意愿表某種傾向表某種傾向或習(xí)慣或習(xí)慣would更客氣的更客氣的請(qǐng)求請(qǐng)求過(guò)去的過(guò)去的意志意志,意意愿愿過(guò)去的傾向過(guò)去的傾向或習(xí)慣或習(xí)慣Shall we set off now? You shall do as I say.Tell him that he shall have the book tomorrow. You shall be punished if you do that again.You shouldnt /oughtnt to smoke so much.She shouldnt have left without saying a word.Its five ocl

8、ock. John should be at home now. We have prepared a fridge of food and drinks. That ought to be enough for the party.Its a pity that he should be so rude to a lady.情態(tài)動(dòng)詞情態(tài)動(dòng)詞 用用 法法shall征求對(duì)方意見(jiàn)征求對(duì)方意見(jiàn)(第一第一, 三人稱三人稱)表示命令表示命令,警告警告, 威脅或威脅或允諾允諾 (第二第二, 三人稱三人稱) should / ought to表示勸告表示勸告,建議建議,命令或責(zé)任命令或責(zé)任“應(yīng)該應(yīng)該, 必須

9、必須”表示推測(cè)表示推測(cè), “理應(yīng)理應(yīng), 估估計(jì)計(jì), 大概大概, 可望可望”should 還可還可表示表示“竟然竟然”- Must I finish all assignments at a time?-Yes, you must. / No, you neednt. I dont like this TV set. We must buy a new one. There was no more bus. They had to walk home.You must be the new teacher. There is nobody here. They must have all gon

10、e home.My MP4 isnt in my bag. Where can I have put it?John, look at the time. Must you play the piano at such a late hour?情態(tài)動(dòng)詞情態(tài)動(dòng)詞 含義含義否定式否定式注意點(diǎn)注意點(diǎn)must表必要表必要“必須必須”neednt“不必不必”( 區(qū)別區(qū)別 have to)有時(shí)表有時(shí)表“偏要偏要”表推測(cè)表推測(cè)“一定一定” cant“不可能不可能”只能只能用于用于肯定肯定句，句，不能不能用于用于否定、疑問(wèn)句否定、疑問(wèn)句1. A computer _ think for itself; it

11、must be told what to do. A. cant B. couldnt C. may not D. might not2. The fire spread through the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able toA D 4. That big cinema _ seat 2,000 people.A. can B. should C. ought to D. is able toA 5. Could I borrow your diction

12、ary? Yes, of course you _. A. might B. will C. can D. should6. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. canC A 7. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C. neednt D. may not8. Johnny, you _ play with the knife, you _ hurt

13、 yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldntC B 9. -Will you stay for lunch? -Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont10. -May I pick a flower in the garden? - _. A. No, you neednt B. Not, please. C. No, you mustnt D. No

14、, you wontB C 11. Put on more clothes. You be feeling cold with only a shirt on. A. can B. could C. must D. would12. Must I drive to his house and pick up the children? No, . A. you shouldnt B. you might not C. you neednt D. you mustntC C 13. We didnt see Tom at the meeting yesterday. He it. A. must

15、nt have attended B. cannot have attended C. neednt have attended D. would have not attended14. We play chess than bridge. Some of us dont know how to play bridge. A. had better B. would better C. would rather D. had ratherB A 15. There is someone knocking at the door. it be Tom? A. Can B. Must C. Sh

16、ould D. Ought to16. Two year ago, my husband bought me a bicycle. If you live in town, it is often faster than a car and you worry about parking. A. must not B. may not C. should not D. dont have toA D 17.-Is John coming by train? -He should, but he _ not. He likes driving his car. A. must B. can C.

17、 need D. may19.-I heard they went skiing in the mountains last winter. -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt beDC全國(guó)高考試題回放1.A left-luggage office is a place where bags _be left for a short time, especially at a railway station.A.should B.can

18、C.must D.will2.How _ you say that you really understand the whole story if you have covered only part of the article?A.can B.must C.need D.may3.The room is so dirty._ we clean it? Of course.A.Will B.Shall C.Would D.DoBAB4.My English-Chinese dictionary has disappeared. Who _ have taken it?A.should B.

19、must C.could D.would5.Is John coming by train?He should, but he _ not. He likes driving his car.A.must B.can C.need D. may6.I heard they went skiing in the mountains last winter.-It _ true because there was little snow there.A.may not be B.wont beC.couldt be D. mustnt beCDC10.I was really anxious ab

20、out you. You _ home without a word.A. mustnt leave B. shouldnt have leftC. couldnt have left D. neednt leave11.You cant imagine that a well-behaved gentlemen _ be so rude to a lady.A.might B.need C.should D.would12.Write to me when you get home. _.A.I must B.I should C.I will D.I canBCC13.Mr.Bush is

21、 on time for everything. How _it be that he was late for the opening ceremony?A.can B.should C.may D.must14.Are you coming to Jeffs party?Im not sure. I _ go to the concert instead.A.must B.would C.should D.might15.My sister met him at the Grand Theatre yesterday afternoon, so he _ your lecture.A. c

22、ouldnt have attended B. neednt have attendedC. mustnt have attended D. shouldnt have attendedADA16.Sorry, Im late. I _ have turned off the alarm clock and gone back to sleep again.A.might B.should C.can D.will17.There was a lot of fun at yesterdays party. You _ come, but why didnt you?A.must have B.

23、should C.need have D.ought to have18.When can I come for the photos? I need them tomorrow afternoon.They _ be ready by by 12:00.A.can B.should C.might D.needADB19.I stayed at a hotel while in New York.-Oh, did you? You _ with Barbara.A.could have stayed B.could stayC.would stay D.must have stayed20.

24、The fire spread through the hotel very quickly but everyone _ get out.A.had to B.would C.was able to D.could21.Jack _ yet, otherwise he would have telephoned me.A. mustnt have arrived B. shouldnt have arrivedC.cant have arrived D. neednt have arrivedA CC22.When he was there, he _ go to that coffee s

25、hop at the corner after work everyday.A.would B.should C.had better D.might23.Sir, you _ be sitting in this waiting room. It is for woman and children only.A. oughtnt to B.cant C.wont D. neednt24.Its nearly seven oclock. Jack _ be here at any moment.A.must B.need C.should D.canAAC25.I told Sally how

26、 to get here, but perhaps I _ for her.A.had to write it out B. must have written it outC.should have written it out D.ought to write it out26.Michael _ be a policeman, for he is much too short.A. neednt B.cant C.should D.mayCBDiscovering useful structures Ex. 1: 1. Most ancient festivals would celebrate the end of cold weather