高中英语 unit 2情态动词课件 牛津必修4

1、2021/8/11 星期三12.How many years can a mountain existBefore its washed to the sea?Yes, how many years can some people existBefore theyre allowed to be free?Yes, how many times can a man turn his head,Pretending he just doesnt see?The answer, my friend, is blowing in the wind,The answer is blowing in t

2、he wind.Blowing in the Wind3.How many times must a man look upBefore he can see the sky?Yes, how many ears must one man haveBefore he can hear people cry?Yes, how many deaths will it take till he knowsThat too many people have died?The answer, my friend, is blowing in the wind,The answer is blowing

3、in the wind. 1How many roads must a man walk downBefore you call him a man?how many seas must a white dove sailBefore she sleeps in the sand?Yes, how many times must the cannon balls flyBefore theyre forever banned?The answer, my friend, is blowing in the wind,The answer is blowing in the wind.2021/

4、8/11 星期三2GrammarModal verbs2021/8/11 星期三3Self-study2021/8/11 星期三4can couldmay mightshall shouldmust will wouldought tohave to dare (darent)need (neednt) used tomodal verbs1. How many modal verbs do you know?2021/8/11 星期三5只作情态动词的可情态可实义的可情态可助动词的相当于情态动词的can/could, may/might, ought to， mustneed, dare/da

5、redshall/should, will/wouldhave to, used to2021/8/11 星期三62. Whats the definition of modal verbs?情态动词是一种本身有一定的词义,表示说话人的情绪,态度或语气的动词,但不能单独作谓语, 只能和其他动词原形构成谓语。 2021/8/11 星期三73.What are the functions of modal verbs?1.To talk about _2. To talk about _3. To talk about_4. To talk about _abilityobligationcert

6、aintypermission2021/8/11 星期三85. To make_ 6. To make _7. To make_8. To give _requestssuggestionsoffersadvice2021/8/11 星期三92. Read Part A on page 31, and then complete the passage.Answers (1) can (2) dare (3) can/could (4) may/might/could(5) mustnt/shouldnt/cant (6) mustnt/shouldnt/cant (7) can (8) ne

7、ednt2021/8/11 星期三10group-study2021/8/11 星期三111. Talk about ability: can, could 和be able to的用法She can/be able to sing the song in English.This machine can make you feel comfortable.1.can, be able to都可表示“能力”Can的主语是人或物,be able to的主语是人 Well be able to finish the work soon.I havent been able to see the f

8、ilm.2.can只用于现在时和过去时(could)。beableto可以用于各种时态。 3.could用于表示泛指过去的能力。如： IcouldreadwhenIwasfour. 2021/8/11 星期三124.表示特定的某一过去能力或表示成功地做了某事时，只能用was/wereableto，不能用could。 He_fleeEuropebeforethewarbrokeout. Note：was able to2021/8/11 星期三13 2. To talk about obligationought to/should have to must*have to 能用于各种时态,且有

9、人称和数的变化. ought to 的否定式为ought not to/oughtnt to强2021/8/11 星期三14 should & ought toShould&ought to含义相近，都可表“责任，义务”常可互换。区别在于，ought to常指特殊情况下的“应当”。Should则指一般情况。You ought to help him because he is in trouble now.(语气强，有命令意味。)You should have a rest after finishing your sports.（一般性建议）You ought to call the pol

10、ice when you find something wrong in your house. He should take care of the babies tonight.2021/8/11 星期三15*情态动词should一般不应被认为是情态动词 shall的过去式，主要用法有：1)用于第一人称疑问句中询问对方的意愿，但语气较委婉温和，如：What should we do now? 我们现在该怎么办？2)表示应该、必须，常与must 换用。例如：We should (must) master a foreign language at least.3)用于虚拟语气:It is s

11、uggested that he (should) be sent there at once.It is strange that he should say so.I m surprised that he should eat so little every.2021/8/11 星期三16 must表主观意志，而have to表由于客观因素不得不做完成的事情。Must没有过去式，除在间接引语中可表示过去的时间。在直接引语中表示过去的时间用had to代替。I told her that she must give up smoking.比较must & have toIts gettin

12、g late. I have to leave now.（客观需要）2021/8/11 星期三17 3. To talk about uncertaintymight may should ought to will must强2021/8/11 星期三182.情态动词的重要用法.肯定的推测可能的推测否定的推测疑问的推测must 对将来 对现在 对过去情态动词may, might cant, couldntcan, could + V. + V. + have done常见must be + be doing + V. + V. + have done + be doing 可以用not表示“

13、可能不” +V. + V. + have done + be doing+ V. + V. + have done + be doing2021/8/11 星期三19 1. I dont know where she is, she _ be in Wuhan. 2. At this moment, our teacher _ our exam papers. 这时，我们老师想必在批改试卷。 3. The road is wet. It _ last night. (rain) 4. Your mother _ for you.你妈妈一定一直在找你。 maymust be markingmus

14、t have rainedmust have been looking2021/8/11 星期三205. Philip _ seriously in the car accident. 菲利普可能在车祸中受了重伤.6. Linda has gone to work, but her bicycle is still here.She _ (go) by bus.7. Mike _ his car, for he came to work by bus this morning.迈克一定还没有找回他的车，因为早上他是坐 公共汽车来上班的。may (might) have been hurtmay

15、 (might) have gonecant have found2021/8/11 星期三21高考考题:1. I thought you _like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have lost C. should have lost D. must have lost3. I didnt hear the phone. I _asleep A. m

16、ust be B. must have been C. should be D. should have beenB D B 2021/8/11 星期三224. There were already five people in the car, but they managed to take me as well. It _a comfortable journey A. cant be B. shouldnt be C. mustnt have been D. couldnt have been 5. Its nearly seven oclock . Jack _be here at

17、any moment. A. must B. need C. should D. could D D 2021/8/11 星期三23may / might, can / could * might, could 比较委婉, 一般多用于疑问句.* can, may 表达的语言比较随便.* 在以could, might 表示征询对方意见 或表示请求时，回答应相应使用can, may.4. To talk about permission2021/8/11 星期三24四、熟悉情态动词委婉用法： could, would, might等情态动词均有委婉用法，它们不是过去式而是表示语气委婉、客气、礼貌，

18、常用与疑问句，并多用于习惯表达， 如would you please, would you mind, would you like to等，might还可以用于肯定句表示推测，表示可能性小， might和could表示征求对方意见时，回答必须还成may, can.2021/8/11 星期三25例1：-Could I borrow your dictionary?Yes, of course you_.A. mightB. will C. canD. should析：选C。该句用can的委婉表达式could 来征求对方意见，could 和might通用，但回答时必须还成can或may，因此该题

19、不选A.2021/8/11 星期三26例2：_you mind my smoking here?A. ShouldB Could C. MightD. Would析：选D。征求对方意见我是否在这儿吸烟，语气理应委婉，所以应选委婉的表达方式would you mind来征求对方意见。2021/8/11 星期三27will can could would 5. To make requests6. To make suggestions（）Shall we do some exercise this morning?7. To make offers（）8. To give advice（）Sha

20、ll I get a ticket for you?You should not/ought not to eat a lot before swimming.BAC2021/8/11 星期三28 Notice !2021/8/11 星期三291.可兼做行为动词的情态动词：need 、 dare 情态动词 (+动词原形)行为动词 .needdare 1.无人称和数的变化; 2.尤其用于：*否定句及疑问句中;*在if/whether之后;*或与hardly, never, no one, nobody连用; 3.常以neednt 和darent 的形式出现;4.dare有其过去时dared. 多

21、用于肯定句; need to do dare to doneed to be done need doing 2021/8/11 星期三301.判断正误: How dare you say such a thing? How dare you to say such a thing?He darent to speak English before such a crowd, did he?He darent speak English before such a crowd, dare he?Exercises2021/8/11 星期三31Nobody need to be afraid o

22、f catching the disease.Nobody need be afraid of catching the disease.These dishes need be cleaned carefully.These dishes need to be cleaned carefully.These dishes need cleaning carefully.2021/8/11 星期三32Note: 对need问句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.you mustyou needntyou dont

23、have to2021/8/11 星期三33neednt 对其它情态动词的回答: -Shall I tell John about it? -No, you _. -Must we do it now? -No, you _. neednt (dont have to) neednt(dont have to)2021/8/11 星期三342.情态动词：shall, will 的多种意义: * shall 可表示必须、允诺、命令、 警告或征询意见. * 均可表示将来。 过去时为 should, would.1.Shall we /he/she turn on the project today

24、?2.You shall get what you want if you come here.3.He shall go first , whether he wants of not.4.The fine shall be paid in cash.5.If you dont behave yourself, you shall be punished.许诺征求建议命令强制威胁2021/8/11 星期三35* will 可表示意愿、决心或决定、常出现的动作、在疑问句中表示请求和建议.If you will take off your clothes, we will try the new

25、 clothes on you in front of the mirror.Will /Would you please turn down the TV?Whenever he meets me, he will come over and say hello to me.Fish will die without water.意愿请求习惯性动作必然性2021/8/11 星期三361. He _ be punished if he disobeys. 如果他不服从, 就要受到惩罚.2. We are not going to quarrel at all if you _ only let

26、 me speak. 只要你让我说话, 我们根本就不会吵架.3. -Sir, _ he go or stay? -Let him go. A. will B. shall C. might D. couldshallwillB 2021/8/11 星期三374. The door _ open. 这门经常打不开.5. Ronald _ stay in his small garden for a long time every day in the past. A. could B. might C. should D. would6. You _ have the book after I

27、read it. 我看完以后一定把这本书给你.wontD shall2021/8/11 星期三383. 表示否定的情态动词的用法: 部分情态动词的否定式是情态动词中的考点之一。 mustnt 不准, 禁止 neednt 没必要 ( = dont have to )cant 不能; 不可能may not 不可以; 可能不shouldnt 不应该 ( = ought not to )2021/8/11 星期三391. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C.

28、 neednt D. may not2. Johnny, you _ play with the knife, you _ hurt yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldntC B 2021/8/11 星期三403. -Will you stay for lunch? -Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont4. -May I pick a flow

29、er in the garden? - _. A. No, you neednt B. Not, please. C. No, you mustnt D. No, you wontB C 2021/8/11 星期三414. Must表推测时的反义疑问句 He must be in the classroom, isnt he?He must like dogs, doesnt he?He must have watered the flowers, hasnt he?He must have watered the flowers last night, didnt he?2021/8/11

30、星期三42一. must表示推测 ，其疑问部分必须与must 后面的主要动词相呼应 二. A.句中陈述部分没有表示过去的时间状语，这时疑问部分中的动词就用 现在完成时 B. 陈述部分有表示过去的时间状语，疑问部分的动词就用 一般过去时。 Conclusion:2021/8/11 星期三435. 情态动词+have done 有哪些：2. 分类：a, 表推测： b, 表本来可以：should have done/ ought to have doneneed have done/ would have donemight/may have done/must have donecould hav

31、e done2021/8/11 星期三441. Sorry Im late. I _ have turned off the alarm clock and gone back to sleep again. （2000 北京春季）A. might B. should C. can D. will A2021/8/11 星期三45 2. I was really anxious about you. You_ home without a word. （01 全国）A. mustnt leave B. shouldnt have left C. couldnt have left D. nee

32、dnt leaveB2021/8/11 星期三463. Ill tell Mary about her new job tomorrow. You_ her last week. （04 福建）Aought to tell Bwould have told Cmust tell Dshould have toldD2021/8/11 星期三474. Tom graduated from college at a very young age. Oh, he _ have been a very smart boy then. （04 全国IV） A. could B. should C. mi

33、ght D. mustD2021/8/11 星期三486. Would与used to 的区别would表过去反复发生得动作或某种倾向“总是,总要”usedto表过去常常（现在已没有这种习惯）“过去常常”usedto可于状态动词连用would不可以eg.Heusedtobeaquietboy.() Hewouldbeaquietboy.()2021/8/11 星期三493. Read Part B on page 31, and then complete the passage.Answers(1) Shall (2) shall (3) will (4) will/shall(5) will (6) will/shall (7) shall/will2021/8/11 星期三50Say something to encourage the students in Wen Chuan using some modal verbs.