情态动词妙用

1、2012届高三情态动词讲义 一、情态动词的推测用法考点1. must , can ,could, may , might 表推测的区别A wolf and seven lambsThe mother sheep goes to the forest .Several minutes later the wolf comes and knocks at the door.Lamb1: Listen. Someone is knocking at the door. Who _ it be?Lamb6: It _ be Mummy but I am not sure. Lamb 7: It _ b

2、e Mummy. Lets open the door .Lamb 2: It _ be Mummy. She cant come back in such a short time.Lamb 1(shout in a loud voice): Who is it ?Wolf: It is mommy. I forgot something. Please open the door.Lamb1: You _ be mommy. Her voice is always sweet but you sound so hoarse. You _ be lying.Wolf: I have just

3、 had a bad cold.Lamb1: Let me see your hands.(The wolf reaches out his hands)Lamb2: Gosh! They are so dark! How _ they be moms hands. My mothers hands are extremely white.总结：_考点2：对现在的推测和过去的Mom: The ground is wet. It _(rain) last night.Son: Then what?Mom: So it _(be) slippery outside. Do be careful w

4、hile riding.Son: I am not a little boy now. Bye-bye.Mom: Wait a minute. It may rain in the afternoon. Youd better take the raincoat with you.Son: I have to hurry . My deskmate _(wait) for me now.归纳：must/can/may/might have done 表示对_的推测 must/can/may/might do 表示对_的推测 must/can/may/might be doing表示对_的推测【

5、巩固练习】1. It _ _(be)Tom that parked the car here, as he is the only one with a car. 2.Good morning. Ive got an appointment with Miss Smith in the Personnel Department.Ah, good morning. You _ (be) Mrs. Peters.3. She _ (not leave) school, for her bike is still here. 4. I didnt hear the phone. I _(be) as

6、leep. 5. I cant find my purse anywhere. You _ (lose) it while shopping. 6. She looks very happy. She _ （pass） the exam. I guess so. Its not difficult after all. 7. Tom _(play) basketball on the play ground now for I saw him in the library a moment ago.考点3：can 用在肯定句表“有时会, 可能会”与 must表推测用法的区别比较：a. Taki

7、ng the bullet train can be dangerous.b. Look. A bullet train has fallen off the track. An accident must have happened.【巩固练习】1. a. Accidents _ happen to any drunken driver.b. A driver is sleeping in the car which is parked in the middle of the road. He _be a drunken driver. 2. a. Jeff won the first p

8、rize again in the maths contest. He _ be a very clever boy. b. Jeff is a very clever boy, but he _ be very dull sometimes.3. It is usually warm in my hometown in March, but it _ be rather cold sometime. A. must B. can C. should D. would4. The World Wide Web is sometimes jokingly called the World Wid

9、e Wait because it _be very slow. A can B. should C. must D. will 考点4 should/ ought to 表推测 She promised to come by 10. But she may be late since the road is very crowded these days. She promised to come by 10. She should be here at any moment. (表估计，预期的事，常译为“按道理应该”)【巩固练习】1.When can I come for the phot

10、os? I need them tomorrow afternoon. They _ be ready by 12:00. A. can B. should C. might D. need2. There _ be any difficulty about passing the road test since you have practiced a lot in the driving school.A. mustnt B. shant C. shouldnt D. neednt3. The soccer team has been doing well this season, so

11、they _ win the championship. A. should B. might C. would D. could二、表示请求、允许、许诺 考点一、 may/might, can/could, will/would , shall 提出建议，请求对方许可 _ we wait outside?_ you wait outside? _ he wait outside?【巩固练习】1. I take the book out? I'm afraid not.A. Will B. May C. Must D. Need 2. You park here! Its an eme

12、rgency exit.A. wouldnt B. neednt C. couldnt D. mustnt3. Could I use your phone? Yes, of course you _. A. can B. could C. must D. shall4. May I take this book out of the reading room? No, you _. You read it in here. (2010陕西卷) Amightn't Bwon't Cneedn't Dmustn't5. _ he come to see you?

13、- Of course, please. And Id rather he told me the truth. A. Will B. Shall C. Would D. Do6. -Whats the name? - Khulaif. _I spell that for you. A. Shall B. Would C. Can D. Might7. Mr.Smith, _ he have all these letters typed for you right now? He _. They should be ready by 10 oclock this morning. A. wi

14、ll; must B. shall; has to C. need; will D. would; ought to考点二、Shall 用于二、三人称，表示保证、承诺、威胁、警告 或规定You shall be punished if you insist on doing it this way.If he passes the exam he shall have a holiday.The law shall come into effect on May 1st.【巩固练习】1- Excuse me, but I want to use your computer to type a

15、report. - You have my computer if you don't take care of it. A. shan't B. might not C. needn't D. shouldn't 2. I havent got the reference book yet, but Ill have a test on the subject next month.Dont worry. You _ have it by Friday. (2010江苏卷) A. could B. shall C. must D. may3.-Dont for

16、get to take your cell phone.-But its just been announced that no students _ bring cell phone. A. shall B. may C. can D. will4What does the sign over there read?No person _ smoke or carry a lighted cigarette in this area. Awill Bshall Cmay Dmust5.“Attention，please.Whoever can answer one of my questio

17、ns _receive a prize，” the teacher said in class.Amight Bshall Cshould Dwould6. Mum，would you please buy me an MP5 player?If you can help do the dishes the whole vacation，you _have one as a reward.Amust Bneed Cwould Dshall三、表必要性考点1 must & have toMust we hand in our exercises today?Yes，you must.是的

18、，必须交。(肯定回答)No，you neednt (you dont have to)不，May I smoke here ? No, you mustnt.(考点2 need 翻译： 你没有必要工作到那么晚 you dont have to work so late. You dont need to work so late You neednt work so late.比较：Did you work very late last night? No, I didnt. I didnt need to because I had finished all the assignments.

19、 Did you work very late last night? Yes. I had to prepare for the English test. You neednt have worked late last night because the English test has been cancelled.【巩固练习】-It was Sunday today, and I _ up very early. -So you really had a good rest.A. didnt need to get B. neednt have got C. neednt to ge

20、t D. dont need get考点3 must .表示偏要， 偏偏（做或发生不愉快的事情） Must you worry her with questions, just when she is busy cooking dinner? Just when we are ready to go away for the holidays, the baby must catch a cold.【巩固练习】1Look at the floor, Tom！_you watch TV while having a meal?AShould BCouldCWould DMust2. I have

21、 told you the truth. _ I keep repeating it?AMust BCan CMay DWill3.If you _ smoke, please go outside because this is a non-smoking office.A. mustB. shouldC. canD. may4.If you _ talk about it with me, please wait till I finish my work at hand.A、can B、may C、must D、should考点 4 should / ought to 表示义务，职责等

22、Should have done / ought to have done 本应该做的事 没做I think todays children should really learn to respect their elders.Humans ought to stop polluting nature.You ought not to be late for such an important. 【巩固练习】1. 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 have2. Look! Tom is too sleepy to workHe _ up watching TVAmustn't have stayed Bshouldn't have stayedCmustn't stay Dought not to say五、表习惯性或特性 考点1 will /would used to美文欣赏Every time I see a girl playing with her father, I will think of my father and the days

24、 I spent with him. Every Sunday morning, we would go for a drive. Daddy would get into the car and turn the key. Inevitably（不可避免地）, nothing would happen. He would push every button on the dashboard, but the car still wouldnt start. At last he would sigh and say to me, “Honey, the car just wont start until you give me a kiss.” So I did, and it did, and off we went. For a long time I believed there was some kind of connection between kissing and car starting.【巩固练习】1.Oil will float on the water.2. Every time Big Big wolf fa