情态动词(教案）

1、情态动词教学目标：1.通过复习巩固对常见情态动词的掌握 2.掌握情态动词的三个特征 3.掌握情态动词问答基本公式 4.辨析部分情态动词用法教学重点：常见情态动词的特征、用法和问答基本公式教学难点：情态动词用法辨析一、课前预习： 要求学生复习有关情态动词的知识点中考零距离P83-84二、课堂活动：I. 常见情态动词：情态动词本身有一定的意义，但不能独立作谓语，只能和主要动词一起构成谓语动词。表示说话人的语气和情感。常见的情态动词有：can (could) , may (might), shall (should), will (would), dare (dared) must , need,

2、have to , had better , ought to, II. 情态动词的三个特征：1. 情态动词和动词原形一起构成谓语。2. 直接构成否定句、疑问句3. 只有时态变化，没有人称和数的变化。III. 情态动词问答基本公式：1. A. Can I ? B: Yes, you can. No, you cant.2. A: May I? B: Yes, you may. No, you mustnt/cant/may not.3. A: Must I? B: Yes, you must./Im afraid you must. No, you neednt/dont have to.4.

3、 A: Need I? B: Yes, you must. No, you neednt.Ex:1. A: Must I get up early tomorrow, Dad? B: No, you _. Tomorrow is Sunday.A. mustn't B. can't C. needn't D. couldnt2. A: _ I have some chocolates now? B: No, you _. Its time for bed. You can have some tomorrow. A. May, mustnt B. Must, needn

4、t C. Must, mustnt D. May, neednt 3. A: _ you play basketball? B: No, I _. A. Can, may B. Can, cant C. May, cant D. Can, can4. A: _ I take it out? B: I'm sorry, you _. A. Could .couldn't B. Might.might not C. Could.can D. May.can't5.A: _ I take the newspaper away? B: No, you mustn't.

5、You_ read it only here.A. Must; can B. May; can C. Need; must D. Must; must6. A: Must we do our homework first? B: No, you_. You may have a rest first.A. mustn't B. needn't C. may not D. can'tIV. 情态动词用法辨析：1. can / could在表示请求允许的时候两者能互换, could比can语气更委婉。e.g. A. Can I help you?B. Could you o

6、pen the window?Ex:1. Could you tell me _?A. when will the meeting begin B. when the meeting will beginC. When would the meeting begin D. when the meeting would begin2. Can you tell me _ for the computer? A. how much did you pay B. how much you pay C. how much you paid D. how much paid you在表示有能力作某事时，

7、could是can的过去式。e.g. A. I can swim.B. I could swim at the age of five.2. must /have tomust 表示主观意愿，否定句用mustnt（不准，不许），否定回答用neednt（不必）e.g. A. I must go now.B. You mustnt play in the street.C. A: Must I clean the room now? B: No, you neednt.have to表示客观条件的限制的“不得不”，它有时态和人称变化，需要助动词来否定和疑问。have to的疑问形式是：助动词+主语

8、+have to，否定形式是：助动词+not + have to (相当于not have to)e.g. A. I dont have to / neednt carry the big box.B. He had to wash his clothes.C. Well have to leave now, for it is very late at night.D. Do you have to stay until 8 oclock?Ex：填空：1. Ive lost my bike, so I _ take the bus to school.2. You _ be careful

9、when you cross the road.3. My brother was very ill, so I _send him to the hospital last night.4. You _ study hard, or youll not pass the exam.5. The car didnt move. They _ get out of it to push it.6. We _ drink enough water every day.7. His glasses have been broken. Hell _buy another pair.8. The bus

10、 was too crowded. They_ walk there.9. In Our school every student _ wear the school uniform.10. Ive broken my left leg, so I _ stay in bed for a few days.选择：1. Come on! We _ hurry because there isn't much time left.A. may B. must C. can D. need2. You_ go and see a doctor at once because you'

11、re got a fever.A. can B. must C. dare D. would3. The children_ play football on the road.A. can't B. can C. mustn't D. must4. His arm is all right. He_ go and see the doctor.A. has not to B. don't have toC. haven't to D. doesn't have to5. He had to give up the plan, _ he?A. did B

12、. didn't C. does D. doesn't6. You _ do it even if you dont want to. A. cant B. mustnt C. neednt D. have to7. A: Must I take a bus? B: No, you _. You can walk from here. A. mustnt B. dont C. dont have to D. had better not to8. A: It is rather cold here. Shall we light a fire? B: No, we _, bec

13、ause things here are easy to catch fire. A. wont B. cant C. mustnt D. neednt3. may (相当于can)表示请求别人允许。May I use your bike?表示可能性。He may be a teacher. / He may live in this building. 注意： 表示肯定的猜测：must be 表示否定的猜测：cant be表示可能的猜测：may beEx: 1. Michael _ be a policeman, for he's much too short. A. needn&#

14、39;t B. can't C. shouldn't D. won't 2. I thought you _ be hungry, so I have brought you some cakes. A. may B. might C. can D. could3. You were stupid to climb the tree. You _ hurt yourself.A. may B. might C. will D. might have 4. All the lights are on, the Smiths _ up.A. must get B. is g

15、etting C. must be getting D. would get 5. John_ come to see us tonight, but he isn't very sure yet.A. may B. can C. has to D. must6. A: He_ be in the classroom, I think.B: No, he _ be in the classroom. I saw him go home a minute ago. A. can, may not B. must, may not C. may, can't D. may, mus

16、tn't7. Even the top students in our class can't work out this problem, so it _be very difficult.A. may B. must C. can D. need8. He isn't at school. I think he _ be ill.A. can B. shall C. must D. has to4. can/ be able tocan 只有现在时和过去时be able to 含强调经过努力之后能做（适用于更多时态）Ex:1. The fire spread thr

17、ough the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able to2. They _ do well in the exam.A. can be able to B. be able to C. can able to D. are able to3. He listened, but he _ hear nothing. A. can B. could C. able to D. be able to4. My brother is good at swimming. H

18、e _ swim much faster than his classmates. A. must B. need C. should D. can5. He was late for work because he _ catch the early bus. A. might not B. didnt have to C. wasnt able to D. didnt want to6. The young man asked whether he _ take the book out of the reading room. A. could B. might C. should D.

19、 would5. should/ ought to/ had better do sth.(可转换) 否定： should not do sth. ought not to do sth had better not do sth.Ex: 选择：1. He had better stay here, _ he?A. didn't B. don't C. hadn't D. isn't2. You'd better _ late next time.A. not to be B. not be C. won't be D. don't be

20、3. You_ ask that man over there. Maybe he knows the way. A. had better not to B. had not better C. had better D. had better not4. Be careful not to catch a flu. You _ keep yourself warm and have a healthy diet. A. can B. should C. may D. need5. You look so tired. You _to have a good rest. A. should

21、B. had better C. must D. ought6. You _ apologize to your mum for breaking the expensive vase. A. ought B. should C. can D. may句型转换：1. You should stop when you see the red light on. （保持句意不变） You _ _ stop when you see the red light on.2. My brother ought to wear his school uniform at school every day.

22、（改为反义疑问句） My brother ought to wear his school uniform at school every day, _ _?6. need的用法辨析 1) 作情态动词 need do sth. (否定) neednt do sth. 2) 作行为动词 (有时态，人称和数的变化) need to do sth. (否定) dont need to do sth. need sth. (否定) dont need sth.7. had better (do) sth. (否定) had better not (do) sth.e.g. A. Youd better

23、 sit here and say nothing.B. Youd better not speak because he is sleeping.Ex：1. A: Need we do this job now? B: Yes, _.A. you need B. you should C. you must D. you can2. A: Shall I get one more cake for you, Dad? B: Thanks, but you_, I've had enough.A. may not B. must not C. can't D. needn

24、9;t3. You _worry about your son. He will get well soon.A. needn't B. can't C. mustn't D. have to4. The poor man needs our help, _ he?A. need B. needn't C. does D. doesn't5. I dont think your friends_ worry about his health. I think he will be all right soon. A. needed B. needs C.

25、 need to D needs toV. 情态动词的被动语态：情态动词+be+过去分词Ex:1. Now many kinds of work _ (can do) by computers.2. We can store huge amounts of information in the computer.（改为被动语态） Huge amounts of information _ _stored in the computer. 3. We must keep the environment clean. （改为被动语态） The environment _ _ kept clean.

26、三、课堂小结： _四、回家作业：I. Fill in the blanks with proper modal verbs:1. Jim _ sing very well.2. Hello, _ I speak to Jim?3. _ we clean the classroom now? Yes, you _.4. We are students. We _work hard.5. _ I watch TV after supper?6. You _ eat or drink in class.7. A: _ I take this book out of the reading-room?

27、 B: No, you _.8.A: _ I return the book today? B: No, you _. You _ return it tomorrow.9. _ you lend me your dictionary for a minute?10. He listened, but he _ hear nothing.II. Choose the best answer:1. The light is on. They _ be at home. A. must B. can C. need D. could2. Jenny _ draw very beautiful pi

28、ctures. A. may B. need C. should D. can3. The H1N1 flu is really dangerous. You _ keep warm and have a healthy diet. A. can B. should C. may D. need4. A: She must be in the library now. B: No, she _ be there. I saw her in the office a minute ago. A. mustnt B. cant C. couldnt D. wouldnt5. You look so

29、 tired. You _to have a good rest. A. should B. had better C. must D. ought6. He was late for work because he _ catch the early train. A. might not B. didnt have to C. was not able to D. didnt fail to 7. You _ park your car in front of our shop. A. neednt B. mustnt C. oughtnt D. wont8. Im afraid I _

30、go now. Its so dark outside. A. can B. have to C. may D. need9. A: _ I borrow your dictionary, Tom? B: Certainly, but you _ return it next week. A. May, may B. Can, can C. May, must D. May, can 10. A: _ I book a table by phone? B: No, you _. You may also reserve it online. A. Must, mustnt B. Must, n

31、eednt C. Can, cant D. Can, needntIII. Rewrite the sentences as required:1. He can hardly find out the solution to the case. (改为反意疑问句) He can hardly find out the solution to the case, _ _?2. He woke up early in order to catch the early bus. (保持句意基本不变) He woke up early so that _ _ catch the early bus. 3. We must keep our classroom clean and tidy. (改为被动语态) Our classroom _ _ _clean. 4. We can collect a huge amounts of information from the Inte