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1、 can and could may and might will and would shall and should must and cant ks5u精品课件 He can take part in the Olympics. He may win the golden medal. To win it, he must run faster. ks5u精品课件 He can He may/might He must ks5u精品课件 Can Could ks5u精品课件 So he can carry heavy books. He couldnt open the door by
2、himself. Could you open the door, please? ability ability request ks5u精品课件 1) 表示能力（ability），指有能力做某事 ，意为“能够”。例如： 注意：表示现在，将来“能够”可用be able to 替换。表示 过去“能够”并成功了只能用was/ were able to, 不能用could 。例如 My grandma is over eighty, but she can/ is able to read without glasses. We can/ will be able to talk about th
3、e matter later. I talked with her for a long time, and at last I was able to make her believe me.(不能用 could) can 和could： ks5u精品课件 2) 表示请求（request）或（permission ）。意为“可否”、“可以”。 Could 比 can 更有礼貌，在此不是can的过去式。 Can you wait a moment please? Liz, can you do me a favor? Excuse me, could you tell me the way t
4、o the station? I wonder if you could help me. (request) ks5u精品课件 - Could I use your phone? -Yes, of course. You can. Do you think I could borrow your bike? (permission) 3) 表示可能性（possibility） a. can 表示泛指的“可能”，并非说话者 主观认为的可能性，即并非说话者的主 观猜测。 Accident can happen to any drunken driver. ks5u精品课件 b.表示说话者主观猜测
5、，只能用与 否定句或疑问句中。例如： It cant be my father. He is now in England. -Can it rain tomorrow? -No, it cant. ks5u精品课件 may might ks5u精品课件 He may be in his office. =( perhaps he is in his office.) He might be having lunch. =( perhaps he is having lunch.) ks5u精品课件 may 和might ： 1） 表示可能性（possibility）,用于 对现在，过去或将来
6、的推测，暗示 不确定。might 不是may的过去式 ，它所表示的可能性比may 小，含 较多的怀疑。 He may be very busy now. (可能性 较大) He might be very busy now. (可能 性较小) ks5u精品课件 2） 表示许可（permission），表示允许 别人做某事， 也可征求对方的许可。 He may go now. We may keep the book for two weeks. 3） 用于祈使句，表示祝愿。 May you succeed! May you have a nice trip! ks5u精品课件 1. They
7、(can/might) _be away for the weekend but Im not sure. 2. You (may/might) _leave now if you wish. 3. (could/may) _you open the window a bit, please? 4. He (can/could) _be from America, judging by his accent. 5. (may/can) _you swim? 6. Listen, please. You (may not/might not) _ speak during this exam.
8、May, might, can, could might may could could Can may not 表示猜测 表示许可 表示请求 表示猜测 表示能力 表示不允许 ks5u精品课件 7. They (can not/may not) _ still be out, the light is on in the house. 8. You (couldnt/might not) _ smoke on the bus. 9. With luck, tomorrow (can/could) _be a cooler day. 10. You (can/might) _ be right,
9、 but Im going back to check it. May, might, can, could can not couldnt could might 表示猜测(不可能) 表示许可 表示猜测 表示猜测 ks5u精品课件 will和would： 1）表示意愿 表示愿意做或主动提出做，如意志,愿望或决心 That bag looks heavy, Ill help you with it.( offering to do sth) - You know that book I lent you. Can I have it back if youve finished with it
10、? - Of course. Ill give it to you this afternoon.(agreement) Thanks for lending me the money, Ill pay you back on Friday. (promise) ks5u精品课件 2）表示习惯(habit, custom) This old man is strange. He will sit for hours without saying anything. We would sit around Grandpa after supper, listening to his storie
11、s. 3）表示请求（request）, 用于第二人称, would 比will 更委婉。 例如： Will you come this way, please? Would you open the window? ks5u精品课件 shall和should： 1）shall 的用法 a. shall 在疑问句中用于第一，第三 人称，表示征求对方的意见。 Shall we put off the sports meeting until next month? Shall Tom go there with me tomorrow? ks5u精品课件 b. shall 用于第二，第三人称，表示
12、说话人给对方 的命令，警告，允诺或威胁。 You shall fail if you dont work harder. （警告） He shall have the book when I finish reading it.(允诺) He shall be punished.(威胁) ks5u精品课件 a. should 表示劝告、建议、命令。 You should go to class right away. b. should 表示期待，用于表达合理推断（ prediction，意为“应该” ），或明显的结果（ 意为“可能”）且所期待的事几乎是事实。 It is three oclo
13、ck, the football game should begin now. Mary took dancing lessons for years, she should be an excellent dancer. 2) should 的用法 ks5u精品课件 1. We _ smoke here, because the worker is carrying some petrol. 2. It is dangerous. You _ leave the room immediately. 3. He _ go hiking with friends at weekends when
14、 young. 4. Write to me when you get home. -I _. 5. -Need I hand in my exercise book at once? -Yes, you_. 6. You have been working all day. You _ be very tired. 7. It is a long time since we met last time. You _ come and see us more often. 8. Why dont you try on this dress? It _ look nice on you. wil
15、l, would, shall, should, must: mustnt should would will must must should will 表示禁止,不许可 表示建议,命令 表示过去重复 表示意愿 表示必须 表示肯定猜测 表示建议 表示将会,一定会 ks5u精品课件 must and cant ks5u精品课件 must和cant： must 用来表示“命令”、“推测”等含义。 1）表示规定、指令 表示规定、指令时主要指客观上的法律、 条文规定，常常翻译为“应该、必须”之类 意思。mustnt表示禁止 You must have a passport if you want t
16、o go abroad. ks5u精品课件 2) 表示主观的命令、禁止 表示主观的命令、禁止时，主要指说 话者主观的命令或强烈的劝告。 You can go out with your friend but you must come back before 11 at night. -Must I hand in the exercise today? -No, you neednt. 。 ks5u精品课件 3）表示猜测，语气非常肯定，近乎确定 的意味，一般用于肯定句，意为肯定 。其否定为cant，意为不可能. 。 You must be ill. I can see it from you
17、r face. He cant be at home. I saw him in the classroom just now. ks5u精品课件 must和 have to 1.must用于一般问句中,肯定回答用must 否定式用 neednt或dont have to，做 “ 不必”,mustnt表示“禁止，不允许” Must I finish all assignments at a time? Yes, you must. No, you neednt. ks5u精品课件 I dont like this TV set. We must buy a new one. There was
18、 no more bus. They had to walk home. 2.表示“必须”这个意思时，must 和 have to 稍有区别。must着重说明主观 看法，have to 强调客观需要。另外， have to 能用于更多时态。 ks5u精品课件 Not sure Very sure He might be in the classroom. He may be in the classroom. He could be in the classroom. He should be in the classroom. He must be in the classroom. ks5
19、u精品课件 1. Find sentences with models in the passage: 1. Other celebrations were held when hunters could catch animals. 2. They lit fires and made music because they thought these festivals would bring a year of plenty. 3. or satisfy and please the ancestors, who could return either to help or to do h
20、arm. 4. In Japan the festival is called Obon, when people should go to clean the graves and light incense in memory of their ancestors. 5. On this important feast day, people might eat food in the shape of skulls, and cakes with “bones” on them. 6. It is now a childrens festival, when they can go to
21、 their neighbours homes and ask for sweets. ability possibility possibility the past habit possibility possibility ks5u精品课件 7. If they are not given anything, the children might play a trick. 8. Some people might win awards for their animals, flowers, fruit and vegetables, 9. At the Spring Festival
22、in China, peopleand may give children lucky money in red paper. 10. They might include parades, dancing in the streets day and night. possibility possibility possibility possibility ks5u精品课件 2.Complete the following sentences with proper modal verbs. 1) Youve been working all day. You _ be very tire
23、d. 2) (The door bell rings)I wonder who that is, it_ be Lisa. Shes still in the library at this time. 3) It is a long time since we met last time. You _ come and see us more often. 4) I havent decided where Im going for my holidays. I _ go to Australia. 5) My fathers birthday is coming. What _ I get
24、 him? 6) Why dont you try on this dress? It_ look nice on you. 7) “Who was the man talking with your teacher?” “Im not sure. It _ be her brother. 8) I dont know when the guests _ be here. They _ arrive at any time. must cant should may shall will might will could ks5u精品课件 2. A: _ Xiao Feng find the
25、origin of Easter from that book? B: No, he _. 1. A: _ you like to go to a special event with us on Saturday? B: Yes, I _ _. Would d like to go with you on Saturday Could couldnt find it 3. Finish the dialogue with modal verbs ks5u精品课件 3. A: _ I go with my friend to the harvest festival? B: Yes, you
26、_ _. 4. A: If I want to be a doctor _ I study science? B: Yes, you _. should study science May may go ( with your should friends ) ks5u精品课件 5. A: He is very handsome. _ he play the role of the prince? B: No, he _ _. cant play the role of the Can prince ks5u精品课件 Make a dialogue using modal verbs acco
27、rding to the given situation. You have to go to buy food and gifts for Spring Festival. In pairs, one as the shop keeper and the other as the customer, offer and request the items you need. Use these expressions to help you. Would you like ? Could I have ? Might I suggest ? May I see ? You should tr
28、y ? Could we look at ? Can you see ? We might take ? ks5u精品课件 Sample dialogue: In the supermarket a customer is talking with the salesman. A: Hello, I need to buy some things for the Spring Festival. B: May I suggest these gifts for the children? They are very popular. A: They are pretty, but could
29、I have a look at the red paper envelopes on the shelf? B: Sure, would you like these ones? They are less expensive. A: Thats fine. Ill take twelve of them. May I see what your pork is like? I need to make dumplings. B: Of course, its over there. You should try some of the cabbage that just arrived.
30、Its very fresh. A: Ok, could I have three cabbages and a kilo of pork? I also need some flour. B: Can you see the flour down there? Please take what you need. Thanks for coming in, and have a good holiday. ks5u精品课件 practice . Choose one of the following situations to create a short dialogue using mo
31、dal verbs. Situation A: In a library. Ask the librarian if he can help to find a book relating to some specific topics, whether they can be renewed or not, and how to do if the books are lost. (“Could you please find?” “May I ?” “You mustnt”) Situation B: A doctor gives a patient some advice. (“You
32、should”) Situation C: In a park by a lake. Discuss that one should not destroy the environment. (“You should”, “You shouldnt ”, “You mustnt ”) Situation D: Requesting an appointment. (“Will you?” “Shall I ?”) ks5u精品课件 1.-There were already five people in the car but they managed to take me as well.
33、-It _a comfortable journey. ( ) A. cant be B. mustnt have been C. shouldnt be D. couldnt have been D 2.The fire spread through the hotel very quickly but everyone _ get out. ( ) A. had to B. would C. could D. was able to D ks5u精品课件 3. Peter _ come with us tonight, but he isnt very sure. A.must B. ca
34、n C. may D. will C 4. - Could I call you by your first name? - Yes, you_. A. will B. could C. may D. might C 5. Sorry, I m late. I _ have turned off the alarm clock and gone back to sleep again. A.might B. should C. can D. will A ks5u精品课件 6.-Excuse me, but I want to use your computer to type a repor
35、t. -You _ have my computer if you dont take care of it. A. shant B. might not C. neednt D. shouldnt A 7. -When can I come for the photos ? I need them tomorrow afternoon. -They _be ready by 12 : 00 . A. can B. should C. might D. need B 8. With so much work on hand, you _to see the game last night. A
36、. mustnt go B. could have gone C. shouldnt go D. shouldnt have gone D ks5u精品课件 9.Johnny, you _play with the knife, you _hurt yourself. ( ) A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; wouldnt B 10. I missed the bus, so I _ go home on foot. A. must B. may C. can D. had to D ks5u精品课件 表示“能力 ” 表示“推测测 ” 表示“许许可；要求”表示“建议议 ”和“义务义务 ” canmustcanmust couldshouldcouldhave to couldmayneed maymightShall I ? mightmust cantshouldnt mayntmustnt mightntWould you like? Can ?Will you please ? ks5u精品课件