情态动词的句子

1、情态动词情态动词Note 2Note 1 Modal verbsabilitycertaintypermissionobligation make requests make suggestions make offers give advice 能力能力义务义务,责任责任肯定性肯定性允许允许 提出提出请求请求 提出提出建议建议提供帮忙提供帮忙提出提出意见意见1 情态动词表示推测的用法情态动词表示推测的用法情态动词情态动词must，can，could，may，might都可都可用来表示推测用来表示推测 1. must所表示的可能性最大，最有把握，意所表示的可能性最大，最有把握，意为为“一定一定

2、”。2. can和和could主要用于否定句和疑问句中主要用于否定句和疑问句中 ，cant或或couldnt 表示表示“不可能不可能”3. may 和和 might表示现在或将来可能发生的动作表示现在或将来可能发生的动作或情况，主要用于肯定句中，或情况，主要用于肯定句中，might相对于相对于may 来说，表示的可能性更小一些。来说，表示的可能性更小一些。注意：注意：1). 表示猜测，表示猜测，can/could一般不用于肯定一般不用于肯定句中，除非是句中，除非是“经验之谈经验之谈”。 如：如：Anybody can make mistakes 如：如：(正正) Can Could it be

3、 cloudy tomorrow ？(误误) May Might it be cloudy tomorrow ？1. Mary _ be in Paris， ，for I saw her in the town only a few minutes ago A mustnt B cant C shouldnt D may not2. Peter come with us tonight， ，but he isnt very sure yet A must B may C can D will 2)may和和might都不用于疑问句中。都不用于疑问句中。 3. Are you coming to

4、 Jeffs party Im not sure I go to the concert instead A must B would C should D might 4. It _ last night， ，for the ground was wet this morning A must have rained B may have rained C must rain D might rain should也可以用来表示也可以用来表示“推测推测”，意为，意为“可能；该可能；该”, 相当于相当于be expected to。往往。往往指具有一定的客观根据或根据推理对现在指具有一定的客观

5、根据或根据推理对现在某事发生的某事发生的“可能性可能性”进行描述，语气上进行描述，语气上不如不如must强。强。1. Will Mr Wang offer us a hand? He _ be glad to He never refused our request A can B must C may D should 2. 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 need3. Its nearly s

6、even oclock Jack _ be here at any moment A must B need C should D can 解答情态动词表示猜测的试题时，一解答情态动词表示猜测的试题时，一要清楚被猜测的时间，二要清楚有无要清楚被猜测的时间，二要清楚有无客观事实根据。客观事实根据。若有客观事实根据，若有客观事实根据，则无论是肯定还是否定的猜测，猜测则无论是肯定还是否定的猜测，猜测语气最强且符合时间要求的为最佳答语气最强且符合时间要求的为最佳答案；案；若无客观事实根据，若无客观事实根据，纯凭主观臆纯凭主观臆断则猜测语气最弱且符合时间要求的断则猜测语气最弱且符合时间要求的为最佳答案。

7、为最佳答案。 情态动词表示猜测时语气从强到弱的情态动词表示猜测时语气从强到弱的顺序是：顺序是：must，should，can，may，could，might。2 情态动词表示能力的用法情态动词表示能力的用法情态动词表示能力时，一般用情态动词表示能力时，一般用cancould或或be able to3. can 客观上能够；客观上能够；be able to 更侧重于更侧重于“克服克服一定困难一定困难”“”“经过一定努力经过一定努力”“”“有能力有能力”干某干某事事1. be able to用于表示能力并且用于表示能力并且可用于各种时态可用于各种时态，而而can只有一般现在时和一般过去时两种时态。

8、只有一般现在时和一般过去时两种时态。2. can常指现在，较常用；如果常指现在，较常用；如果只表示能力时，只表示能力时，两者都可用。两者都可用。注意：注意：The fire spread through the hotel very quickly but everyone _ get outA. had to B. would C. could D. was able to I can/am able to swim.We shall be able to finish the work next week.3 情态动词表示情态动词表示“许可许可”、“允许允许”的的用法用法 can/coul

9、d/may/might过去式过去式could常用于疑问句中，比常用于疑问句中，比can更加委更加委婉，表示礼貌。回答时，常用原形婉，表示礼貌。回答时，常用原形can或者或者may，不可再用过去式不可再用过去式could/might。 Could I borrow your dictionary? Yes, of course you _A. might B. will C. can D. should Can/May/Could I use your pen?肯定简略回答：肯定简略回答： Yes, you can/may. Yes, please.否定简略回答：否定简略回答： No, you

10、mustnt. Please dont. No, you may not. 4 其它情态动词的用法其它情态动词的用法1). shall用于第一、三人称疑问句中，表示用于第一、三人称疑问句中，表示说话人征求对方的意见和向对方请示。说话人征求对方的意见和向对方请示。Shall we begin our class?（征求意见）（征求意见）2). shall用于第二、三人称陈述句中，表示说用于第二、三人称陈述句中，表示说话人给对方的命令，警告，允诺，决心或威话人给对方的命令，警告，允诺，决心或威胁。胁。You shall go with me. (命令命令)You shall have the bo

11、ok when I finish it. (允诺允诺)He shall be punished. (威胁威胁)When shall Mike be able to leave hospital?(请示请示)3). 用于用于条约，规定，规章条约，规定，规章等文件中，等文件中，表示一种义务，多用于第三人称中。表示一种义务，多用于第三人称中。“The interest _ be divided into five parts, according to the agreement made by both sides.” declared the judge.A. may B. should C.

12、must D. shall4). should= ought to 表示劝告，命令，建表示劝告，命令，建议，意为议，意为“应该应该”，而，而ought to 语气更强语气更强 A: Ill start the work tomorrow. B: I think you should start today. C: No, you ought to start at once. (语气更强）语气更强）must / have tomust 必须，必须，侧重说话人的侧重说话人的主观主观看法看法have to (有多种时态）侧重于有多种时态）侧重于客观客观上的需上的需要，含有要，含有“不得不不得不”的

13、意思的意思have got to Must I hand in my exercises now? Yes, you must. (No, you neednt. No, you dont have to.)注意：注意：mustnt 不应该，不许，禁止不应该，不许，禁止neednt不必不必dont have to1. will表示请求表示请求, 建议等建议等, 不如不如would委婉委婉Will /Would you pass me the book?Will he pay for me?2. will 表示意志表示意志, 愿望愿望, 决心决心 I will never do that aga

14、in.I will give up smoking.used to和和would的区别的区别1. 都可以表示过去重复的习惯，都可以表示过去重复的习惯，used to 含含有有“过去怎样而现在却不这样了过去怎样而现在却不这样了”的意思；的意思；而而would则单纯表示过去的习惯性动作，常则单纯表示过去的习惯性动作，常和和often, everyday等连用。等连用。He would take a walk near the forest in the evening. （现在可能散步也可能不散现在可能散步也可能不散步了）步了）He used to take a walk near the for

15、est in the evening. （而现在不散步了）而现在不散步了）1. She isnt what she used to be. 她跟过去她跟过去不一样了。不一样了。（表示对比，不可用（表示对比，不可用would）2. There used to be a park. 以前这里有一以前这里有一个公园。个公园。表示过去的状态，只能用表示过去的状态，只能用used to，不可用，不可用would。used to和和would的区别的区别可兼做行为动词的情态动词：可兼做行为动词的情态动词：need 、 dare 情态动词情态动词 (+动词原形动词原形)行为动词行为动词 .needdare

16、1.1.无人称和数的变化无人称和数的变化; 2.2.尤其用于：尤其用于：* *否定句及疑问句中否定句及疑问句中; ;*在在if/whether之后之后;* *或与或与hardly, never, no one, nobody连用连用; 3.常以常以neednt和和darent 的形式出现的形式出现;4.dare有其过去时有其过去时dared. 多用于肯定句多用于肯定句; need to do dare to doneed to be done need doing Need I help you? Yes, please.You neednt telephone him now.How dar

17、e you talk to the teacher like that?The girl dare not go out alone at night. We need to tell him the news. You dont need to tell him the news. Do the flowers need watering? I didnt dare to tell you the truth. Would you dare to catch the snake with your hand? The boy dares to do anything he likes. Ho

18、w 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?Nobody need to be afraid of catching the disease.Nobody need be afraid of catching the disease.These dishes needed be cleaned care

19、fully.These dishes need to be cleaned carefully.These dishes need cleaning carefully.convenient transport: recommended(被推荐的被推荐的)English-speaking citizens: recommendedinternational airport: necessarytourist attractions: recommendedparks: optional 随意的随意的 cleanliness: recommendedsports stadium: necessa

20、rytraining grounds: necessaryhotels: necessaryrestaurants: recommendedoptional recommended necessary(1) must (2) has to (3) must (4) must (5) should (6) ought to(7) could (8) may (9) could(1) can (2) dare (3) can/could (4) may/might/could(5) mustnt/shouldnt/cant (6) mustnt/shouldnt/cant (7) can (8)

21、neednt(1) Shall (2) shall (3) Will (4) will/shall (5) will (6) will/shall (7) shall/will1. 表示对表示对现在现在或或将来将来情况的推测、判断情况的推测、判断用用“must + do ”2. 表示对表示对过去过去的情况或的情况或已经发生的已经发生的事情事情进行推测、判断用进行推测、判断用“must + have +done”3. 表示对表示对现在或过去正在进行现在或过去正在进行情况进行情况进行推测、判断用推测、判断用“must + be +doing ”表示推测表示推测情态动词的重要用法情态动词的重要用法表

22、示推测表示推测情态动词的重要用法情态动词的重要用法肯定的推测肯定的推测可能的推测可能的推测否定的推测否定的推测疑问的推测疑问的推测must 对将来对将来 对现在对现在 对过去对过去情态动词情态动词may, mightcould, can cant, couldntcan, could + V. + V. + have done常见常见must be + be doing + V. + V. + have done + be doing +V. + V. + have done + be doing+ V. + V. + have done + be doing1. 那小女孩没有出门。她现在一定

23、在做那小女孩没有出门。她现在一定在做家庭作业。家庭作业。2. 路上是湿的。昨晚一定下雨了。路上是湿的。昨晚一定下雨了。3. 我刚刚拜访过他。他现在一定呆在家我刚刚拜访过他。他现在一定呆在家里。里。4. 你为什么没有接电话？你为什么没有接电话？ 我当时一定是在睡觉所以没听见。我当时一定是在睡觉所以没听见。5. 那男孩想必已经完成了他的家庭作业那男孩想必已经完成了他的家庭作业了。了。 1. The girl is not out. She must be doing her homework now.2. The road is wet. It must have rained last nigh

24、t.3. I have just dropped in on him. He must stay at home.4. Why didnt you answer my phone call? Well, I must be sleeping, so I didnt hear it.5. The boy must have finished his homework.1. Jenny must have won the match, _? A. hasnt she B. doesnt she C. mustnt she D. cant she 2. The river is rising. It

25、 _last night.A.must be raining B. must rain C. might have rained D. must have rained3. Why! I couldnt get you on the phone this morning.We _tennis in the yard when you phoned.A.must be playing B. could be playing C. must have played D. must have been playing4. You must have seen the film last night,

26、 _ you?A. havent B. mustnt C. didnt D. hadnt5. Mr. Zhou must be working in the office, _ he?A. mustnt B. cant C. doesnt D. isnt6. 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 b

27、een1. “should ought to 完成式完成式” 表示表示 “本应当做某事，而实际上并没有做本应当做某事，而实际上并没有做”；“shouldnt oughtnt to完成式完成式”表表示示 “本来不应当做，而实际上却做了本来不应当做，而实际上却做了”。2. “maymight 完成式完成式” 表示表示 “本来本来可以干某事却没有干可以干某事却没有干”，突出其可能性；，突出其可能性；而而“could 完成式完成式” 表示表示“本来能够做某本来能够做某事，但实际上却没有做事，但实际上却没有做”。3. “neednt 完成式完成式” 表示表示 “本来没必本来没必要做某事，实际上却做了要做

28、某事，实际上却做了 情态动词在情态动词在虚拟语气虚拟语气中的用法中的用法 1) It around nine oclock when I drove back home because it was already dark. A. must beB. must have been C. cant be D. should have been 2) Johns score on the test is the highest in the class; _A. he should study last night B. he should have studied last nightC. h

29、e must have studied last night D. he must had to study last night 3) You yesterday if you were really serious about your work.A. ought to come B. ought to be comingC. ought to have come D. ought have come 4) “We didnt see him at the lecture yesterday.” “He it.” A.mustnt attendedB. couldnt have atten

30、dedC. would have not attendedD. neednt have attended 5) You _ all these parcels yourself. The shop would have delivered them if you had asked a shop assistant. A. didnt need to carry B. neednt have carried C. neednt carry D. didnt need carry 6) Mr. White _ at 8:30 for the meeting, but he didnt show

31、up. A. should have arrived B. should arrive C. should have had arrived D. should be arriving7) Ill tell Mary about her new job tomorrow. You _ her last week. A. ought to tell B. would have told C. must tell D. should have told1. Hows your tour around the North Lake? Is it beautiful? It _ be, but it

32、is now heavily polluted. （2007 全国卷全国卷I）A. will B. would C. should D. must 2. Guess what! I have got A for my term paper. Great! You _ read widely and put a lot of work into it. （2007 上海卷）上海卷）A.must B. shouldC. must have D. should have3. The teacher _ have thought Johnson was worth it or she wouldnt

33、have wasted time on him, I suppose. （2007 安徽卷）安徽卷） A. should B. can C. would D. must4. In crowded places like airports and railway stations, you_ take care of your luggage. （2007 北京卷）北京卷） A. can B. may C. must D. will5. My MP4 player isnt in my bag. Where _ I have put it? （2007 福建卷）福建卷） A. can B. mu

34、st C. should D. would6. The biggest problem for most plants, which _ just get up and run away when threatened, is that animals like to eat them. （2007 湖南卷）湖南卷）A. shant B. cant C. neednt D. mustnt 7. She looks very happy. She _ have passed the exam. （2007 江苏卷）江苏卷） I guess so. Its not difficult after

35、all.A. should B. could C. must D. might8. Where is my dictionary? I remember I put it here yesterday. You _ it in the wrong place. （2007 江西卷）江西卷） A. must put B. should have put C. might put D. might have put9. As a result of the serious flood, two-thirds of the buildings in the area . （2007 陕西卷）陕西卷）

36、A. need repairing B. needs to repair C. needs repairing D. need to repair10. I told your friend how to get to the hotel, but perhaps I have driven her there. （2007 陕西卷）陕西卷）A. could B. must C. night D. should11. I think Ill give Bob a ring. You _. You havent been in touch with him for ages.（2006江苏）江苏

37、）A. will B. may C. have to D. should12. Some aspects of a pilots job _ be boring, and pilots often _work at inconvenient hours.（2006湖南）湖南）A. can; have to B. may; can C. have to; may D. ought to; must13. We _ have proved great adventurers, but we have done the greatest march ever made in the past ten

38、 years.（2006天津）天津）A. neednt B. may not C. shouldnt D. mustnt14. Is Jack on duty today? It _ be him. Its his turn tomorrow.（2006四川）四川） A. mustnt B. wont C. cant D. neednt15. If it were not for the fact that she _ sing, I would invite her to the party.（2006福建）福建）A. couldnt B. shouldnt C. cant D. might

39、 not 16. As you worked late yesterday, you _ have come this morning.（2006陕西）陕西）A. neednt B. maynt C. cant D. mustnt17. Theres no light on they_ be at home.（2006全国全国I）A. cant B. mustnt C. neednt D. shouldnt18. May I smoke here ? If you _, choose a seat in the smoking section.（2006山东）山东）A. should B. c

40、ould C. may D. must19. Must he come to sign this paper himself? Yes, he _. (2006 广东广东 )A. need B. must C. may D. will Have a try!1. Is John coming by train? He should, but he _ not. He likes driving his car. (2002全国）全国） A. must B. can C. need D. may2. It has been announced that candidates (候选人候选人) _

41、 remain in their seats until all the papers have been collected. (2002上海上海） A. can B. will C. may D. shall3. I heard they went skiing in the mountains last winter. (2002北京北京） It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt be4. I thought you _ like som

42、ething to read, so I have brought you some books. A. may B. might C. would D. must 5. A computer _ think for itself; it must be told what to do.A. cant B. couldnt C. may not D. might not6. They will _ run this machine on their own in three months.A. can B. could C. may D. be able to7. That big cinem

43、a _ seat 2,000 people.A. can B. should C. ought to D. is able to8. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should9. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. can10. You _ return the book now. You can keep it till next week if you l

44、ike. A. cant B. mustnt C. neednt D. may not11. Johnny, you _ play with the knife, you _ hurt yourself. A. wont; cant B. mustnt; may C. shouldnt; must D. cant; shouldnt12. Will you stay for lunch? Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont13. May I pick a flower in the garden? _. A. No, you neednt B. Not, pl