情态动词用法课件

1、情态动词 语法特征 情态动词，在英文中主要用来表示说话人的看法、态度等。从用法上来说，它有这样几个特点：1）各个情态动词自身都有一定的词义。2）不能在句中独立担当谓语，也没有非谓语形式。3）情态动词在句中不受任何人称,数变化的影响。4) 情态动词后接的不定式（除ought外）都不带to ，即接动词原形。英文中的情态动词主要有：can , could ; may , might ; must ; ought ; need ; dare , dared ，另外，shall , will , should , would在一定的场合也可用作情态动词。桂长元教学课件2情态动词用法课件14 区别微妙的情

2、态动词练习 情态动词在近年来的高考试题中的难度日渐增大，不但是因为情态动词表示说话人的语气和心态等，而且这些往往是需用心体会而得的。因为语气的暗示在题目中变得更隐蔽，语气的变化更微妙，因而更综合化了。难点磁场1.()I didnt hear the phone I_ asleep.A.must be B.must have beenC.should be D.should have been2.()We _ last night,but we went to the concert instead.A.must have studied B.might studyC.should have s

3、tudied D.would study3.()John,you_ play with the knife,you_hurt yourself.A.wont;cant B.mustnt;mayC.shouldnt;must D.cant;shouldnt桂长元教学课件43 三、常见的情态动词 1. shall用于一、二、三人称疑问句表示征求对方意见；用于二、三人称陈述句表示说话人给对方的命令、警告、允诺或威胁等。 “The interest be divided into five parts, according to the agreement made by both sides，” d

4、eclared the judge. （2004年重庆卷） A. may B. should C. must D. shall Excuse me, but I want to use your computer to type a report. You _ have my computer if you dont take care of it. （2004年湖南卷） A. shant B. might not C. neednt D. shouldnt The room is so dirty. _ we clean it? Of course. （2003年北京春季卷） A. Will

5、 B. Shall C. Would D. Do 桂长元教学课件6346.When a pencil is partly in a glass of water, it looks as if it _.breaks B. has broken C. were broken D. had been broken47.Without electricity human life _ quite difficult today.A. is B. will be C. would have been D. would be桂长元教学课件8021.The boss say to the secreta

6、ry, “ If you work well, you _ have a rise.”A. shall B. would C. must D. ought22.Lets sing a song, _ we?A. will B. cant C. shall D. do23.“_ you go so soon?” “ No, I _ go yet.”A Must; mustnt B. Shall; wontC. Can; may not D. Must; needntThe book I borrowed from the library isnt here. Who _?A. could hav

7、e taken it B. must have taken itC. might take it D. should take it.25.“ They went to the lecture, but it had been put off.” “ Oh, so they _.”A. neednt have gone B. should have goneC. mustnt have gone D. dont need to go桂长元教学课件7446.When a pencil is partly in a glass of water, it looks as if it _.break

8、s B. has broken C. were broken D. had been broken47.Without electricity human life _ quite difficult today.A. is B. will be C. would have been D. would be桂长元教学课件805.()I was really anxious about you_ home without a word.(2001年高考)A.musnt leave B.shouldnt have leftC.couldnt have left D.neednt leave6.()

9、Are you coming to Jeffs party?Im not sure.I _ go to the concert intead.(2000年高考)A.must , B.wouldC.should D.might7.()Do you think he will do me a favour?As far as I know,he is the last one to help others.He _be prepared to give you a hand,though.（南京二模）A. might B. mustC. can D. should桂长元教学课件50案例探究1.Wi

10、ll you stay for lunch?Sorry,_ my brother is coming to see me.A.I mustntB.I cantC.I needntD.I wont2.Sorry Im late.I_ have turned off the alarm clock and gone back to sleep again. (2000年春季高考北京)A.might B.should C.can D.will桂长元教学课件46命题意图：本题考查对过去猜测的用法。属五星级题。知识依托：may/might/must+have done表示对过去的肯定猜测。cant/co

11、uldnt+have done表示对过去的否定猜测。错解分析：本题易误选B，而should have done表示应该做而实际上没做，这和语意“我可能是把闹钟关掉后又睡了”是矛盾的，故应选A。 解题方法与技巧：在这道题目中反映出的情态动词+完成式表示对过去发生事情的推测属于高考的一个重点和热点，对于这种题目首先要弄清各种搭配的含义，然后再结合语境选出准确答案。答案：A桂长元教学课件48命题意图：考查情态动词在一般疑问句答语中的用法。本题属四星级题。知识依托：mustnt 不允许、禁止cant客观上不能办到neednt不需要wont不会，不愿意错解分析：本题易误选D，I wont，只考虑了将来时

12、，而实际上，吃饭这件事是办不到的。解题方法与技巧：情态动词在一般疑问句中的问和答的应用，一般只涉及到词的基本用法。can表示做某事的水平。意思是“能够”“能”。或表示许可，在疑问句中表示要求，否定句表示不许。答案：B桂长元教学课件478.()You must have seen the film last night,_you?A.mustnt B.isntC.didnt D.havent9.()Its dark now.We have to stay here for the night, _ ?A. dont we B.havent weC. mustnt we D.shouldnt we

13、10.()He _through the forest alone.A.dare walk B.dare to walkC.dares walking D.dares to walk桂长元教学课件51 5. 表示经过努力而成功的某一次动作，只能用was/were able to，而不能用could。 The fire spread through the hotel very quickly but everyone _ get out. （1997年全国卷） A. had to B. would C. was able to D. could 桂长元教学课件6726.“_ I have a

14、glass of beer?” “ No, Im afraid you _.” A Cant; cant B. Could; wont C. May; darent D. Shall; may27.“ Isnt that Tom playing basketball?” “ It _ be; he fell off the ladder yesterday and got badly hurt.”mustnt B. would rather not C. couldnt D. wouldnt28.“ Need he go?” “ Yes, he _.”A. need B. can C. may

15、 D. must29.Tell me how you work out the answer, _ you?A. can B. will C. dont D. shant30.You promised your friend a letter; you ought to _ days ago.write B. be writing C. have written D. be written桂长元教学课件75二 情态动词的用法1 can 的用法1 表水平 (1）can could 表示水平；可能 (过去时用could), 只用于现在式和过去式(could)。be able to能够用于各种时态。

16、 如：They _tell you the news soon. A. will be able to B can C could The boy _ play the piano very well when he was seven . A. will be able to B can C could 桂长元教学课件3(2) was were able to 和could 在表示水平时能够替换；当表示成功地做了某事时，只能用was/were able to，相当于manage to 或succeeded in . 不能用could。 He was able to flee Europe b

17、efore the war broke out.= _=_注意：在否定句中，两者能够互换。如：-I wonder why she hasnt turned up yet .-Perhaps she_get away from her work .A wasnt able to B couldnt C cant D is able to He managed to flee Europe before the war broke out.He succeeded in fleeing Europe before the war broke out.桂长元教学课件4(3) 助动词后只用be abl

18、e toThey will _ tell you the news soon. 他很快就能告诉你消息了。(4) 情态动词后只用be able to 。They may _ do it .be able to be able to 桂长元教学课件5情态动词用法课件2 表示许可，允许，在疑问句中表示请求许可，在否定句中表示不许。此时代替更为正式的May .-_I come in ? A May B CanYou _smoke in non-smoking sections in public places , but you can in smoking-sections .The teacher

19、 said that we _ play foot ball on the playground .注意：could在表示提出请求时和推测时，不表示时态。 - Could I have the television on? - Yes, you _. -No, you _.（注意在回答中不可用could）cantcouldntcancant桂长元教学课件63表示推测或怀疑，强调客观可能性“可能，会”多用于疑问句和否定句中，表示推测时可用现在时，实行时，完成时。句子翻译：他会是谁呢？_他不可能正在等你。 _他不可能已独自去那里了。 _Who can he be ?He cant be waiti

20、ng for you . He cant have gone there along . 桂长元教学课件72 May 的用法 1） 表示允许或请求；口语中常可与can替换。 如：你现在能够走了。_表示没有把握的推测；”或许，可能”表示一件事情或许会发生，只用在陈述句中。 如：他可能来，但我认为他不会来。_注意： might 表示推测时，不表示时态。仅仅可能性比may 小。 He might be at home.You may go now .He may come, but I dont think he will .桂长元教学课件83) may 放在句首，表示祝愿。 愿上帝保佑你！_4）

21、成语： may/might as well，后面接不带to 的不定式，意为不妨。 如果那样的话，你不妨试一下。 If that is the case , _.典型例题 Peter _come with us tonight, but he isnt very sure yet. A. must B. may C. can D. willMay God bless you !You might as well try it !桂长元教学课件93 比较have to和must 1) 两词都是必须的意思，have to 表示客观的需要， must 表示说话人主观上的看法，既主观上的必要。如：我弟弟

22、病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)_他说他们必须努力工作。（主观上要做这件事） _比较：I must leave now .(主观) I m afraid youll have to leave now , its a rule of the hospital .（客观）My brother is badly ill now , so I have to send for a doctor at midnight . He said they must work hard . 桂长元教学课件102) have to有人称、数、时态的变化，而must只有一种形式。He h

23、ad to look after his sister yesterday.3） 在否定结构中： dont have to 表示不必 mustnt 表示“禁止”， 你不一定要把此事告诉他。_ 你一定不要把这件事告诉他。 _You dont have to tell him about it .You mustnt tell him about it .桂长元教学课件114在回答带有must 的问句时，否定结构不用mustnt 而用neednt dont have to .-Must I go home ? -Yes , _-No _5 表示偏偏，干嘛，（指做令人不愉快的事情） The car

24、must break down just when we were about to start off . Must you shout so loudly ?mustneednt / dont have to . ( 干嘛 ) ( 偏偏 )桂长元教学课件126 must表示推测 1) must用在肯定句中表示较有把握的推测，意为一定。 2) must表对现在的状态或现在正发生的事情的推测时， must 后面通常接系动词be 的原形或行为动词的实行式。 你辛苦干一整天，一定累了。（对现在情况的推测判断）_他一定在办公室工作呢。_ 比较： He must be staying there. H

25、e must stay there. Youve worked all day long so you must be tired . He must be working in his office .他现在肯定呆在那里他必须呆在那。桂长元教学课件133) must 表示对已发生的事情的推测时，must 要接完成式。我刚才没有听到电话，我想必是睡着了。_ 4) must表示对过去某时正发生的事情的推测，must 后面要接动词的完成实行式。 -Why didnt you answer my phone call? -Well, I _,(sleep) so I didnt hear it.I

26、did hear the phone . I must have slept .must have been sleeping .桂长元教学课件145) 否定推测用cant。If Tom didnt leave here until five oclock, he cant be home yet. 如果汤姆五点才离开这儿，他此时一定还未到家。 桂长元教学课件154. shall 用法1）用于第一人称的构成一般将来时。2)一般用于二、三人称陈述句中，表示命令、许诺、警告、威胁，决心、义务、规定等。You shall have my answer tomorrow He shall be sor

27、ry for it one day , I tell you .You shall do as I tell you .Nothing shall stop us from fighting against pollutionEach citizen shall carry ID card when travelling.(允诺)（警告）（命令）(决心)义务、规定桂长元教学课件163)用于征求对方的意见和指示，用在一，三人称的疑问句中。Shall I turn on the light ? Shall he come to see you ?_注： Shall +第三人称主格+do sth =

28、Do you want +第三人称宾格+to do sth .=Do you want him to see you ?桂长元教学课件175 should 用法Should不是一个单独意义的情态动词，它仅仅shall 的过去式。1） 表示劝告，建议常作应该，理应之义，与ought to 有时能够互换，ought to更注意一些责任义务。 You should do it by yourself .2） 表示按常理实行推测，预测其可能性，译为“应该，可能” He should be in his office now .桂长元教学课件183） should用于某些从句中表虚拟语气。用于表示建议，

29、命令的从句中，表示建议，命令的动词有suggest 、advice、 demand、 require 、request、desire 、ask 、insist 等词的宾语从句的谓语动词用should+动词原形。并能够省略。He suggested that I (should) do so.（2）用在suggestion 、wish 、requirement、 instruction 、order、 等词后的表语从句或同位语从句中。 It is my wish that you should do so . 桂长元教学课件19（3）用于一些如it is demand /desired /ins

30、isted /ordered /suggested /necessary /important/that .等结构的主语从句中。如It is demanded that we get everything ready by the end of the week . 4）表示惊奇，怀疑，不满等情绪，译为“竟然”。常用在why , how 开头的疑问句，以及I am surprised, It worried me, Its a pity 等结构后的句子中。 Its a pity that he should be so careless . Why should I invite him ?

31、How should I know ？桂长元教学课件20 6 will 1)表示意志和决心，用于各种人称。主语为物时表示固有的性质和倾向Ill do my best . The door wont shut.2)表客观事实或习惯动作。Fish will die out of water .Oil will float on water.3）表示意愿倾向-Who can close the door ?-I will (Ill do it )注本句不能用be going to /be to do 结构，因为本句不表计划打算，仅仅一个反射性动作。桂长元教学课件213）也表示一种揣想推测，用于二三人

32、称。They will have arrived by now .他们大概已经到了。5)有时表示，难免 、毕竟。Boys will be boys . 男孩毕竟是男孩。Accident will happen . 事故难免会发生。桂长元教学课件227 would would 是will的过去式，would +v 构成过去将来时，除此之外，是单独的情态动词。1 表示过去时间的“意志，愿望和决心”I told him that I would go along with him .2 委婉提出请求，建议或看法，语气比will委婉，肯定答语用will .Would you help him ? Ye

33、s , I will .3 表示过去的习惯动作和过去的某种倾向。When he was a child he would (used to )play football .桂长元教学课件23Would 和 used to 的区别。1 used to 主要用于今昔习惯的对比，表明过去如何，现在已不再如此了。而would 不能用于今昔习惯的对比。2 used to 用于表示过去的习惯或过去一贯存有的情况状态，而would只能表示过去重复的动作，不能表示情况或状态。如There used to be a house here . 不能用would 这里是表状态。3 used to 不可接时间状语，而

34、would只谈过去，与现在无关，所以句中常有时间状语。（always every day 或表示时间的上下文。）桂长元教学课件248 Need 的用法1） need 的意思是“”需要，既是行为动词，又是情态动词。 作形为动词时，他具有一般动词的各种形式，（need、 needs、 needed 、needing）,与助动词（do、 does 、did ）连用构成疑问句和否定句，后面接名词或动词不定式作宾语。 作为情态动词，只有一种形式，没有人称和数的变化，后接动词原形，与not 连用时构need not的否定式，疑问句把need提前。 桂长元教学课件251)I need a new compu

35、ter . 2)Your room need painting 3)He doesnt need to work late into the night .4)I need to get a new car .5)Need he work so late ? yes, he must no , he neednt .6)you neednt walk that fast , need you?你不必走那么快，是吗？实义动词情态动词实义动词实义动词实义动词情态动词桂长元教学课件26注意1： need 的被动含义：need, want, require, worth（形容词）后面接doing也能够

36、表示被动： need doing = need to be done注意2：need 作情态动词不用在肯定句中，只用于疑问句和否定句中， 桂长元教学课件279 dare的用法1 它既能够作行为动词又能够作情态动词，作情态动词时，主要用于疑问句，否定句及条件句中，陈述句中很少使用但（I dare say ）除外。没人称和数的变化，但有时态变化，过去时为dared. 否定式为darent .How dare you say Im unfair ?He dare not speak English before such a crowd , dare he ?情态动词情态动词桂长元教学课件28作行为

37、动词时，有时态，人称和数的变化，所不同的是，作行为动词时，在肯定句中，其后常接带to的动词不定式，但在否定句和疑问句中，其后的to 可省可不省。如：I dare to swim across this river .He does not dare (to) answer Dont you dare (to )touch it ?桂长元教学课件2910 含有情态动词的反意疑问句构成反意问句时，常用情态动词。 She will come , wont she?1）谓语动词是“ought to +动词原形”疑问部分用ought , ought not , shouldnt +主语代词。He oug

38、ht to be punished ,_2) 当陈述部分是dare need 时，分情况而定。如：They need to do it , You darent come , oughtnt he ?dont they ?dare you ?桂长元教学课件303) must 表推测时， 疑问部分应该根据其后的谓语动词来确定。(注意：当must have done结构中有表示过去的时间状语时，不用havent 而用didnt)如：you must be Mr Li , _you must have finished it , _She must have read the book yester

39、day ,_ 注：must 表示禁止时，附加部分最好不重复使用must 而用mayYou mustnt walk on grass , _注：could表示推测时，反意疑问句附加部分构成与must一致。She couldnt have finished it yesterday, _arent you ?havent you ?didnt she ?did she ?maymust you ?桂长元教学课件3111 表示推测的用法 can, could, may, might, must 皆可表示推测，其用法如下：1）情态动词+动词原形。 表示对现在或将来的情况的推测，此时动词通常为系动词。

40、I dont know where she is, she may be in Wuhan.2）情态动词+动词现在实行时。 表示对现在或将来正在实行的情况实行推测。 At this moment, our teacher must be correcting our exam papers. 桂长元教学课件323）情态动词+动词完成时。 表示对过去情况的推测。 The road is wet. It must have rained last night. 地是湿的，昨天晚上一定下雨了。桂长元教学课件334）情态动词+动词的现在完成实行时。 表示对过去正在发生事情的推测。 Your mothe

41、r must have been looking for you. 你妈妈一定一直在找你。5）推测的否定形式，疑问形式用cant, couldnt表示。 Mike cant have found 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。 注意：could, might表示推测时不表示时态，其推测的水准不如can, may。 桂长元教学课件3412 情态动词+ have +过去分词 may(might) have + done sth, can (could) have + do

42、ne sth 表示过去，推测过去时间里可能发生的事情。 Philip may (might) have been hurt seriously in the car accident. Philip can (could) have been hurt seriously in the car accident.桂长元教学课件352) must have +done sth，对过去时间里可能发生的事情的推测，语气较强，具有“肯定”，“谅必”的意思。 -Linda has gone to work, but her bicycle is still here. -She must have go

43、ne by bus.桂长元教学课件363) ought to have done sth, should have done sth 本应该做某事，而事实上并没有做。否定句表示“不该做某事而做了”。 You ought to (should) have been more careful in this experiment. He ought not to have thrown the old clothes away.（事实上已扔了。） ought to 在语气上比should 要强。桂长元教学课件374) neednt have done sth 本没必要做某事 I dressed v

44、ery warmly for the trip, but I neednt have done so. The weather was hot.5) would like to have done sth 本打算做某事 I would like to have read the article, but I was very busy then. 桂长元教学课件388 should 和ought to should 和ought to 都为应该的意思，可用于各种人称。 -Ought he to go? -Yes. I think he ought to. 表示要求，命令时，语气由 should

45、（应该）、had better最好）、must（必须）渐强。 桂长元教学课件3913 情态动词的回答方式 问句 肯定回答 否定回答Need you? Yes, I must. No,I needntMust you? Yes,you must. Neednt/dont have to. 桂长元教学课件40典型例题1）-Could I borrow your dictionary? -Yes, of course, you_. A. might B. will C. can D. should 答案C. could表示委婉的语气，并不为时态。答语中of course，表示肯定的语气，允许某人做某

46、事时，用can和 may来表达，不能用could或might。复习： will 与you连用，用来提出要求或下命令。should与you 连用，用来提出劝告。桂长元教学课件412）-Shall I tell John about it? -No, you _. Ive told him already. A. neednt B. wouldntC. mustnt D. shouldnt 答案A。neednt 不必，不用。 wouldnt 将不, 不会的。 mustnt 禁止、不能。 shouldnt 不应该。本题为不需要，不必的意思，应用neednt。3）-Dont forget to com

47、e to my birthday party tomorrow. -_.A. I dont B. I wont C. I cant D. I havent 答案B. will既可当作情态动词，表请求、建议、也可作为实义动词表“意愿、意志、决心”，本题表示决心，选B。 桂长元教学课件4214 区别微妙的情态动词练习 情态动词在近年来的高考试题中的难度日渐增大，不但是因为情态动词表示说话人的语气和心态等，而且这些往往是需用心体会而得的。因为语气的暗示在题目中变得更隐蔽，语气的变化更微妙，因而更综合化了。难点磁场1.()I didnt hear the phone I_ asleep.A.must

48、be B.must have beenC.should be D.should have been2.()We _ last night,but we went to the concert instead.A.must have studied B.might studyC.should have studied D.would study3.()John,you_ play with the knife,you_hurt yourself.A.wont;cant B.mustnt;mayC.shouldnt;must D.cant;shouldnt桂长元教学课件434.()Its near

49、ly seven oclock.Jack_ be here at any moment.A.mustB.needC.shouldD.can5.()She_for what she has done,but why do you keep silent on it?A.ought to praise B.ought to have praisedC.ought to be praised D.ought to have been praised6.()If your boss is not right,you_him.A.mustnt obey B.dont have to obeyC.woul

50、dnt have obey D.cant have obey桂长元教学课件447.()Shall I call a doctor for you? _.I will be better soon.A.Yes,you may B.No,you mustntC.No,you neednt D.Id rather not8.()Would you like to go shopping with me tonight?_.A.Id love so B.Ill like toC.I would like thatD.Id love to9.()He_ you more help,even though

51、 he was very busy.A.might have given B.mightC.may have given D.may give10.()Noise_ harmful in China.A.didnt use to be consideredB.usednt to considerC.didnt use to considerD.isnt used to be considered桂长元教学课件45案例探究1.Will you stay for lunch?Sorry,_ my brother is coming to see me.A.I mustntB.I cantC.I n

52、eedntD.I wont2.Sorry Im late.I_ have turned off the alarm clock and gone back to sleep again. (2000年春季高考北京)A.might B.should C.can D.will桂长元教学课件46命题意图：考查情态动词在一般疑问句答语中的用法。本题属四星级题。知识依托：mustnt 不允许、禁止cant客观上不能办到neednt不需要wont不会，不愿意错解分析：本题易误选D，I wont，只考虑了将来时，而实际上，吃饭这件事是办不到的。解题方法与技巧：情态动词在一般疑问句中的问和答的应用，一般只涉及

53、到词的基本用法。can表示做某事的水平。意思是“能够”“能”。或表示许可，在疑问句中表示要求，否定句表示不许。答案：B桂长元教学课件47命题意图：本题考查对过去猜测的用法。属五星级题。知识依托：may/might/must+have done表示对过去的肯定猜测。cant/couldnt+have done表示对过去的否定猜测。错解分析：本题易误选B，而should have done表示应该做而实际上没做，这和语意“我可能是把闹钟关掉后又睡了”是矛盾的，故应选A。 解题方法与技巧：在这道题目中反映出的情态动词+完成式表示对过去发生事情的推测属于高考的一个重点和热点，对于这种题目首先要弄清各种

54、搭配的含义，然后再结合语境选出准确答案。答案：A桂长元教学课件48歼灭难点训练1.()Dont lock the door in case he_ back late at night.A.should comeB.might comeC.will come D.would come2.()You_worry about the old man.He_ well already.A.dont need;gets B.neednt;may have gotC.mustnt;got D.dont need to;may get3.()Ive tried many times,but the car

55、 just_.A.wont start B.wouldnt startC.doesnt start D.didnt start4.()Better set off at once,_?A.wont you B.shall weC.hadnt youD.wouldnt you桂长元教学课件495.()I was really anxious about you_ home without a word.(2001年高考)A.musnt leave B.shouldnt have leftC.couldnt have left D.neednt leave6.()Are you coming to

56、 Jeffs party?Im not sure.I _ go to the concert intead.(2000年高考)A.must , B.wouldC.should D.might7.()Do you think he will do me a favour?As far as I know,he is the last one to help others.He _be prepared to give you a hand,though.（南京二模）A. might B. mustC. can D. should桂长元教学课件508.()You must have seen th

57、e film last night,_you?A.mustnt B.isntC.didnt D.havent9.()Its dark now.We have to stay here for the night, _ ?A. dont we B.havent weC. mustnt we D.shouldnt we10.()He _through the forest alone.A.dare walk B.dare to walkC.dares walking D.dares to walk桂长元教学课件51 情态动词考查热点透视 情态动词是高考考查的重点语法项目之一，2008年对口升学英语

58、第25、31题考查了情态动词，全国普通高考各地试题对此都有考查。下面就近几年来高考试题中出现的情态动词的考点实行归纳分析，以便同学们复习掌握。桂长元教学课件5225 Lucy , be careful next time . You _such a mistake .A dont make B have not made C cant have made D shouldnt have made 31 My teacher promised that he _his camera to me .A would lend B lent C lends D will lend 桂长元教学课件53

59、一、情态动词表推测 1. 肯定的推测一般用must, should, may（might）或could（不用can），其中，must的语气最强，译为“肯定”、“准是”、“想必是”；should的语气次之，译为“很可能”、“应该”，指按常理推测；may（might），could的语气最弱，译为“也许”、“可能”。桂长元教学课件54Helen _ go on the trip with us but she isnt quite sure yet. （2005年安徽卷） A. shall B. must C. may D. can Ive taken someone elses green swe

60、ater by mistake. It _ Harrys. He always wears green. （2005年广东卷） A. has to be B. will be C. mustnt be D. could be I have lost one of my gloves. I _ it somewhere.（2005年北京春季卷） A. must drop B. must have dropped C. must be dropping D. must have been dropped If I _ plan to do anything I wanted to ,Id like