大数据考场丢分语法考点集锦 高中英语语法易错题：情态动词 附答案与超详解析
高考英语易错题专题三情态动词(含解析)及解析
高考英语易错题专题三情态动词(含解析)及解析一、单项选择情态动词1．Mr. Smith is almost on time for everything. How ________ it be that he was late for the meeting?A．can B．should C．may D．must【答案】A【解析】【详解】考查情态动词辨析。
句意：史密斯先生几乎任何事情都是准时的。
他怎么可能开会迟到了？ A. can可能，可能性，表示可能性时，常用于否定句和疑问句中，且有时还带有“惊奇、不相信” 等感情色彩。
B. should 应该； C. may也许，表示可能性时常用于肯定句中，不用于疑问句中。
D.must常用于肯定句中表推测，“一定……”的意思；本题是强调句型的一个变式：强调其特殊疑问句how的形式。
根据前句“斯密斯先生几乎是很准时”可推测出“怎么可能开会迟到呢？”。
根据句意可知，用于疑问句中的“可能性”且有不相信的色彩，四个选项只有“can”符合题意。
故选A【点睛】情态动词就是表示说话者对事情的一种看法，也就是一种语气。
情态动词的用法一直是命题者常设置的考点和重点，平时要加强记忆。
2．would可以表达过去常常做的事，过去习惯发生的动作：Pirates would bury gold in a cave. 海盗们常常把黄金藏在山洞中。
We would take a walk along the river. 我们过去常常沿河散步。
3. would后接like、love、mind等动词，表示要求、邀请、希望或询问，此时不是说过去，而是对现在的询问：Would you like to come to my party? 你愿意来我的派对吗？Would you mind coming with us? 你介意和我们一起吗？比如本题，would 表示婉转的请求，征求对方的意见，故选A。
高考英语新情态动词知识点易错题汇编及答案解析(2)
高考英语新情态动词知识点易错题汇编及答案解析(2)一、选择题1．One of our rules is that every student _______ wear school uniform while at school. A．might B．couldC．shall D．will2．Tourists who enter the quiet area _____ obey the rule to reduce any potential effect on the environment.A．can B．may C．shall D．dare3．What a pity! Considering his ability and experience, he ___________ it better.A．need have done B．must have doneC．can have done D．might have done4．Home is not just the place where you grow up. It ________ be a warm smile, a sincere hug, and a shoulder for you to cry on.A．must B．can C．will D．should5．No student ______go out of school after eleven o’clock at night without the teacher’s permission.A．will B．must C．may D．shall6．My computer ________ start this morning. There must have been something wrong with it. A．wouldn’t B．shouldn’t C．couldn’t D．mustn’t7．–Will you read me a story, Mummy?--OK. You ______have one if you go to bed as soon as possible.A．might B．must C．could D．shall8．—I heard they went skiing in the mountains last winter.—It true because there was little snow there.A．may be not B．won’t be C．couldn’t be D．mustn’t be 9．According to the latest rule, people _______sort household garbage into four categories. A．can B．shall C．may D．need 10．—Isn’t that Ann’s h usband over there?— No, it ________ be him —I’m sure he doesn’t wear glasses.A．must not B．can’t C．won’t D．may not 11．—Is Robert coming by coach?—He should, but he ___________ not. He likes driving his car.A．may B．could C．need D．must12．—I can’t think why he________ so angry. I mean no harm.—It’s typical of him to be sensitive(敏感的).A．should have been B．must have beenC．might have been D．can have been13．–Do you know where David is? He is not in the office.–Well, he ______ have gone far—his coat is still here.A．shouldn’t B．mustn’t C．can’t D．wouldn’t 14．Mr. White _______ to hospital for an examination yesterday but he was too busy to come.A．should come B．should have come C．should be coming D．should had come 15．He ______ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.A．shouldn’t be B．can’t have finishedC．can’t be D．mustn’t have finished16．The lady ________ have done something wrong, because she is looking guilty. A．would B．should C．can D．must17．You _________ me about it earlier, but you didn't.A．should have told B．would have toldC．must have told D．should tell18．Tom told us that he ______ come to the party tonight, but he wasn’t sure about this. A．will B．would C．could D．might19．— Did Bob take the job in the supermarket? — No, but I think he _________.A．will have B．may have C．should have D．must have 20．We lost our way in that small village, otherwise we ________more places of interest yesterday.A．visited B．had visitedC．would visit D．would have visited21．—Peter, you delivered a wonderful speech today.—Thanks, but I think I ______ more attention to my stage manners during that time.A．must pay B．should payC．must have paid D．should have paid22．—Can I inform my best friends of the result?—No, I want to keep it a secret . You ____tell anyone.A．won't B．don't have to C．mustn't D．don't need to 23．He plays basketball very well. He_________ it a lot.A．may practise B．must practiseC．must have practised D．should have practiced24．It was so noisy that we hear ourselves speak.A．couldn’t B．shouldn’tC．mustn’t D．needn’t25．Mary is a bit shy and ____ a speech in public, which makes her lose the precious chance to do the voluntary job.A．dares not make B．doesn’t dare makeC．dare not to make D．dares not to make【参考答案】***试卷处理标记，请不要删除一、选择题解析：C【解析】【分析】【详解】考查情态动词辨析。
备战2024年高考英语考试易错点09 情态动词和虚拟语气(4大陷阱)(解析版)
易错点09情态动词和虚拟语气目录01易错陷阱（4大陷阱）02举一反三【易错点提醒一】情态动词基本用法易混易错点【易错点提醒二】情态动词表判断推测易混易错点【易错点提醒三】情态动词后+have done易混易错点【易错点提醒四】虚拟语气易混易错点03易错题通关易错陷阱1：情态动词基本用法易混易错点。
【分析】功能：情态动词不能单独作谓语，后跟动词原形共同构成谓语。
形式：情态动词没有人称和数的变化。
否定形式是多数情态动词的否定式是在情态动词的后面加not。
时态：个别情态动词有现在式和过去式两种形式，过去式用来表达更加客气、委婉的语气。
位置：情态动词在谓语之前；谓语动词前若有助动词，则在助动词之前。
疑问句中在主语之前。
【高频考点】1.can/could表能力、请求、可能性(表示可能性用于否定句及疑问句中)；特殊句型：can not...too.../enough(再怎么……也不过分)、can't help but do sth.(不得不做某事)、can't wait to do sth.(迫不及待地做某事)。
2.may/might表较小的可能性；表示请求许可以及祝愿。
句型和搭配：may/might as well do表示“还是……好；最好……”；may well do表示“很可能”；may可以用来表示祝愿，用“may＋主语＋动词原形”结构。
May you succeed.祝你成功。
3.must表示非常肯定的推测；表“偏要；非要……不可”；mustn't意为“禁止”，表示“不必”应用needn't。
4.shall的用法用于第二、三人称的陈述句中，表命令、警告、许诺或威胁等，语气强于should；用于第一、三人称的疑问句中，表示征询意见。
5.should/ought toshould表责任、义务、劝告、建议等，意为“应该”，还可表出乎意料的语气，意为“竟然”；ought to表义务或责任，意为“应该”。
高考英语最新情态动词知识点易错题汇编含解析
高考英语最新情态动词知识点易错题汇编含解析一、选择题1．Mary is a bit shy and ____ a speech in public, which makes her lose the precious chance to do the voluntary job.A．dares not make B．doesn’t dare makeC．dare not to make D．dares not to make2．Schools have been lengthening the school day to raise test marks, which ________ be costly if schools need air conditioning on hot days.A．might B．can C．dare D．need3．You ______ feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.A．may B．can C．should D．would4．She is shy and ________ the teacher’s question.A．dares not answer B．doesn’t dare to answerC．dare not to answer D．dares not to answer5．If you behave well from now on, you ___ have an Apple Watch for your 18th birthday. A．will B．shall C．can D．must6．You ________ give me a lift. I want to walk home for exercise.A．needn’t B．couldn’t C．can’t D．mustn’t7．—It’s so hot and uncomfortable here! Why are your windows still closed?—Oh, I’m not to blame. They ________ open.A．shan’t B．must n’t C．won’t D．wouldn’t8．You ______ have carried all these parcels yourself. The shop would have delivered them if you had asked them.A．may not B．needn't C．can't D．mustn't9．I ______my examination easily but I made too many stupid mistakes.A．should pass B．could have passedC．had passed D．must have passed10．—Isn’t that Ann’s husband over there?— No, it ________ be him —I’m sure he doesn’t wear glasses.A．must not B．can’t C．won’t D．may not 11．Skills like critical thinking and analysis ________ be found on the Internet, because they must be acquired in the context of facts.A．can’t B．needn’t C．mustn’t D．shouldn’t12．I can’t thank you more, Tony. But for your timely warning, I into great trouble yesterday. A．had got B．got C．would have got D．would get 13．Although you ______ find bargains in London, it’s not generally a cheap place to shop. A．should B．need C．must D．can 14．—Peter, you delivered a wonderful speech today.—Thanks, but I think I ______ more attention to my stage manners during that time.A．must pay B．should payC．must have paid D．should have paid15．—You look so tired. You________ late last night.—Yes. I had to to do an important report and stayed up till I completed it.A．should sleep B．must sleepC．should have slept D．must have slept16．You ______ have been out last night, for all the lights in your room were not on.A．need B．must C．may D．should 17．(2018·天津) I can't find my purse. I___________ it in the supermarket yesterday, but I'm not sure.A．should leave B．must have leftC．might leave D．could have left18．She looks very happy. She_________ the exam.A．can have passed B．should have passed C．must have passed D．could have passed 19．(2018·北京) In today’s information age, the loss of data _________ cause serious problems for a company.A．need B．shouldC．can D．must20．He ______ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.A．shouldn’t be B．can’t have finishedC．can’t be D．mustn’t have finished21．You _________ me about it earlier, but you didn't.A．should have told B．would have toldC．must have told D．should tell22．Tom told us that he ______ come to the party tonight, but he wasn’t sure about this.A．will B．would C．could D．might 23．Although passing the driving test ________ be difficult now, it’s worth th e efforts. A．need B．shallC．can D．should24．We lost our way in that small village, otherwise we ________more places of interest yesterday.A．visited B．had visitedC．would visit D．would have visited25．It ___________ last night, for the road was very muddy.A．would have rained B．must have rained C．should have rained D．must rain【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】【详解】考查动词。
(英语)高考英语易错题专题三情态动词(含解析).docx
（英语）高考英语易错题专题三情态动词(含解析 )一、单项选择情态动词1．I often felt troubled in my teens and my grandma ________ comfort me, saying“ Life is like that, dear”.A． would B． might C． should D． must【答案】A【解析】【解】考情。
句意：在我十几的候，我常感到，我的奶奶会安慰我，“生活就是，的”。
此是would+ 原形，表示“ 去是做某事”。
故A。
2．What a pity! Considering his ability and experience, he ___________ it better.A． need have done B．must have doneC． can have done D． might have done【答案】 D【解析】【解】考虚气中的情。
句意：真憾啊！考到他的能力和，他也可以做得更好。
can have done 少使用此构，表示去行的疑；用于疑句意“ 道真的做了”，表示疑； need have done 需要做某事，上却未做（表示虚气）；must have done 一定做了某事（表示去生的事情的肯定推）；might have done 表示生的事情的推，意思是“可能已”或“也已”，用于肯定句中。
故 D 正确。
【点睛】本是高考必考考点，一定要牢句型意思。
must have done 去肯定做了某事。
shouldhave done 本做而未做。
can ’ t have done去不可能做了某事； shouldn ’ t have done本不做而做了。
need have done 本有必要做某事而没做；needn’t have done本没有必要做某事；注意没有mustn’t have done的形式。
3．— It ’ s already 11 o’ clock , and he ______ have been here half an hour ago.—Maybe he got caught in the rain.A． must C． may B．ought to D． can【答案】B 【解析】【解】考情。
高考英语情态动词知识点易错题汇编含答案解析
高考英语情态动词知识点易错题汇编含答案解析一、选择题1．You ______ have been out last night, for all the lights in your room were not on.A．need B．must C．may D．should2．—I can’t think why he________ so angry. I mean no harm.—It’s typical of him to be sensitive(敏感的).A．should have been B．must have beenC．might have been D．can have been3．You ______ feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.A．may B．can C．should D．would4．For all of the diligent students here, I give you my promise: Work hard, and you ________ be rewarded!A．can B．need C．shall D．could5．She is shy and ________ the teacher’s question.A．dares not answer B．doesn’t dare to answerC．dare not to answer D．dares not to answer6．-Jenny took the 8：00 bus to Guangzhou this morning.-Really? He＿＿the 9:00 train. It's much more comfortable and safer to travel by train. A．could have taken B．should takeC．must have taken D．can take7．No student ______go out of school after eleven o’clock at night without the teacher’s permission.A．will B．must C．may D．shall8．I didn’t hear the phone. I ___ asleep.A．must be B．must have beenC．should be D．should have been9．According to the latest rule, people _______sort household garbage into four categories. A．can B．shall C．may D．need10．—Life ____ be very hard for people living in the north of Canada as it is very cold there in winter.—Yes, the weather there _____ be as low as 60℃ below zero.A．must; can B．shall; must C．will; should D．has to; can 11．There are still 30 minutes ____, so we ____ hurry with lunch.A．going…needn’t B．to leave…don’t need C．leaving…needn’t to D．to go…needn’t12．I can’t thank you more, Tony. But for your timely warning, I into great trouble yesterday. A．had got B．got C．would have got D．would get 13．—You look so tired. You________ late last night.—Yes. I had to to do an important report and stayed up till I completed it.A．should sleep B．must sleepC．should have slept D．must have slept14．—May I smoke here?—If you _______, choose a seat in the smoking section.A．must B．should C．may D．can 15．(2018·天津) I can't find my purse. I___________ it in the supermarket yesterday, but I'm not sure.A．should leave B．must have leftC．might leave D．could have left16．More and more countries have come to realize that the world____ do without Huawei and its "more advanced" technology.A．can’t B．needn’t C．mustn’t D．shouldn't 17．(2018·北京) In today’s information age, the loss of data _________ cause serious problems for a company.A．need B．shouldC．can D．must18．He ______ writi ng the paper now. He hadn’t written a single word when I left him ten minutes ago.A．shouldn’t be B．can’t have finishedC．can’t be D．mustn’t have finished19．The girl _________ out alone at night.A．dare not go B．dare not to go C．dares not go D．not dare go 20．You _________ me about it earlier, but you didn't.A．should have told B．would have toldC．must have told D．should tell21．It’s nearly 7 o’clock. Jack ____________ be here at any moment.A．shall B．had toC．ought to D．have to22．I____________ go to a summer camp during the summer vacation, but I am not sure. A．might B．can C．must D．need 23．—Sorry, Mum! I failed the job interview again.—Oh, it's too bad. You________ have made full preparations.A．must B．can C．would D．should24．You________have scolded him for his poor performance.After all,he had done his best. A．wouldn’t B．couldn’t C．mustn’t D．shouldn’t25．—I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.—Oh, it ________ my younger sister. She was in my room at that moment.A．must have been B．should have beenC．could have been D．may have been【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】【详解】考查情态动词的用法。
高考英语情态动词知识点易错题汇编及解析
高考英语情态动词知识点易错题汇编及解析一、选择题1．—I’m sorry, I ________ have been so rude to you that way.—Forget it, but I was a bit out of control yesterday.A．mustn’t B．shouldn’tC．couldn’t D．needn’t2．—Where is my dictionary?I remember I put it here yesterday.—You___it in the wrong place.A．must put B．should have putC．might put D．might have put3．If you behave well from now on, you ___ have an Apple Watch for your 18th birthday. A．will B．shall C．can D．must4．You ________ be Carol. You haven’t changed a bit after all the se years.A．must B．can C．will D．shall5．—I heard they went skiing in the mountains last winter.—It true because there was little snow there.A．may be not B．won’t be C．couldn’t be D．mustn’t be 6．According to the latest rule, people _______sort household garbage into four categories. A．can B．shall C．may D．need7．You ___________ a better mark, but you didn’t work hard.A．could have had B．would have had C．must have had D．must have8．You don’t look well, you __________ see the doctor.A．ought to B．mayC．can D．might9．There are still 30 minutes ____, so we ____ hurry with lunch.A．going…needn’t B．to leave…don’t need C．leaving…needn’t to D．to go…needn’t10．Mary is a bit shy and ____ a speech in public, which makes her lose the precious chance to do the voluntary job.A．dares not make B．doesn’t dare makeC．dare not to make D．dares not to make11．—I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.—Oh, it ________ my younger sister. She was in my room at that moment.A．must have been B．should have beenC．could have been D．may have been12．---We want someone to design the new art museum for me.---_____ the young fellow have a try?A．Shall B．May C．Will D．Need13．More and more countries have come to realize that the world____ do without Huawei and its "more advanced" technology.A．can’t B．needn’t C．mustn’t D．shouldn't 14．Mr. White _______ to hospital for an examination yesterday but he was too busy to come. A．should come B．should have come C．should be coming D．should had come 15．One of our rules is that every student _______ wear school uniform while at school. A．might B．couldC．shall D．will16．The weather turned out to be fine yesterday. I ____________ the trouble to carry my umbrella with me.A．should have taken B．could have takenC．n eedn’t have taken D．mustn’t have taken17．—Do you know where David is? I couldn’t find him anywhere.— Well. He ________ have gone far — his coat is still here.A．shouldn’t B．mustn’t C．can’t D．wouldn’t18．You _________ me about it earlier, but you didn't.A．should have told B．would have toldC．must have told D．should tell19．We lost our way in that small village, otherwise we ________more places of interest yesterday.A．visited B．had visitedC．would visit D．would have visited20．I____________ go to a summer camp during the summer vacation, but I am not sure. A．might B．can C．must D．need21．As you worked late last night, you __________ have come this morning.A．may not B．can’t C．mustn’t D．needn’t 22．—Sorry, Mum! I failed the job interview again.—Oh, it's too bad. You________ have made full preparations.A．must B．can C．would D．should23．It was so noisy that we hear ourselves speak.A．couldn’t B．shouldn’tC．mustn’t D．needn’t24．—May I smoke here?—If you _______, choose a seat in the smoking section.A．must B．should C．may D．can25．AI will surely be a feature of future life, but it _____ be used responsibly and in a proper way. A．can B．need C．must D．will【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】考查情景交际和情态动词。
高考英语新情态动词知识点易错题汇编及答案解析(5)
高考英语新情态动词知识点易错题汇编及答案解析(5)一、选择题1．He didn’t follow the doctor’s suggestions as required, but he _________.A．ought B．ought to C．ought to be D．ought to have 2．—What do you think of your boss?—He is easy-going most of the time, but sometimes he ________ be hard on us.A．should B．might C．can D．must3．They worked hard day and night during the next ten years ________ they ________ pay for the lost necklace.A．so…would B．so that…would C．in order that…could D．and…would 4．—Where is my dictionary?I remember I put it here yesterday.—You___it in the wrong place.A．must put B．should have putC．might put D．might have put5．—It’s so hot and uncomfortable here! Why are your windows still closed?—Oh, I’m not to blame. They ________ open.A．shan’t B．mustn’t C．won’t D．wo uldn’t6．No student ______go out of school after eleven o’clock at night without the teacher’s permission.A．will B．must C．may D．shall7．My computer ________ start this morning. There must have been something wrong with it. A．wouldn’t B．shouldn’t C．couldn’t D．mustn’t8．You ________ be Carol. You haven’t changed a bit after all these years.A．must B．can C．will D．shall9．--Is Jack still in hospital?--Yes. He _________ the bad food.A．wouldn’t eat B．shouldn’t eatC．wouldn’t have eaten D．shouldn’t have eaten10．–Will you read me a story, Mummy?--OK. You ______have one if you go to bed as soon as possible.A．might B．must C．could D．shall11．I didn’t hear the phone. I ___ asleep.A．must be B．must have beenC．should be D．should have been12．What a pity! Considering his ability and experience, he ___________ it better.A．need have done B．must have doneC．can have done D．might have done13．You ______ have been out last night, for all the lights in your room were not on. A．need B．must C．may D．should14．He did not regret saying what he did but felt that he _________ it differently.A．could express B．would expressC．could have expressed D．must have expressed15．She looks very happy. She_________ the exam.A．can have passed B．should have passed C．must have passed D．could have passed 16．AI will surely be a feature of future life, but it _____ be used responsibly and in a proper way. A．can B．need C．must D．will 17．(2018·北京) In today’s information age, the loss of data _________ cause serious problems for a company.A．need B．shouldC．can D．must18．Although passing the driving test ________ be difficult now, it’s worth the efforts.A．need B．shallC．can D．should19．He plays basketball very well. He_________ it a lot.A．may practise B．must practiseC．must have practised D．should have practiced20．I____________ go to a summer camp during the summer vacation, but I am not sure. A．might B．can C．must D．need21．I _________ my driving test but I didn’t operate carefully.A．should pass B．may passC．might have passed D．might pass22．—Do you know where Tony is?—He _________ in the living room. I saw him there just now.A．shall be B．should have been C．might have been D．must be23．The heavy rain may ______ the landslide last night.A．accounts for B．accounted forC．have accounted for D．accounting for24．—May I smoke here?—If you _______, choose a seat in the smoking section.A．must B．should C．may D．can 25．Although you ______ find bargains in London, it’s not generally a cheap place to shop. A．should B．need C．must D．can【参考答案】***试卷处理标记，请不要删除一、选择题1．D解析：D【解析】考查情态动词。
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高中英语语法精练2018年8月情态动词易错题1. “I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”A. should askB. should have askedC. must askD. must have asked2. “I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”A. must beB. must have beenC. might beD. can have been3. That car nearly hit me; I ______.A. might be killedB. might have been killedC. may be killedD. may been killed4. It’s a very kind offer, but I really _____ accept it.A. mustn’tB. needn’tC. can’tD. don’t5. The police still hav en’t found her, but they’re doing all they _____.A. mayB. canC. mustD. will6. You _____ practise the drums while the baby is sleeping.A. needn’tB. mightn’tC. mustn’tD. won’t7. You _____ him the news; he knew it already.A. needn’t tellB. needn’t have toldC. mightn’t tellD. mightn’t have told8. As she’s not here, I suppose she _____ home.A. must goB. must have goneC. might goD. might be going9. Are you still he re? You ______ home hours ago.A. should goB. should have goneC. might goD. may have gone10. “I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”A. must beB. must have beenC. might beD. can have been11. I _______ have met him a long time ago. Both his name and face are very familiar.A. mayB. canC. wouldD. should13. “Shall we go shopping?” “Sorry, we _______ buy anything now because none of t he shops are open.”A. mustn’tB. needn’tC. can’tD. shouldn’t14. They often go to the restaurants for meals. They _____ be very poor.A. mustn’tB. can’tC. may notD. needn’t15. I didn’t see her in the meeting room this morning. She ______ have spoken at the meeting.A. mustn’tB. shouldn’tC. needn’tD. couldn’t17. He ______ the test again, in which case, his mother will be very disappointed.A. might failB. must have failedC. should failD. could have failed18. “Why didn’t she come to the meeting yesterday?” “I’m not so sure. She ______ ill.”A. should beB. should have beenC. must beD. might have been19. Why did you just sit and watch? You _______ me.A. could helpB. should helpC. could have helpedD. must have helped20. “You ______ your teacher for help. He is kind-hearted.” “Yes. A whole day _______.”A. can ask, will wasteB. must have asked, had wastedC. could have asked, was wastedD. shouldn’t have asked, would be wasted21. “Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”A. mustB. mightC. wouldD. can22. “Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”A. might fall outB. could fall outC. should have fallen outD. must have fallen out23. “Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”A. must; couldB. may; mightC. need; mustD. could; need25. “Did Jim come?” “I don’t know. He _______ while I was out.”A. might have comeB. might comeC. mush have comeD. should have come答案与解析1. 选B，should 后接动词完成式表示“本来应该做某事，结果未做”，此处含有责备之意。
2. 选B，对过去情况的肯定推测，宜用“情态动词+ 动词完成式”，再根据句意，可确定答案为B。
注：can 表示推测通常不用于肯定陈述句。
3. 选B，表示过去可能发生而实际上未发生的事，用might + 动词完成式。
若只是推测过去可能已经发生的事，则可用may [might] + 动词完成式，如He may [might] have gone. 他可能已经走了。
4. 选C。
由句意可知。
5. 选B，do all one can 意为“尽力”或“竭尽全力”。
6. 选C，mustn’t 在此相当于can’t，且语气更强。
7. 选B，“needn’t + 动词完成式”的意思是：本来不必做某事，但实际上做了。
上句意思是“你本来不必告诉他这个消息的，因为他(当时)已经知道了”。
注意，句中knew 为过去式。
8. 选B，must 后接动词完成式表示对过去情况的肯定推测，意为“一定已经做了某事”。
9. 选B，should 后接动词完成式表示“本来应该做某事，结果未做”。
10. 选B，对过去情况的肯定推测，宜用“情态动词+ 动词完成式”，再根据句意，可确定答案为B。
注：can 表示推测通常不用于肯定句。
12. 选A。
may have done sth 表示对过去可能发生的事进行推测，意为“可能曾经”。
13. 选C。
根据上下文的语境推知。
can’t 意为“不能”。
14. 选B。
根据上下文的语境推知。
can’t 表推测，意为“不不能”。
16. 选D。
couldn’t have done sth 表示对过去情况进行推测，意为“过去不可能发生过某情况”。
17. 选A。
根据下文的will be 可知，“他考试再不及格”是将来的事，据此可排除B和D。
再根据语意，排除C。
18. 选D。
从时间上看，由于是昨天没来开会，所以推测他生病也应指昨天，故排除A 和C。
从语境上看，既然上文说I’m n ot so sure，那么说明说话者对自己的推测没有很大把握，故选D。
19. 选C。
根据上文的过去时态可知，此句谈的是过去的事，故排除A和C。
根据语境排除D。
20. 选C。
couldn’t have done sth 结构在此表示责备，指过去本来可以做某事但实际上未做。
第二空填was wasted，陈述的是过去的一事实。
21. 选B。
根据下文的I’ll phone the airport and find it out 可知，说话人对自己的推测没有很大把握，故选might。
若选A，语气太强，不合语境;若选D，不合语法习惯，因为can 表推测通常不用于肯定陈述句中。
22. 选D。
既然“通行证现在不在口袋里”，那么它“掉出去”应发生在过去，故排除A和B。
比较选项C和D所表示的意思，选D更恰当。
24. 选A。
根据Don’t be so sure 可知前面一空应填must。
第二空填的could表示推测，虽为过去式形式，但表示现在意义，语气较委婉，它与表推测的can 主要用于否定句和疑问句不同，它可以用于肯定陈述句。
25. 选A。
根据句中有关时态可知“他来”发生在过去，故排除B;根据I don’t know 可知选项C语气太肯定，不合适;选项D的意思是“本来应该来”，与语境不合。