高中情态动词和虚拟语气讲解与练习
高考英语总复习情态动词和虚拟语气练习题含解析
情态动词和虚拟语气专练1.—I don't really like James. Why did you invite him?—Don't worry. He__________come. He said he wasn't certain what his plans were.A. must notB.need notC.would notD.might not2.I__________sooner but I didn't know that they were waiting for me.A. had comeB.was comingC.would comeD.would have come3.—I left my handbag on the train, but luckily someone gave it to a railway official.—How unbelievable to get it back!I mean, someone__________it.A. will have stolenB.might have stolenC.should have stolenD.must have stolen4.—Shall I inform him of the change of the schedule right now?—I am afraid you__________,in case he comes late for the meeting.A. willB.mustC.mayD.can5.—What do you think of store shopping in the future?—Personally,I think it will exist along with home shopping but__________.A. will never replaceB.would never replaceC. will never be replacedD.would never be replaced6.—How's your new babysitter?—We__________ask for a better one. All our kids love her so much.A. shouldB.mightC.mustn'tD.couldn't7. If you__________smoke, please go outside because this is a non-smoking office.A. mustB.shouldC.canD.may8. The boss took no notice of the suggestion given by the clerk that the new technology __________the problems on conveying the products.A. be applied to solveB.apply to solvingC.applies to solvingD.applies to solve9.I__________the poor rabbit, but I didn't have the right drugs with me at that moment.A. savedB.had savedC.could saveD.could have saved10.—What do you think of Peter?—He __________be really difficult to get along with even though he's a nice person in general.A. shallB.shouldC.mustD.can11. Kunming is called“Spring City”, but it__________snow in winter.A. shallB.canC.mustD.might12.—It was Sunday today, and I__________up very early.—So you really had a good rest.A. didn't need to getB.needn't have gotC.needn't to getD.don't need get13.—Guess what! Tan Weiwei failed in the last round of the Super Girl Contest.—How __________it be? She is second to none in singing in my opinion.A. shallB.mightC.canD.must14.It has been announced that all the candidates __________remain in their seats until all the papers have been collected.A. canB. willC. shallD. should15. It __________be the postman at the door. It's only six o'clock.A. mustn'tB. can'tC. won'tD. needn't16. “The interests __________ be divided into four parts according to the agreement reached by both sides.”declared the judge.A. mustB. shouldC. shallD. can17. If the safety protections against the accidents__________, the miners__________a chance to survive then.A. were taken; would have hadB. had been taken; didn't haveC. had been taken; would have hadD. were taken; would have18. He commanded that all the gates __________.A. should shutB. would be shutC. shutD. be shut19. If the printer__________ break down under guarantee, we would repair it at our expense.A. mayB. couldC. mightD. should20.—Why didn't you go to help her?—I __________ , but I __________seriously ill.A. would have; would be B would; wereC. would have; wasD. would; had21. __________ it rain tomorrow, we would have to __________ the spring outing.A. Should; call offB. Were; take upC. Should; take upD. Were; call off22.It's beyond our imagination that Jim, who tops the class in English, __________have difficulty translating the simple sentence.A. shallB. mightC. shouldD. must23. He __________ away before we arrived, since the house was deserted.A. shall have goneB. should have goneC. could have goneD. must have gone24. Look ! Tom is too sleepy to work. He __________ up watching TV.A. mustn't have stayedB. shouldn't have stayedC. mustn't stayD. ought not to stay25. Without the heavy traffic, the police __________ the thieves who tried to escape in the stolen car.A. would not catchB. couldn't have caughtC. haven't caughtD. couldn't catch26. Since everybody will make a mistake, we __________at whoever makes a mistake.A. ought to have laughedB. oughtn't to laughC. ought to laughD. should not to laugh27.—Hurry up! There is little time left before the train leaves.—We __________ take a taxi, Dad.A. couldB. mustC. mayD. should28. Nuclear__________ be really dangerous at times even though it's a nice energy in general.A. shallB. shouldC. canD. must29. In Stankovic Cup final, China __________ the game with a win but Yi Jianlian missed two of free throws before Turkey's Sonkol Umit tied the scoring 69-9 to force the game into overtime. A. could finish B. would finishC. would have finishedD. could have finished30. But for my friends' help, our team __________the game last evening.A.can loseB. will loseC. had lostD. would have lost31.—Do you think Mary's husband is over there?—No, it __________be her husband. He never wears glasses.A. can'tB. must notC. won'tD. may not32.—I stayed at a hotel while in New York.—Oh, did you? You __________ with Barbara. .A. could have stayedB.must have stayedC. need have stayedD. may have stayed33. How time flies! If only I __________as young as you are.A. beingB. amC. beD. were34. At the meeting, every teacher insisted that the prizes__________to the young student.A. presentedB. would presentC. be presentedD. were presented35.—I had much trouble working out the answer to that problem this morning.—__________my suggestion, you __________little trouble with such difficult problems.A. If you had followed; would have hadB. If you followed; would haveC. If you had followed; would haveD. If you listen; will have答案及解析1．D解析：考查情态动词的用法。
虚拟语气与情态动词的区别及用法解析
虚拟语气与情态动词的区别及用法解析虚拟语气和情态动词是语法中两个不同的概念，但在一些语法规则和用法上有一些相似之处。
虚拟语气是一种用来表示假设、愿望、建议、要求等非现实情况的语气，它并不是真实存在的，而是对虚构的事件或状态进行描述。
而情态动词则是一类用于表示说话人的态度、推测、能力、许可等情态意义的动词。
一、虚拟语气的用法1. 假设虚拟语气经常用于表示虚拟的假设情况，即与事实相反或不可能实现的情况。
常见的虚拟语气形式包括“如果…（过去式）”，“要是…（过去式）”等。
例如：- If I were a bird, I would fly freely in the sky.如果我是一只鸟，我就可以在天空中自由飞翔。
2. 愿望虚拟语气还可以用于表示愿望，即对现实情况的一种虚构或想象。
常见的虚拟语气形式包括“希望…（过去式）”，“但愿…（过去式）”等。
例如：- I wish I had studied harder last night.我希望昨晚学习更努力一些。
3. 建议、要求虚拟语气还可以用于表示建议、要求等情况。
常见的虚拟语气形式包括“（要求、建议）+过去式”。
例如：- The doctor suggested that I take some rest.医生建议我休息一下。
二、情态动词的用法1. 表示能力、推测情态动词可以用来表示说话人的能力或对某种情况的判断。
常见的情态动词有can、could、may、might等。
例如：- She can swim very well.她游泳技术非常好。
2. 表示许可、允许情态动词还可以表示许可或允许的意思。
常见的情态动词有can、may等。
例如：- Can I borrow your pen?我能借用你的笔吗？3. 表示义务、应该情态动词也可以表示说话人对某种行为或义务的责任或要求。
常见的情态动词有should、ought to等。
例如：- You should apologize to him for your mistake.你应该为你的错误向他道歉。
高一英语情态动词虚拟语气深度辨析与语法点详解单选题50题
高一英语情态动词虚拟语气深度辨析与语法点详解单选题50题1. You ______ be tired after such a long journey.A. canB. mayC. mustD. should答案：C。
解析：must用于表示肯定的推测，根据“after such a long journey”（经过这么长的旅程），可以推断出“你一定很累”。
can表示能力或可能性，在这里不符合语境。
may表示可能性，语气较弱，没有must肯定。
should表示应该，也不符合此处推测很累的语境。
2. I'm not sure where Tom is. He ______ be in the library.A. canB. mightC. mustD. would答案：B。
解析：might表示可能性，用于不太确定的推测，句中说“我不确定汤姆在哪里”，所以“他可能在图书馆”这种推测是不太确定的。
can表示能力或理论上的可能性，在这里不适用。
must表示肯定的推测，与前面的“not sure”矛盾。
would表示过去将来或虚拟语气等，不符合此处语境。
3. ______ you pass me the salt?A. CanB. MayC. MustD. Should答案：A。
解析：can在这里表示请求，用于询问对方是否有能力做某事，即“你能递给我盐吗”。
May也可表示请求，但通常用于正式或礼貌的场合，这里用can更口语化、更常用。
Must表示必须，不符合请求的语境。
Should表示应该，也不符合题意。
4. She ______ speak three languages when she was ten.A. canB. couldC. mayD. might答案：B。
解析：could是can的过去式，表示过去的能力，句中说“当她十岁的时候”，是过去的时间，“她能说三种语言”，这里要用过去式could。
2024届高考英语复习易错题专项(情态动词和虚拟语气)练习(附答案)
2024届高考英语复习易错题专项(情态动词和虚拟语气)练习1．（2021ꞏ天津ꞏ高考真题）---I honestly don't think I'm going to be admitted.---Well, you never know! You________ a better impression than you think.A．may have madeB．should have madeC．couldn't have madeD．needn't have made2.（2020·江苏卷）If I hadn’t been faced with so many barriers, I _____where I am.A. won’t beB. wouldn’t have beenC. wouldn’t beD. shouldn’t have been3．（2020ꞏ天津ꞏ高考真题）You ____________ have scolded him for his poor performance. After all, he had done his best.A．must B．should C．mustn’t D．shouldn't4．（2020ꞏ天津ꞏ高考真题）Jim says we ______ stay in his house as long as we leave it clean and tidy .A．must B．can C．need D．Should5．（2017ꞏ全国ꞏ统考高考真题）Whale breathe through lungs just as we humans do，sothey_______come up for air．A．may B．can C．might D．Must6．（2018ꞏ天津ꞏ统考高考真题）Jane wishes that she ______ foreign trade instead of literature when she was in college.A．studied B．had studiedC．would study D．might have studied7．（2019ꞏ江苏ꞏ高考真题）What a pity! You missed the sightseeing, or we ________ a good time together.A．had B．will have C．would have had D．had had8．（2023ꞏ天津ꞏ高三耀华中学校考开学考试）—Why you be talking so loudly while others are studying?—I’m terribly sorry.A．shall B．must C．will D．May9．（2023ꞏ天津滨海新ꞏ统考三模）Waking up suddenly________lead to rapid heart rate and high blood pressure.A．must B．would C．can D．Shall10．（2023秋ꞏ高三课前预习）—Finish the homework in half an hour! Mom, you________be joking! — Nothing is impossible if you put your heart into it.A．need B．can C．must D．May11．（2023ꞏ天津河东ꞏ统考二模）“Those responsible for the accident be punished while those contributing to solving the problems be rewarded.” promised the official then and there.A．need B．shall C．must D．Should12．（2023ꞏ全国ꞏ高三专题练习）My little son _____ out alone at night.A．dares not go B．dares not to goC．dare not to go D．doesn’t dare to go13．（2023ꞏ天津滨海新ꞏ高三大港一中校考期末）The world went into shock, most people havingassumed that this space flight ________ be more dangerous than travelling in an aeroplane.A．should B．shall C．would D．Could14．（2023ꞏ天津河东ꞏ高三统考期末）If there is nothing more to do, we ________ as well go to bed.A．should B．can C．would D．May15．（2023ꞏ天津ꞏ高三天津市咸水沽第一中学校考期末）I ______ James some advice, but I didn’t think he would accept it under those conditions.A．could have given B．mustn’t giveC．couldn’t give D．must have given参考答案1．（2021ꞏ天津ꞏ高考真题）---I honestly don't think I'm going to be admitted.---Well, you never know! You________ a better impression than you think.A．may have madeB．should have madeC．couldn't have madeD．needn't have made【答案】A【答案解析】考查情态动词用法。
高考英语二轮复习情态动词和虚拟语气考点讲解含解析
情态动词和虚拟语气第一部分、情态动词一、can/could与be able to1．can/could用来表示“一般能力”；be able to有多种时态,且用来表示在特定条件下的“具体能力”.如：My grandma is over seventy,but she can still read without glasses.They will be able to tell you the news soon.He was able to flee Europe before the war broke out.2．表示允许可用can或could,与may/might意义接近.could可用于现在时,只是语气更加委婉、客气,回答时则一般要用can而不用could.—Could I have the television on?—Yes,you can./No,you can't.二、may与might1．表示允许,意为“可以,许可”,用法基本上同can与could.如：May I use your bicycle?2．表示可能性,意为“也许,可能”.如：According to the weather forecast, it may rain tomorrow.3．may可以放在句首,表示祝愿.如：May good luck be yours!三、must与have to1．must用来表示说话人的主观看法；have to表示客观的需要,强调外界压力,不得已而为之.如：He said that they must work hard.他说他们必须努力工作.(主观上要做这件事)My brother was ill, so I had to call the doctor in the middle of the night.我弟弟生病了,我只得半夜里把医生请来.(客观上需要做这件事)2．表示“不必”,须用don't have to或needn't.must的否定式表示“禁止,绝对不可”.如：You don't have to tell him about it.你不必告诉他那件事.You mustn't tell him about it.你绝不能告诉他那件事.—Must we do it now?我们必须现在做吗？—No, you needn't.不,你们不必.四、shall1．用于第一、第三人称的疑问句中,用来征求对方的意见或请求指示.如：What shall he do next?他下一步干什么呢？2．用于第二、第三人称的陈述句中,表示说话人的意愿,有“命令、警告、允诺、威胁、强制”等意思.如：He shall stay in bed.他必须躺在床上.You shall have it back next week.下周一定还你.He says he won't go, but I say he shall.他说他不去,但我说他必须去.五、will与would1．will用于各种人称,表示“意志、意愿”或“决心”等.如：If you will keep your watch half an hour slow, it is hardly surprising that you are late for your appointments.如果你想要让你的表慢半个小时,你约会时迟到就不足为怪了.2．will表示习惯性的动作,有“总是,惯于”的含义.如：An Englishman will usually show you the way in the street.英国人通常是会在街上给你指路的.3．would可表示过去反复发生的动作.如：On Sundays he would get up early and go fishing.星期天他总是早起去钓鱼.六、should与ought to1．should表示“建议”或“劝告”,有“应该”之意.如：You should learn from each other.2．ought to表示根据某种义务或必要“应当”做某事.如：Everyone ought to obey the traffic regulations.3．should和ought to也可用来表示推测,意为“想必会……”.如：—When can I come for the photos? I need them tomorrow afternoon.—They should be ready by 1200.七、情态动词表示推测1．can用于肯定句中表示客观的可能性,意为“有时会”；用于疑问句中可以表示推测,意为“可能”,有时表示一种惊讶的语气；用于否定句中也可以表示推测,can't意为“不可能”,语气很强烈.It is usually warm in my hometown in March, but it can be rather cold sometimes.我的家乡在三月份通常很暖和,但有时候也会相当冷.Mr. Bush is on time for everything. How can it be that he was late for the meeting?布什先生做什么事情都很准时,他怎么可能开会迟到呢？—Let's visit Tom together, Stephen.—There's no need to do so. He can't be at home, because I saw him board the flight to Beijing this morning.——Stephen,咱们一起拜访汤姆吧.——没必要这样做.他一定不在家,因为今天早晨我看见他登上了飞往北京的航班.2．may/might用于肯定句中可以用来表示不十分肯定的推测,意为“有可能”；用于否定句中也可以表示推测,may not意为“可能不”,表示一种不太确定的语气.The traffic is heavy these days. I might arrive a bit late, so could you save me a place?这些天交通很繁忙,我可能会来晚一点,请你帮我保留个位置好吗？3．must表示推测时只能用于肯定句中,意为“一定,必定”,表示十分肯定的语气(在疑问句中或否定句中要用can/could).—It's the office! So you must know eating is not allowed here.—Oh, sorry.——这是办公室！所以你一定知道这里不许吃东西.——噢,对不起.4．should用来表示推测时意为“应该”,即含有“按道理来说应当如此”的意思.There shouldn't be any difficulty about passing the road test since you have practiced a lotin the driving school.因为你在驾校训练了这么多,通过路考应该没什么困难.八、“情态动词＋have done”结构1．should/ought to＋have done,表示“过去本应该做而(实际)没有做的事情”,含有责备或遗憾的语气,意为“本应该……”.其否定形式为“should not/ought not to have＋done”,表示某种行为本不该发生但实际上发生了.I shouldn't have watched that movie—it'll give me horrible dreams.我本不应该看那部电影——它会令我做噩梦.You ought to have come to the party yesterday, but why didn't you come?昨天你本来应该参加聚会的,可是你为什么不来？2．must＋have done,用于肯定句,表示“过去一定做过某事”,表示一种很有把握的推测.注意,对过去发生的情况的否定推测常用“can't/couldn't＋have done”表示.—Ye Shiwen won two gold medals in London Olympic Games.—She must have gone through tough training.——叶诗文在伦敦奥运会获得了两枚金牌.——她肯定受到严格的训练.—Do you know where David is? I couldn't find him anywhere.—Well. He can't have gone far—his coat's still here.——你知道大卫在哪里吗？我到处找不到他.——大卫的上衣还在这里,因此他肯定没走远.3．needn't＋have done,表示“过去没有必要做某事,但实际上做了某事”.Mark needn't have hurried. After driving at top speed, he arrived half an hour early.马克本没必要那么匆忙.他以最快速度开车,结果早到了半个小时.4．may/might＋have done,表示对过去情况的一种不太有把握的可能性的推测,表示“可能已做了某事……”,否定句表示“可能还没有……”.Sorry, I'm late. I might have turned off the alarm clock and gone back to sleep again.对不起,我迟到了.我可能把闹钟关掉后又睡着了.5．could＋have done表示“过去本来可以做某事,但实际上没有做”；can/could＋have done表示“过去可能做了某件事”.I could have saved the poor rabbit, but I didn't have the right drugs with me at that moment.我本来可以拯救那只可怜的兔子的,可是我当时没有合适的药品.第二部分、虚拟语气一、虚拟语气在虚拟条件句中的用法1.在具体运用中,条件从句中有时可省略if而采用倒装结构.如：Had it not been for your help, we wouldn't have achieved so much.2．介词without/but for、连词but、副词otherwise常用来表示某种假设条件.如：I wouldn't have made such rapid progress without your help.3．有时候从句动作和主句动作发生的时间不一致,这时谓语动词的形式要根据各自的时间来调整.如：If the weather had been more favourable, the crops would be growing still better.二、“should＋动词原形”表示的虚拟语气这一类型常见词有“一坚持(insist)、二命令(order, command)、三建议(advise, suggest, propose)、四要求(request, require, demand, desire)”.以上词及其派生名词所接的名词性从句都使用“(should ＋)动词原形”的虚拟语气.①Jane's pale face suggested that she was ill, and her mother suggested that she(should) havea medical examination.简苍白的脸色表明她病了,她母亲建议她去检查身体.②She insisted that the man had stolen her car and that he(should) be sent to prison.她坚持说那个男人偷了她的车,并坚决要求他坐牢.三、特殊句式中的虚拟语气If only/It's (high) time (that)．..wish/would rather/as if等固定句式要求用相应的虚拟语气表达形式.①I wish I could fly.真希望我能飞.②I would rather you came tomorrow.我宁愿你明天来.③If only I had taken your advice!要是听从了你的建议该多好啊！高频考点一、考查情态动词例1．（2018·北京卷）In today’s information age, the loss of data _________ cause serious problems for a company.A. needB. shouldC. canD. must【答案】C【解析】考查情态动词.句意：在今天的信息时代,数据的丢失有时会对一个公司造成严重的问题.数据丢失造成严重问题是客观上会发生的情况,即“客观可能性”,故该空应用情态动词can.C选项正确.其余情态动词均没有该用法.need需要；should应该,竟然；must必须,肯定.【变式探究】—Can’t you stay a little longer?—It’s getting late. I reall y _____go now, My daughter is home alone.A .mayB .canC . mustD .dare【答案】C【解析】句意：——你不能再多待会儿吗?——很晚了,我必须得走了.我女儿一个人在家.A. may可能,可以,也许；B. can能,会；C. must必须,必然要,必定会；D. dare敢,胆敢.结合句意,故选C.【变式探究】________ I have a word with you? It won’t take long.A. CanB. MustC. ShallD. Should【答案】A【解析】本题考察的是情态动词基本意义辨析.Can能够,可能；must必须,一定；非得；shall将要；should应该；句意：我可以和你谈谈吗？不会花很多时间的.根据句意可知本题使用can I…？表示询问对方是否允许.如：Can I use your dictionary?我可以使用你的字典吗？故A正确.高频考点二、考查情态动词的用法例2. （2018·天津卷） I can't find my purse. I___________ it in the supermarket yesterday, but I'm not sure.A. should leaveB. must have leftC. might leaveD. could have left【答案】D【解析】考查情态动词表推测.句意：我不能找到我的钱包了,昨天我有可能把它落到超市了,但我不确定.根据句中时间状语yesterday可知,是对过去事情的推测,故用情态动词+ have done,再根据后句but I’m not sure.可知,此推测为不能肯定的推测,故用情态动词could,表示“可能”.故选D.【变式探究】（2017•天津）My room is a mess, but I __________clean it before I go out tonight.I can do it in the morning.A. daren’tB. shouldn’tC. needn’tD. mustn’t【答案】C【解析】句意：我的房间很乱,但是在今晚我出去之前不需要打扫,我可以明天早晨再打扫.A.不敢；B.不应该；C不需要；D.不许.根据句意,故选C.【变式探究】Why didn't you tell me about your trouble last week？If you ________(tell)me,I could have helped.【答案】had told【解析】句意：上个星期你为什么不告诉我你的麻烦事？如果你告诉我了,我就能帮你.根据句意和相关信息判断,条件句表示与过去事实相反的假设,此时从句用过去完成时,主句谓语用“情态动词＋have done”形式.【变式探究】I ______ have worried before I came to the new school, for my classmates here are very friendly to me.A. mightn’tB. mustn’tC. needn’tD. couldn’t【答案】C【解析】句意：我来新学校之前本没有必要担心,因为在这里我的同学对我非常友好.needn’t have done本没有必要做某事,表示实际上已经做了某事.根据句意可知选C.高频考点三、考查虚拟语气例3．(2019·天津卷)The workers were not better organized, otherwise they ________ the task in half the time.A．accomplished B．had accomplishedC．would accomplish D．would have accomplished【答案】D【解析】考查虚拟语气.句意：工人们没有被组织好,否则的话他们会用那一半的时间完成任务的.此处otherwise表达了一种含蓄虚拟；otherwise前的内容所述的是过去的事实,相当于if引导的条件状语从句“If the workers had been better organized”,因此后半部分应用“主语＋would have done sth.”的结构.故选D.【举一反三】【2018·江苏】It’s strange that he _______have taken the books without the owner’s permission.A. wouldB. shouldC. couldD. might【答案】B【解析】考查虚拟语气.句意：真奇怪,他竟然没有主人的允许就拿走了这些书.在句型”It is important/necessary/strange/impossible/natural that...”中,其中由that引导的主语从句通常用“should+动词原形”这样的虚拟语气,其中的should可以省略.故选B.【变式探究】（2017·北京）If the new safety system _______ to use, the accident would never have happened.A. had been putB. were putC. should be putD. would be put【答案】A【解析】句意：如果这个新的安全系统被投入使用过的话,这个事故就不会发生了.根据主句确定是对过去情况的虚拟,所以从句谓语用had done形式,此外根据句意可知是被动,用被动语态,故A项是正确的.【变式探究】________(have)the governments and scientists not worked together,AIDSrelated deaths would not have fallen since their highest in 2005.【答案】Had【解析】句意：如果政府和科学家不共同努力,与艾滋病相关的死亡就不会从2005年的最高点下降.这是一个省略了从属连词if的虚拟语气句,使用了倒装句式.根据主句的would not have fallen可知,这里是表示过去的虚拟语气,所以用had.【变式探究】Without his wartime experiences, Hemingway____ his famous novel A Farewell to Arms.A.didn’t writeB. hadn’t writtenC. wouldn’t w riteD. wouldn’t have written【答案】D【解析】句意：没有他战时的经验,海明威就不可能写出著名的小说永别了武器.根据without his wartime experience没有战时的经历,可知表示对于过去的否定猜测,故主句用would have done,因此选D 项.1．(2019·天津卷)The workers were not better organized, otherwise they ________ the task in half the time.A．accomplished B．had accomplishedC．would accomplish D．would have accomplished【答案】D【解析】考查虚拟语气.句意：工人们没有被组织好,否则的话他们会用那一半的时间完成任务的.此处otherwise表达了一种含蓄虚拟；otherwise前的内容所述的是过去的事实,相当于if引导的条件状语从句“If the workers had been better organized”,因此后半部分应用“主语＋would have done sth.”的结构.故选D.2．(2019·江苏卷)What a pity! You missed the sightseeing, or we ________ a good time together.A．had B．will haveC．would have had D．had had【答案】C【解析】考查虚拟语气.句意：多么遗憾！你错过了这次游览.否则,我们就可以一起度过一段愉快的时光.根据关键词or可知,这里表示与过去的事实相反,谓语动词应用would/could/should/might＋have done.1.【2018·江苏】 There is a good social life in the village, and I wish I _______ a second chance to become more involved.A. hadB. will haveC. would have hadD. have had【答案】A【解析】考查虚拟语气.句意：在这个村里有很好的社交生活,并且我希望我再有机会去更多的参与.本题考查wish引导的宾语从句,表示与现在事实相反的愿望,所以从句用一般过去时.故选A.2.【2018·江苏】It’s strange that he _______have taken the books without the owner’s permission.A. wouldB. shouldC. couldD. might【答案】B【解析】考查虚拟语气.句意：真奇怪,他竟然没有主人的允许就拿走了这些书.在句型”It isimport ant/necessary/strange/impossible/natural that...”中,其中由that引导的主语从句通常用“should+动词原形”这样的虚拟语气,其中的should可以省略.故选B.3.（2018·天津卷） I can't find my purse. I___________ it in the supermarket yesterday, but I'm not sure.A. should leaveB. must have leftC. might leaveD. could have left【答案】D【解析】考查情态动词表推测.句意：我不能找到我的钱包了,昨天我有可能把它落到超市了,但我不确定.根据句中时间状语yesterday可知,是对过去事情的推测,故用情态动词+ have done,再根据后句but I’m not sure.可知,此推测为不能肯定的推测,故用情态动词could,表示“可能”.故选D.4.（2018·北京卷）In today’s information age, the loss of data _________ cause serious problems for a company.A. needB. shouldC. canD. must【答案】C【解析】考查情态动词.句意：在今天的信息时代,数据的丢失有时会对一个公司造成严重的问题.数据丢失造成严重问题是客观上会发生的情况,即“客观可能性”,故该空应用情态动词can.C选项正确.其余情态动词均没有该用法.need需要；should应该,竟然；must必须,肯定.5.（2018·北京卷）They might have found a better hotel if they _________ a few more kilometers.A. droveB. would driveC. were to driveD. had driven【答案】D【解析】考查虚拟语气.句意：如果他们多开几公里的话,他们也许会找到一个更好的旅馆.由“they might have found a better hotel”可知,该句是表示对过去的虚拟.if ____ a few more kilometers是条件句部分,表示对过去的虚拟,条件句部分要用过去完成时态,故D选项正确.1．（2017·北京）Samuel, the tallest boy in our class, ______ easily reach the books on the top shelf.A. mustB. shouldC. canD. need【答案】C【解析】A. must 必须 B. should 应该 C. can 能 D. need 需要.句意:Samuel,我班最高的男生,能很轻松地够着书架顶上的书,此处需要一个表示能力的词,故用can,答案为C.2．（2017•天津）My room is a mess, but I __________clean it before I go out tonight. I can do it in the morning.A. daren’tB. shouldn’tC. needn’tD. mustn’t【答案】C【解析】句意：我的房间很乱,但是在今晚我出去之前不需要打扫,我可以明天早晨再打扫.A.不敢；B.不应该；C不需要；D.不许.根据句意,故选C.3．（2017•江苏） _______ not for the support of the teachers, the student could not overcome her difficulty.A. It wereB. Were itC. It wasD. Was it【答案】B【解析】考查虚拟语气和倒装.虚拟语气中,be动词统一用were；虚拟语气的省略形式主要是把if省略,同时把were/should/had提前,即Were /Should/ Had I...,故选B.句意：要不是老师们的支持,该生是无法克服她自己的困难的.4．(2017·江苏卷) ____________ not for the support of the teachers, the student could not overcome her difficulty.A. It wereB. Were itC. It wasD. Was it【答案】B【解析】考查虚拟语气的省略.虚拟语气中,be动词统一用were；虚拟语气的省略形式主要是把if省略,同时把were/should/had提前,即Were /Should/ Had I...,故选B.5．（2017•江苏） _______ not for the support of the teachers, the student could not overcomeher difficulty.A. It wereB. Were itC. It wasD. Was it【答案】B【解析】考查虚拟语气和倒装.虚拟语气中,be动词统一用were；虚拟语气的省略形式主要是把if省略,同时把were/should/had提前,即Were /Should/ Had I...,故选B.句意：要不是老师们的支持,该生是无法克服她自己的困难的.6．（2017·北京）If the new safety system _______ to use, the accident would never have happened.A. had been putB. were putC. should be putD. would be put【答案】A【解析】句意：如果这个新的安全系统被投入使用过的话,这个事故就不会发生了.根据主句确定是对过去情况的虚拟,所以从句谓语用had done形式,此外根据句意可知是被动,用被动语态,故A项是正确的.1．(2016·浙江,15)________(have)the governments and scientists not worked together,AIDSrelated deaths would not have fallen since their highest in 2005.【答案】Had【解析】句意：如果政府和科学家不共同努力,与艾滋病相关的死亡就不会从2005年的最高点下降.这是一个省略了从属连词if的虚拟语气句,使用了倒装句式.根据主句的would not have fallen可知,这里是表示过去的虚拟语气,所以用had.2．(2016·浙江,17)George can't ________(go)too far.His coffee is still warm.【答案】have gone【解析】句意：乔治不可能走得太远了.他的咖啡仍然是温的.can't have done是对过去的否定推测.3．(2016·北京,34)Why didn't you tell me about your trouble last week？If you ________(tell)me,I could have helped.【答案】had told【解析】句意：上个星期你为什么不告诉我你的麻烦事？如果你告诉我了,我就能帮你.根据句意和相关信息判断,条件句表示与过去事实相反的假设,此时从句用过去完成时,主句谓语用“情态动词＋have done”形式.。
高考英语练习 情态动词和虚拟语气(讲解部分)
与将来事 实相反
①过去式 ②should+动词原形 ③were to+动词原形
would/should/could/ might+动词原形
If he shouldn't come tomorrow, we would put off the meeting.如果他明天不 来,我们就推迟这个会议。
周末给她打电话。
may,might 表示推测,用于肯定句,意为 “可能”,may not意为“可能不”, 如表 达“不可能”则用can't
This coat may be Peter's.这件大衣可能是彼得的。 This coat may not be Peter's.这件大衣可能不是彼得的。
may表示祝愿
表示理论上的可能时可用于肯定句。could表 Accidents can happen in this weather. 这种天气可
示推测时比can可能性小,可用于肯定句、否定 能会发生事故。(理论上的可能性)
句和疑问句
It could be weeks before we get a reply. 我们可能
2.用于“(should+)动词原形”结构的虚拟语气 (1)用于宾语从句中 以下动词后的宾语从句常常使用虚拟语气,即谓语为“(should+)动词原 形”。
6.will,would
用法
例句
用于各种人称,表示主语的意愿和意志
He will/would take you home.他愿意送你回家。
与第二人称的一般疑问句连用,表示请求、建议 Will/Would you go with me?你愿意和我一起去 吗?
情态动词与虚拟语气讲解及练习题
情态动词与虚拟语气四川省达州市第一中学张国龙一. 含义和特征1. 含义: 情态动词是表示情态意义的动词, 它表示说话人的语气和情态, 它不能单独作谓语, 必须与实义动词一起构成谓语, 情态动词没有人称和数的变化。
2. 特征: ①有词义但不完整, 不能单独作谓语, 要跟实意动词或系动词的原形作谓语。
②除have to外, 可适用于各种人称和数。
③有些情态动词有过去式。
二. 基本用法1. can/ could和be able to ①can/ could表示能力, 这时could 为can 的过去时。
I can climb the cliff. He can drive a car. We could sing the song when I was young. ②表示许可。
You can sit here. The plane can take off now. 在疑问句中could比can委婉, 回答用can。
Can/ Could I come here tomorrow? Yes, you can. ③表示“有时候可能会”。
Even an experienced teacher can make a mistake. To stay here could be better. ④表示说话人的推测、怀疑、惊异、猜测、不肯定或不耐烦等，主要用于否定句, 疑问句或感叹句中。
The story can’t be true. How could you be so careless! Where can he go? ⑤cannot…too/ enough意为无论怎么…也不过分, 越…越好。
You cannot be too careful. You cannot remember enough English words.⑥can和be able to都表示能力, 意思上没多大区别。
can只有can和could两种形式, 而be able to则有am/ is/ are/ was/ were able to, will/ shall be able to, have/ has/ had been able to等形式。
专题03 情态动词和虚拟语气(解析版)(全国通用版)-高考英语复习
专题03 情态动词和虚拟语态情态动词★ 情态动词：can, could, may, might, must, ought to, shall, will, would, need ,dare1. 表示推测的情态动词1.1基本原则：1.1.2 对现在或将来情况推测，用情态动词+do / be / be doing…对过去的推测，用情态动词+have done / been…1.1.3表示肯定推测的情态动词,按可能性由大到小依次为:must> should / oughtto>may>might>could1.1.4否定推测，按语气由强到弱依次为：can’t / couldn’t（根本不可能）>may not> mightnot/could not(可能不)。
1.2 具体用法：1.2.1 must be表示推测，意为“一定是……” 只用于肯定句中must have done意为“一定做过某事或某事肯定发生了” 并且有前文铺垫e.g. Listen! There must be some children in the room.The road is wet. It must have rained last night.1.2.2 should (not) / ought (not) to在中表示根据常规或常识推测，表示“某事应该或不应该发生”e.g. It is nearly 7 o’clock. Jack should be here at any moment.You shouldn’t be texting in the class now. We are having a lesson.(should not 含有责备之意)1.2.3 can, could表达推测时，一般用于疑问句和否定句中；can用于肯定句中表示一种理论上的可能性，意为“有时候会…”，并不牵涉是否真的会发生；could用于肯定句中，语气比may/ might更弱。
高中英语虚拟语气讲解及练习题(附答案)
高中英语虚拟语气讲解及练习虚拟条件句就是对现实条件的一种虚拟假设，所假设的条件一般不符合事实或与事实相反或在现实中发生的可能性极小。
根据时间的不同，虚拟条件句可分为三种，即与现在事实相反的虚拟条件句、与过去事实相反的虚拟条件句（1）表示与现在事实相反If I had enough money now, I would lend it to you.（2）表示与过去事实相反If he had taken your advice, he wouldn’t have made such a bad mistake.（3）表示与将来事实相反I would go shopping with you if it were to be Sunday tomorrow.1. 虚拟条件句的倒装在虚拟条件句中，为了强调所假设条件的虚拟性，或突出说话人的一种主观愿望，虚拟条件句可用倒装结构。
虚拟条件句的倒装是通过去掉if，把条件从句谓语中的助动词、情态动词或系动词放在句首实现的。
例如：Had I been（= If I had been ） in that situation， I would not have let the thief escape away with so much money.Should there be （= If there should be） a drought， what should we do at that time ？2. 错综时间条件句有时条件从句的动作和主句的动作发生的时间并不一致，这时谓语动词的形式应根据它所要表示的具体时间来确定。
例如：If we hadn’t been working hard in the past few years ，thing s wouldn’t be going so smoothly.3. 含蓄条件句有时假设的情况并不以条件从句的形式表现出来，而是通过某个介词或介词短语（如：with，otherwise，without，but for，in that position）、上下文或其它方式表现出来。
专题07 情态动词和虚拟语气(讲义)
专题07 情态动词和虚拟语气(讲义)目录考点情态动词和虚拟语气---------------------------------------------------------------------------------------------------------1页---------------------------------------------------------------------------=------------------------------------------1页------------------------------------------------------------------------------------------------------------------------2页【真题研析·规律探寻】-----------------------------------------------------------------------------------------------------2页考向1考查情态动词的基本用法----------------------------------------------------------------------------------------------------------------2页考向2考查情态动词的基本含义及用法--------------------------------------------------------------------------------------------------------2页考向3考查虚拟语气中----------------------------------------------------------------------------------------------------------------------------3页【核心提炼·考向探究】----------------------------------------------------------------------------------------------------3页1．情态动词的基本用法----------------------------------------------------------------------------------3页2．情态动词后跟完成式的用法----------------------------------------------------------------------------7页3．虚拟语气的常用用法-------------------------------------------------------------------------------------------------------------------------------------7页【题型特训·命题猜测】-------------------------------------------------------------------------------------------------------------7页猜测考向1 考查情态动词的基本用法----------------------------------------------------------------------------------------------------------------8页猜测考向2 考查情态动词+完成式的用法-----------------------------------------------------------------------------------------------------------8页猜测考向3 考查虚拟语气--------------------------------------------------------------------------------------------------------------------------------8页考点 情态动词和虚拟语气考情分析：分析2021-2023年新高考有关情态动词和虚拟语气的考向分布。
专题07 情态动词和虚拟语气(练习)(解析版)
专题07 情态动词和虚拟语气目录情态动词和虚拟语气--------------------------------------------------------------------------------------------2页一、单项填空---------------------------------------------------------------------------------------------------------------------2页二、完成句子--------------------------------------------------------------------------------------------------------------------6页三、单句语法填空--------------------------------------------------------------------------------------------------------------8页情态动词和虚拟语气一、单项填空1．（2024·天津市南开区期中）—______ you make so much noise?—Sorry. I’ll take care not to.A．Must B．Can C．May D．Would【答案】A【解析】考查情态动词。
句意：--你一定要制造这么大的噪音吗？--对不起。
我会注意不要这样做。
A. Must一定；非得；B. Can能够；C. May或许；D. Would将会。
根据空后“you make so much noise?”可知，此处表示说话人不耐烦的语气。
must表示与说话人愿望相反或不耐烦，意为“一定要，非要”。
故选A。
2．（2024·湖南省株洲市单招）—_________you come with me to Lang Lang’s piano concert this evening?—I’d love to, but I have to study for my math test.A．Should B．May C．Must D．Can【答案】D【解析】考查情态动词。
高一英语虚拟语气与情态动词试题答案及解析
高一英语虚拟语气与情态动词试题答案及解析1. I insisted that a doctor ________ immediately.A．has been sent for B．sends for C．be sent for D．will be sent for【答案】C【解析】考查虚拟语气：句意：我坚持要求医生要立刻派人去请。
Insist表示“坚持要求”的时候，从句的谓语用虚拟语气，使用should do，should可以省略，因为医生是被派人去请，所以用被动式，选C。
【考点】考查虚拟语气2. --- My sister is very upset today.--- It is your fault. You ________________ the bad news to her yesterday.A．should tell B．should have toldC．shouldn’t tell D．shouldn’t have told【答案】D【解析】句意：—我的妹妹今天很难过。
—那是你的错。
昨天你不应该告诉她那个不幸的消息。
根据句意可知，不该告诉的消息，却告诉她了。
故用虚拟语气。
选D。
【考点】考查虚拟语气。
3. The officer commanded that the supplies of food and clothes ______ to the flooded area. A．should send B．be sent C．were sent D．would send【答案】B【解析】考查虚拟语气：句意：官员要求食品和衣服供应被送往洪水地区。
主句的谓语是command，从句的谓语用虚拟语气，should do，should可以省略，还有the supplies of foodand clothes和send是被动关系，选B。
【考点】考查虚拟语气4. --- Did they attend the opening ceremony?---They _, but they were late and quit it.A．would B．would have C．didn't D．will have to【答案】B【解析】句意：--他们参加开幕式吗？--他们本想参加，但是他们迟到了，就放弃了。
情态动词与虚拟语气详解(附练习和解析)
情态动词与虚拟语气考点1情态动词的基本用法1.My book，The House of Hades，is missing.Who have taken it?A.needB.mustC.shouldD.could答案 D第二句句意为：可能是谁把它拿走了呢？could可表示说话者主观猜测的“可能”，此时用于否定句和疑问句中，符合题意。
need需要；must一定，肯定，表猜测时通常只用于肯定句；should多指预期的事，常译为“按道理说应该”。
2.—They are said to have been familiar with each other.—But they .They were introduced only hours ago.A.may not have beenB.couldn’t have beenC.mustn’t have beenD.needn’t have been答案 B句意为：——据说他们互相之间已经非常熟悉了。
——但是不可能啊。
他们几小时前才被介绍认识的。
根据句意可知这是对过去情况的否定推测，应用couldn’t have done表示“过去不可能做了某事”。
3.Life is unpredictable；even the poorest become the richest.A.shallB.mustC.needD.might答案 D句意为：生活是难以预料的，甚至是最穷的人都有可能变成最富的人。
might表示比较小的可能性，常用于肯定句和否定句中，符合题意，故选D项。
shall表示将来时态，或命令、允诺、威胁等强烈语气；must一定；need需要，均不合题意。
4.Samuel，the tallest boy in our class，easily reach the books on the top shelf.A.mustB.shouldC.canD.need答案 C句意为：我们班最高的男孩塞缪尔能(can)轻松地够到顶层架子上的书。
高中英语2025届高考语法复习情态动词与虚拟语气知识讲解
高考英语语法复习情态动词与虚拟语气知识讲解一、情态动词（1）表示能力时，can只用于一般现在时，could仅用于一般过去时；而be able to则有更多的时态，如将来时、完成时等。
I haven’t been able to read that report yet.He will be able to skate as well as you.（2）Was/were able to表示能力时，侧重经过努力而成功做到某事；而could仅表示具备能力，不说明是否实施了能力。
He studied hard and was able to pass the exam.（3）用在其他动词，如might,may,would,want,hope等之后表示能力只能用be able to。
He might be able to fix your car.（1）must还可以表示质问或感情色彩，意为“偏要，偏偏”。
Why must it snow on Saturday?（2）should还可以表示惊奇、愤怒、失望等特殊情感，尤其用在以why,who,how等开头的疑问句中或某些感叹句中。
why should you be so late today?（1）must作“必须”讲的一般疑问句，其肯定回答用must，否定回答用needn’t或don’t have to。
-Must I pay now?-Yes, you must./No, you needn’t.（2）need还可以作实义动词，有人称和数的变化，后跟带to的不定式作宾语。
She needed to go out for a walk.（1）两者在表示过去的习惯动作或行为时常可通用。
When we were children, we would/used to go skating every winter.（2）Used to与would都不能与表示具体频率、次数的词及特定的时间状语或具体的一段时间连用。
高中-虚拟语气——情态动词+have-done用法、练习和答案
情态动词+have done用法及练习1.must have done 表示对过去或已经发生的行为或状态进行确有把握的推测，意为“肯定做了某事”；只能用在陈述句的肯定句中。
It must have rained last night, for the road is wet.The lights were out. They must have been asleep.2.can’t/couldn’t have done sth.表示对过去或已经发生的行为或状态进行确有把的推意为“不可能做了某事”；只能用在陈述句的否定句中。
He was with me last night. He can’t/ couldn’t have gone to the theatre.I saw Mr. Wang just now. He couldn’t have gone to Beijing.Can/Could …have done sth?表示对过去或已经发生的行为或状态的怀疑.意为“可能已经…吗？”。
用在疑问句中。
He didn’t attend his sister’s birthd ay party. Can/Could he have forgotten it?3.could have done sth.用于陈述句的肯定句中时是虚拟语气，表示没有实现的可能性，意为“本来可以做，可能已经做”。
有一种对过去为付诸实施的事情的惋惜。
用于肯定句中You could have done better, but you were too careless.3.may/might（not）have done sth表示对过去或已经发生的行为或状态进行推测意为“可能(没有)做了某事；只能用在陈述句的肯定和否定句中。
It’s too late. I think he may have gone to bed. He might not have finished the work.5.Should/ought to have done sth表示“本应该做…”而实际上没做Should/ought not to have done sth. 表示“本不应该做”而实际上做了You should have come to the meeting earlier. You ought to have done this exercise .You shouldn’t have told her the truth. He ought not to have treated his parents like that.6.needn’t have done sth.表示做了“本来不必做的事didn’t need to do 表示“没有必要做而实际上也没有做的事“You needn’t have taken a taxi here, for it was very ne ar to my house.I didn’t need to clean the windows. My brother did it.7.had better have done sth.用于事后的建议，含轻微的责备的口吻，意为“当时最好做了某事“，其否定形式had better not have done sth 表达相反的含义。
高中情态动词和虚拟语气讲解与练习附答案
高中情态动词和虚拟语气讲解与练习附答案高中英语情态动词和虚拟语气情态动词: 记住下面三个方面的用法，可以快速地掌握情态动词。
在遇到情态动词的题的时候，一定要先判断出题目考察的是下面 3 个的哪个方面。
1. 常规（所有）， 2. 判断/推测（5 个+1 个）, 3. 用于虚拟语气的情态动词（5个） 1. 常规:所有的情态动词都有常规的形式，大多12个。
Can: 表示“能力”，表示“请求或允许”。
Could : 用法同上，语气较can 轻。
Must : “必须/一定，应当” ; “偏要” 。
May : 可能/ 可以，表示“征求对方意见或允许”，或“祝愿”Might : 用法同上，语气较may轻。
Should : 表示“应该，惊讶，委婉/客气”。
Ought to: 用法同上，语气较should 重。
Will : “愿，要，会” 表示“意愿，征求意见或提出请求，或执意/决心。
Would : 用法同上，语气较will 轻。
Shall : 征求对方意见;警告/承诺（用于法律或规定中）;应该/必须（语气比should 重）need/dare: 两个“半”情态动词，在肯定句中只能用need/dare + to do在否定/ 疑问句中可用need/dare + to do 或need/dare + do 2. 推测/ 判断: 在高中英语中能用作推测或判断的情态动词大多是can > could （语气由重到轻，用于否定货疑问句中）must > may > might （语气由重到轻，用于肯定句中）should 可用于各种（肯定，否定，疑问）句式中，只能用should + do 的形式对“现在”的事的判断的用法:can/could must/may/might + do/be+doing的事的判断的用法:can/could must/may/might + have done 对“过去”当然其他的情态动词在特殊的情况下也可以用于推测/ 判断，但不常用所以不必记忆。
高考英语语法情态动词和虚拟语气讲解练习含答案
情态动词的基本用法1．shall(1)用在第一、三人称的疑问句中，表示征求对方的意见。
►Shall Tom go there with me tomorrow?明天汤姆可以和我一起去那里吗？(2)用于第二、三人称陈述句中，表示说话人的命令、警告、威胁、许诺、决心等，意为“必须”。
►The school rules state that no child shall be allowed out of the school unless accompanied by an adult.学校制度规定，除非有成人陪同，任何孩子不准离开学校。
2．should(1)表示责任、义务、劝告、建议，意为“(按道理)应该”。
►You should listen to your doctor's advice.你应该听医生的建议。
(2)表示出乎意料的语气，意为“竟然，居然”。
►I am surprised that you should speak in such a way.我很惊讶你居然用那种口气说话。
3．must(1)表示“必须，应该”，语气强烈。
强调主观看法，只有现在时形式，否定式是must not(mustn't)，表示“禁止”。
must开头的问句，其否定回答要用needn't或don't have to来表达。
►—Must I hand in the paper today?——我今天必须交作业吗？—Yes, you must.——是的，你必须交。
—No, you needn't/don't have to.——不，你不需要。
(2)表示推测，意为“一定”，用于肯定句。
►At 29 Russell must be one of the youngest ever international referees.29岁的拉塞尔想必是迄今为止最年轻的国际裁判之一。
高一英语虚拟语气与情态动词试题答案及解析
高一英语虚拟语气与情态动词试题答案及解析1. Henry would rather that his girlfriend _________ in the same department as he does. A．worked B．works C．had worked D．would work【答案】A【解析】考察虚拟语气。
动词短语would rather后面的宾语从句使用虚拟语气，如果叙述现在的事实，使用过去时；如果叙述过去事实，使用过去完成时。
根据后面的he does，说明本句是与现在事实相反，个礼一般过去时。
句意：他宁愿他的女朋友和他在同一个部门工作。
故A正确。
【考点】考察虚拟语气点评：动词短语would rather后面的宾语从句使用虚拟语气，如果叙述现在的事实，使用过去时；如果叙述过去事实，使用过去完成时。
2. Bob's doctor suggests _____ for a few days .A．that he is resting B．that he has to restC．him to rest D．that he rest【答案】D【解析】考查虚拟语气：主句的谓语是suggest“建议”的时候，宾语从句用虚拟语气，形式是：主语+（should） do，句意：医生建议他休息几天，用rest省略了should。
选D。
【考点】考查虚拟语气点评：英语中有4——四个表示“要求”的词，require, ask ,tell, demand；3——三个表示“建议”的词，suggest, recommend, advice；2——两个表示“命令”的词，order,command ； 1——一个表示“坚持”的词，insist。
他们后面接 should+动词原形的虚拟语气。
Should可以省略。
3. --- I did not see your elder brother at the lecture yesterday.---You ______him, since he went to see Chinese Zodiac---Jackie Chan’s 100th movie. A．mustn’t have seen B．couldn’t have seenC．shouldn’t have seen D．needn’t have seen【答案】B【解析】句意：--昨天在报告会上我没有看见你的哥哥。
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二轮专题：情态动词和虚拟语气
情态动词：记住下面三个方面的用法，可以快速地掌握情态动词。
1.常规（所有），
2.判断/推测(5个+1个),
3.用于虚拟语气的情态动词(5个) 1.常规：所有的情态动词都有常规的形式，大多12个。
Can: 表示“能力”，表示“请求或允许”。
Could : 用法同上，语气较can轻。
Must : “必须/一定，应当”；“偏要”。
May : 可能/可以，表示“征求对方意见或允许”，或“祝愿”
Might : 用法同上，语气较may轻。
Should : 表示“应该，惊讶，委婉/客气”。
Ought to: 用法同上，语气较should重。
Will : “愿，要，会” 表示“意愿，征求意见或提出请求，或执意/决心。
Would : 用法同上，语气较will轻。
Shall : 征求对方意见；警告/承诺（用于法律或规定中）；
应该/必须（语气比should重）
need/dare：两个“半”情态动词，在肯定句中只能用need/dare + to do
在否定/疑问句中可用need/dare + to do 或need/dare + do
2.推测/判断：在高中英语中能用作推测或判断的情态动词大多是:
can > could （语气由重到轻，用于否定货疑问句中）
must > may > might （语气由重到轻，用于肯定句中）
should 可用于各种（肯定，否定，疑问）句式中，只能用should + do的形式对“现在”的事的判断的用法：can/could must/may/might + do/be+doing
对“过去”的事的判断的用法：can/could must/may/might + have done
当然其他的情态动词在特殊的情况下也可以用于推测/判断，但不常用所以不必记忆。
3.可以用于虚拟语气的情态动词有以下5个：
Should(应该), would（将,愿，要，会）could（能）, might（可能,可以）
ought to（应该，语气比should强）。
八、虚拟语气：当事情不会发生或发生的可能性很小时，要用虚拟语气。
虚拟的事情可能发生在“现在”，“过去”或“将来”。
一定要先辨别出虚拟的情况发生在“什么时候”，记住下面的表格和后面的几个特殊单词你就会用虚拟语气了。
是否使用情态动词取决于句义，如果需要用情态动词的词
义
时就用should, could, would, might,
ought to
中
的某一个。
在
下面的12
个及物动词后的宾语从句中要用虚拟语气： 三个“建议”： advise, suggest, propose 三个“要求”： ask, require/request, demand 两个“命令”： order, command 一个“希望”： wish 一个“渴望”： desire 一个“宁愿”： would rather 一个“坚持”： insist
注意：这12及物动词所衍生出的名词或形容词所引导的同位语从句、表语从句
或主语从句中也要用虚拟语气。
下面的几个句式中也要用虚拟语气：
It is r equested/suggested/proposed/…+that 从句（从句中要用虚拟语气）
It is important/necessary/natural/strange/ a pity + that 从句（从句中要用虚拟语气） It is ( high/about)time + that 从句，从句中的动词要用were/did 的虚拟形式。
If only + 从句，从句中也要用虚拟语气。
不用情态动词 用情态动词 虚拟的情况发生在“现在” be --- were do ---- did 5个情态动词 + do
虚拟的情况发生在“将来”
be --- were
do ---- did were to do should(译为“将”不作情态动词) + do
5个情态动词 + do
虚拟的情况发生在“过去” had + done/been 5个情态动词 + have done
情态动词和虚拟语气
1. I often see lights in that empty house. Do you think I ______ report it to the police?
2. It is suggested that a doctor __________________（send）for immediately.
3. When he was there, he ______ go to that coffee shop at the corner after work every day.
4. There is no light on; they ______ be at home.
5. ---- Don’t press the button, John.
---- What if I _______(do)
6. Their basketball team has lots of excellent players, so if there is no unexpected thing to happen, their team ______ win the championship.
7. Jenny should ________________(keep)her word. I wonder why she changed her mind.
8. My mother stared at me as if she _________________(see)me before.
A. didn’t see
B. hasn’t seen
C. hadn’t seen
D. doesn’t see
9. It’s high time that he settled down in the city and ______ (start)a new life.
10. How I wish I _____________(begin)to learn Japanese when I was ten.
11. But for your timely help, the boy might _________________(lose) his life.
12.Secondly, if I ________(be)，I would take a walk in the evening with my friends.
13.The old lady insisted that the young man had stolen her wallet and that he (send) to the police station.
14.I couldn't(enjoy) myself more—it was a perfect day.
15. 7.Since nobody gave him any help,he have done the research on his own.。