2017高考复习虚拟语气专题复习

高考英语中虚拟语气的用法—难点突破对虚拟语气的测试主要涉及以下方面：1）主语、表语、同位语、宾语从句中虚拟语气的用法2）wish , would rather虚拟语气结构的用法3）if 条件句中虚拟语气的用法，应特别注意省略if 的倒装结构是考试的重点4）if only 结构中虚拟语气的用法5）but for , or, otherwise 等含蓄条件句的用法6）It’s time (that) 等结构中虚拟语气的用法（一）虚拟语气在虚拟条件句中的运用条件从句有两类，一是真实条件句，另一是虚拟条件句。

如果假设的情况可能发生，是真实条件句，这种情况下谓语用陈述语气。

如：If time permits, we’ll go fishing together.如果时间允许，我们就一起去钓鱼。

如果假设的情况是不存在的或不大可能发生的，则是虚拟条件句。

如：If you had come yesterday, you would have met that famous professor.如果你昨天来，你就会见到那位著名的教授了。

（隐含的事实是：你昨天没来，也没见到那位著名教授）。

在含有虚拟条件句的复合句中，主从句的谓语都要用虚拟语气，现将其形式列表如下：1．表示与现在事实相反的假设和结果。

If I were you, I should(would ,could, might)tell him the truth.要是我是你，我就会告诉他真相了。

（事实上我不是你）If she had time, she would(could, might)help me.如果她有时间，她就会帮我了。

（事实上她没有时间）2. 表示与过去事实相反的假设和结果。

If you had taken my advice, you wouldn’t(couldn’t) have failed in the exam.如果你听了我的建议，你就不会考试不及格。

含山县职教中心2016-2017学年度第二学期教师公开示范课教案公开课教师：周静公开课时间：2017年2月23日上午第二节课公开课地点：高三计算机2班Subjunctive Mood虚拟语气专题复习一．教学目标：虚拟语气是高考的重点，且难度较大。

本次课程通过对虚拟语气知识点的复习讲解，总结概括，让学生知道虚拟语气是用来表示人的主观的愿望和假想，达到学生对知识点的熟练运用，在脑海中形成具有条理性的知识框架的目的。

二．教材分析：虚拟语气是高考英语重点和难点，掌握好虚拟语气的重要性对每个参加高考的学生不言而喻。

这次课程是高三第一轮复习时对虚拟语气的再次讲解和梳理，全部的知识都经过了高度的总结合概括，均是高考考点。

三．学生特征分析：辅导的学生是高三年级，刻苦努力，理解能力较强，有一定的基础。

基本知识掌握一般，且很多重要的知识点已经遗忘四．教学重点难点： 1、真实条件句和非真实条件句的用法。

2、虚拟语气用在主语从句，表语从句，同位语从句，定语从句中的用法。

3、情态动词+ have + done的用法。

五．教学过程一．定义：虚拟语气是一种动词形式，表示说话人的一种愿望，假设，怀疑，猜测，建议等含义。

虚拟语气所表示的含义不是客观存在的事实。

二．虚拟语气在非真实条件句中1.概念真实条件句：表示现实或可能变为现实的条件。

非真实条件句：表示非现实的，或不可能，或不大可能变为现实的条件。

e.g. ①I will go fishing if it doesn’t rain tomorrow.②If I were a bird, I could fly in the sky.e.g. ①If you had got up earlier,you could have caught the train.②If he came tomorrow,we could ask him.练习：①If you ＿＿＿＿(take) my advice,you ＿＿＿＿＿＿(not fail) in the exams last term.②If it ＿＿＿＿(rain) tomorrow,the sports meeting ＿＿＿＿＿＿(put off).③If everyone ＿＿＿＿(know)first aid,many lives ＿＿＿＿＿＿(save).3.重点：混合虚拟语气和含蓄虚拟语气以及虚拟语气的倒装1)有些句子主句谓语和从句谓语表示的动作在时间上并不一致，这类句子称为“错综时间条件句”。

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2024年【2024浙江1月卷】However, though it’s nice to get a few cents off a pack of sausages, it would help even more if they could sometimes ____41____ (offer) in smaller packs. Even the biggest sausage fan doesn’t want to eat them every day.2022-2021年1．【2021年天津卷第一次】It used to be that you ___drive for miles here without seeing another person, but now there are houses and people everywhere.A．need B．should C．could D．must2.【2021年天津卷第二次】---I honestly don't think I'm going to be admitted.---Wel1, you never know! You________ a better impression than you think.A. may have madeB. should have madeC. couldnt have madeD. needn't have made2020年1.【2020年新课标Ⅰ】I like eating frying tomatoes with eggs, and I thought it must to be easy to cook. 2．【2020·天津】Jim says we ______ stay in his house as long as we leave it clean and tidy .A．must B．can C．need D．should3．【2020·天津】You ____________ have scolded him for his poor performance. After all, he had done his best. A．must B．should C．mustn’t D．shouldn't2019年1.【2019年江苏卷】What a pity! You missed the sightseeing, or we _________a good time together.A. hadB. will haveC. would have hadD. had had2018年1.【2018年北京卷】In today’s information age, the loss of data _________ cause serious problems for a company.A. needB. shouldC. canD. must2. 【2018年北京卷】They might have found a better hotel if they _________ a few more kilometers.A. droveB. would driveC. were to driveD. had driven3.【2018年江苏卷】It’s strange that he_______ have taken the books without the owner’s permission.A. wouldB. shouldC. couldD. might4. 【2018年江苏卷】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 had5.【2018年天津卷】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 left6. 【2018年天津卷】If we ___________the flight yesterday, we would be enjoying our holiday on the beachA. had caughtB. caughtC. have caughtD. would catch2017年1. 【2017年北京卷】Samuel, the tallest boy in our class, ___________ easily reach the books on the top shelf.A. mustB. shouldC. canD. need2. 【2017年北京卷】If the new safety system ___________ to use, the accident would never have happened.A. had been putB. were putC. should be putD. would be put3.【2017年江苏卷】____________ not for the support of the teachers, the student could not overcome her difficulty.A. It wereB. Were itC. It wasD. Was it4.【2017年天津卷】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’t5. 【2017年天津卷】—Do you have Betty’s phone number?—Yes. Otherwise, I ___________ able to reach her yesterday.A. hadn’t beenB. wouldn’t have beenC. weren’tD. wouldn’t be2016年1.【2016年新课标Ⅰ卷】We can chose between staying at home and take a trip.2.【2016年新课标Ⅰ卷】. Some classmates suggest we can go to places of interest nearby.3.【2016年浙江卷】Had the governments and scientists not worked together, AIDS-related deaths _________ since their highest in 2005.A. had not fallenB. would not fallC. did not fallD. would not have fallen4. 【2016年浙江卷】George _________ too far. His coffee is still warm.A. must have goneB. might have goneC. can’t have goneD. needn’t have gone5. 【2016年天津卷】It was really annoying; I _____________ get access to the data bank you had recommended.A. wouldn’tB. couldn’tC. shouldn’tD. needn’t6. 【2016年北京卷】I love the weekend, because I ________ get up early on Saturdays and Sundays.A. needn’tB. mustn’tC. wouldn’tD. shouldn’t7. 【2016年北京卷】Why didn’t you tell me about your trouble last week? If you ________ me, I could have helped.A. toldB. had toldC. were to tellD. would tell8. 【2016年江苏卷】If it _________ for his invitation the other day, I should not be here now.A. had not beenB. should not beC. were not to beD. should not have been2015年1.【2015年新课标Ⅰ卷】We must found ways to protect your environment.2.【2015年湖南卷】Remember, however, that you should usually consult different types of sources. That is,3.【2015年四川卷】As I tell you last time, I made three new friend here. ...If you are me, would you talk to him?4. 【2015年北京卷】—Can’t you stay a little longer?—It’s getting late. I really go now. My daughter is home alone.A. mayB. canC. mustD. dare5.【2015年福建卷】—Sorry, Mum! I failed the job interview again.—Oh, it’s too bad. You ________ have made full preparations.A. mustB. canC. wouldD. should6. 【2015年陕西卷】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. shouldB. needC. shallD. may7.【2015年陕西卷】Ellen is a fantastic dancer. I wish I as well as her.A. danceB. will danceC. had dancedD. danced8.【2015年四川卷】You _____be careful with the camera. It costs!A .must B. may C. can D.will9. 【2015年天津卷】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’t10. 【2015年浙江卷】It was so noisy that we hear ourselves speak.A. couldn'tB. shouldn'tC. mustn’t D needn’t11. 【2015年重庆卷】You ____ be Carol. You haven’t changed a bit after all these years.A. mustB. canC. willD. shall。

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.。

虚拟语气高考重要知识点汇总一、虚拟语气在非真实条件句中注意：1、当条件句表示的行为和主句表示的行为所发生的时间不一致时，被称作“错综时间条件句”，动词的形式要根据它所表示的时间作出相应的调整。

If you had followed my advice just now, you would be better now.If you had studied hard before, you would be a college student now.经典考题：1、It has been raining for a day, but even though it hadn’t rained , we ____ there bytomorrow.A. can’t getB. won’t getC. hadn’t gotD. wouldn’t get2、If only he _____ quietly as the doctor instrusted, he would not suffer so much now.A. liesB. layC. had lainD. should lie3、If you had worked hard, you ______ so anxious now．（2010宣武一模）A．are not B．would not have been C．will not be D．would not be4、We went for an outing yesterday. If the weather hadn’t been good, we ____ out.(2010昌平二模)A. wouldn’t goB. would goC. wouldn’t have goneD. would have gone5、If you the right map , we wouldn’t have got lost.（2010宣武二模）A．have bought B．bought C．had bought D．would buy2、if 省略句If 引导的虚拟条件句中的谓语动词含有had, should, were 时，可将if省略，而将had, should, were 置于句首，采用倒装结构。

专题 14 情态动词（二）关键词：推测，虚拟，肯定否定，语气难度系数：✱✱✱✱推荐指数：✱✱✱✱✱【基础回顾】考点归纳：情态动词表示推测的用法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。

(can/could/ may/might/must be)表示对现在或将来的情况的推测，此时动词通常为系动词。

2. 情态动词+动词现在进行时。

(can/could/ may/might/must be doing)表示对现在或将来正在进行的情况进行推测。

3. 情态动词+动词完成时。

(can/could/ may/might/must have done)表示对过去情况的推测。

1) may(might) have + done sth, can (could) have + done sth 表示过去，推测过去时间里可能发生的事情。

2)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。

3) should have done sth过去竟然做了某事。

4) can't/couldn’t have done sth过去不可能做了某事。

5) can/could sb have done sth.? 过去可能做了某事吗？4. 情态动词+动词的现在完成进行时。

(can/could/ may/might/must have been doing) 表示对过去正在发生事情的推测。

5. 推测的否定形式，疑问形式用can't, couldn't表示。

注意：could, might表示推测时不表示时态，其推测的程度不如 can, may。

基础必读：情态动词在虚拟语气中的用法情态动词用于虚拟语气中表示责备的感情色彩，用法如下:1. should/ ought to have done 表示“本来应该做某事而实际上未做”2.shouldn’t /ought not to have done 则表示“本不应该做某事而实际上做了”。

高考英语虚拟语气练习题30题1.If I were you, I ______ study harder.A.willB.wouldC.canD.must答案：B。

本题考查对现在情况的虚拟语气。

if 引导的条件句用一般过去时（be 动词用were），主句用“would/should/could/might + 动词原形”。

A 选项will 用于一般将来时，不符合虚拟语气用法；C 选项can 表示能力，不符合虚拟语气用法；D 选项must 表示必须，也不符合虚拟语气用法。

2.If he ______ more time, he could finish the project.A.hasB.hadC.haveD.would have答案：B。

对现在情况虚拟，if 条件句用一般过去时，have 的过去式是had。

A 选项has 用于一般现在时；C 选项have 用于一般现在时复数主语；D 选项would have 用于对过去情况的虚拟条件句的主句。

3.She would be happy if she ______ a better job.A.findsB.foundC.will findD.would find答案：B。

对现在情况虚拟，if 条件句用一般过去时，find 的过去式是found。

A 选项finds 用于一般现在时；C 选项will find 用于一般将来时；D 选项would find 用于对过去情况的虚拟条件句的主句。

4.If they ______ enough money, they could buy a new car.A.haveB.hadC.will haveD.would have答案：B。

对现在情况虚拟，if 条件句用一般过去时，have 的过去式是had。

A 选项have 用于一般现在时；C 选项will have 用于一般将来时；D 选项would have 用于对过去情况的虚拟条件句的主句。