1、三年高考英语试题分类汇编专题06 情态动词和虚拟语气2017年高考题【2017北京卷】21. Samuel, the tallest boy in our class, _ easily reach the books on the top shelf.A. must B. should C. can D. need【答案】C考点：考查情态动词【名师点睛】常用的情态动词有can，may，must，need, should等1. can 的用法： 表示能力 “能，会” eg: He can speak a little Japanese.他会说一点日语。 表示请求或许可 “可以” eg: Can
2、 I help you? 要我帮忙吗? 表示猜测 “可能” eg: Where can she go now? 她可能到哪里去了呢? 2.may 的用法：表示请求或允许 “可以”“准许” eg: May I go home，please?请问我可以回家吗? 表示可能性 “ 可能”、也许” eg: I think it may rain this afternoon. 我想今天下午可能下雨。 注：might为may的过去式，但也可以代替may，语气较为婉转客气或更加不肯定。 eg: He might not come today.今天他也许不来了。(语气不肯定) You might also g
3、et a headache when you work too hard，当你工作太努力时，你也可能患头痛3. must的用法： 表示义务、必要或命令 “必须、应该” eg: You must come early tomorrow你明天得早来。 表示推测时“肯定，一定” eg: They must be at home.The light is on 他们肯定在家,灯亮着呢. must not 禁止，不许 eg: You must not tell lies. 你不许撒谎。 注意： must开头的疑问句，其否定回答通常用 dont have to 或neednt 。而不用mustnt eg:
4、 -Must I finish my homework first? 我必须先完成作业吗？ -No, you dont have to/ neednt. 不，你不必。 can 和 must在 表推测时，can一般否定句中，而must 常用于肯定句中。 eg: It can not be Li Lei 那个人不可能是李磊 It must be Li Lei 那个人肯定是李磊。4. need 的用法： 情态动词 “需要, 有必要”一般用于否定句或疑问句中。 eg: You neednt come here this afternoon.你今天下午不必来。 行为动词 “需要, 有必要” 可以用于各种
5、句式中。eg: You dont need to go now. 你不必现在就走。 I need to have a rest. 我需要休息一下 Do we need to finish all the work today? 我们今天需要完成所有的工作吗？need的用法的助记口诀：实义动词表“需要”，后接名、代、不定式。 need后接动名词，主动形式表被动。情态动词表“需要”，没有人称 数之变。 其后直接加动原，多用疑问与否定。【2017北京卷】34. If the new safety system _ to use, the accident would never have happe
6、ned. A. had been put B. were put C. should be put D. would be put【答案】A考点：考查虚拟语气。【名师点睛】英语中的三种语气，语气是动词的一种形式，用来说明我们对自己的话所采取的态度。1、陈述语气（疑问，否定，肯定，感叹）2、祈使语气（命令，要求，建议，警告）3、虚拟语气：不可能发生的事，愿望，建议，与事实相反的假设等.1、虚拟语气在条件中的具体用法真实条件句If you work hard,youll surely pass the exam.虚拟条件句（假设情况不存在，实现机会很小）If I were a bird, I co
7、uld fly freely in the sky.if从句的谓语动词主句谓语动词1.与现在事实相反动词过去式（be一律用were）would/could/might/should+动词原形2.与过去事实相反had done would/could/might/should+have done3.与将来事实可能相反a.动词过去式（be一律用were）b.should+动词原形（不能用would）c.were to+动词原形would/could/might/should+动词原形1.与现在事实相反if从句：动词过去式（be-were）主句：would/could/might/should+动词
8、原形If we had time, we would go with you.If I were you, I shouldnt do that.If it werent raining, we wouldnt stay.2.与过去事实相反if从句：had done主句：would/could/might/should+have doneIf the teacher hadnt helped us, we couldnt have succeeded.I could have done it better if I had been more careful.If he hadnt been
9、ill, he might have come.3.与将来事实可能相反if从句：a.动词过去式（be一律用were） b.should+动词原形（不能用would） c.were to+动词原形主句：would/could/might/should+动词原形If he came tomorrow, I would tell him everything.If it should rain tomorrow, I would stay at home and watch TV.If it were to snow tomorrow, they would not go out.Should he
10、 come tomorrow, please give the book to him.4.错综时间条件句(有时时间会省略）学科5.含蓄条件句有时虚拟条件不用if条件从句，而用介词或介词短语来表示。They would not be able to live without him.（如果没有）He would have failed but for his teachers timely advice.（要不是）=if it had not been forIf only you had worked with greater care!(要是.就好了）You would have done
11、 the same thing in her position.With a little more care you could have avoid the traffic accident.6.虚拟结合条件句在虚拟语气中，假设的情况有时间可以通过上下文或其他方式表现出来，并且虚拟的情况和真实的情况同时存在。I was ill that day. Otherwise, I would have taken part in the singing competition.（实-虚）=I was ill that day. If I hadnt been ill that day, I wou
12、ld have taken part in the singing competition.He would have bought the piano, but he didnt have enough money.（虚-实）=He would have bought the piano if he had had enough money, but in fact he didnt have enough money. 7.省略if倒装条件句在虚拟语气中，if从句假设的情况中如果有助动词had, should和were，那么可省略if，把had, should和were放在句首构成倒装，简
13、称省略if倒装条件句。If he had finished the work yesterday, he would have gone to the concert with you. =Had he finished the work yesterday, he would have gone to the concert with you.If I were you, I wouldnt do that. =were I you, I wouldnt do that.If I should meet him, I would tell him about it. =Should I me
14、et him, I would tell him about it.【2017江苏卷】22. _ not for the support of the teachers, the student could not overcome her difficulty.A. It were B. Were it C. It was D. Was it【答案】B【名师点睛】在虚拟语气中，be动词只能用were；虚拟条件句省去连词if时，从句主谓部分倒装：Were/Had/Should+主语+谓语动词.e.g. Were I Tom, I would refuse. 如果我是汤姆，我会拒绝。I will
15、 go, should it be necessary. 假若有必要，我会去的。Had it not been for the bad weather we would have arrived in time. 若不是天气坏，我们就准时到达了。若条件从句为否定句，否定词not应置于主语之后，而不能与were, should, had 等缩略成Werent, Shouldnt, Hadnt置于句首。考点：考查虚拟语气和倒装【2017天津卷】2. My room is a mess, but I _clean it before I go out tonight. I can do it in
16、the morning.A. darent B. shouldnt C. neednt D. mustnt【答案】C试题分析： 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。考点：考查情态动词。【名师点睛】情态动词主要考查句意和说话人的语气的强弱，这几个情态动词的否定形式意思各不相同，确定各自的含义，弄清它们的区别再结合上下文语境就不难理解了。 darent通常表示“不敢”，shouldnt强调的是没有义务，必要性；neednt表示“不需要”，mustnt 表示不许，语气比较强烈，它们之间有明显不同。【20
17、17天津卷】15. Do you have Bettys phone number?Yes. Otherwise, I _able to reach her yesterday.A. hadnt been B. wouldnt have been C. werent D. wouldnt be【答案】B【名师点睛】if的虚拟语气非常重要，首先要熟悉基本用法：1、表示与现在事实相反的情况，从句：If主语+过去时(be动词用were)；主句：主语+should/would/could/might+do：2、表示与过去事实相反的情况，从句：If主语+had+done；主句：主语+should/ wo
18、uld/ could/ might+have done3、表示对将来情况的主观推测，从句：if+主语+were to doif+主语+should+do if+主语+did（动词过去式）/were ；主句：主语+should /would/ could /might+do，另外要注意从句也可以省略if，把had，were，should提前。这句话的虚拟语气是根据标志词otherwise和句意推断出主句是对过去的虚拟。2016年高考题1.【2016北京】31. I love the weekend, because I _ get up early on Saturdays and Sunday
19、s.A. neednt B. mustnt C. wouldnt D. shouldnt【答案】A试题分析：题目考查情态动词。句意：我喜欢周末，因为周六和周日我不需要早起。A. neednt不需要；B. mustnt禁止；C. wouldnt不愿；D. shouldnt不应该。根据句意可知，周六、周日不用早起，故选A。考点：考查情态动词 【名师点睛】 常用的情态动词有can，may，must，need,should, had better.1. can 的用法： 表示能力 “能，会” eg: He can speak a little Japanese.他会说一点日语。 表示请求或许可 “可以
20、” eg: Can I help you? 要我帮忙吗? 表示猜测 “可能” eg: Where can she go now? 她可能到哪里去了呢? 2.may 的用法：表示请求或允许 “可以”“准许” eg: May I go home，please?请问我可以回家吗? 表示可能性 “ 可能”、也许” eg: I think it may rain this afternoon. 我想今天下午可能下雨。 注：might为may的过去式，但也可以代替may，语气较为婉转客气或更加不肯定。 eg: He might not come today.今天他也许不来了。(语气不肯定) You mig
21、ht also get a headache when you work too hard，当你工作太努力时，你也可能患头痛3. must的用法： 表示义务、必要或命令 “必须、应该” eg: You must come early tomorrow你明天得早来。 表示推测时“肯定，一定” eg: They must be at home.The light is on 他们肯定在家,灯亮着呢. must not 禁止，不许 eg: You must not tell lies. 你不许撒谎。 注意： must开头的疑问句，其否定回答通常用 dont have to 或neednt 。而不用m
22、ustnt eg: -Must I finish my homework first? 我必须先完成作业吗？ -No, you dont have to/ neednt. 不，你不必。 can 和 must在 表推测时，can一般否定句中，而must 常用于肯定句中。 eg: It can not be Li Lei 那个人不可能是李磊 It must be Li Lei 那个人肯定是李磊。4. need 的用法： 情态动词 “需要, 有必要”一般用于否定句或疑问句中。 eg: You neednt come here this afternoon.你今天下午不必来。 行为动词 “需要, 有必
23、要” 可以用于各种句式中。eg: You dont need to go now. 你不必现在就走。 I need to have a rest. 我需要休息一下 Do we need to finish all the work today? 我们今天需要完成所有的工作吗？need的用法的助记口诀：实义动词表“需要”，后接名、代、不定式。 need后接动名词，主动形式表被动。情态动词表“需要”，没有人称 数之变。 其后直接加动原，多用疑问与否定。2.【2016北京】34. Why didnt you tell me about your trouble last week? If you _
24、 me, I could have helped.A. told B. had told C. were to tell D. would tell【答案】B考点：考查虚拟语气【名师点睛】英语中的三种语气，语气是动词的一种形式，用来说明我们对自己的话所采取的态度。4、陈述语气（疑问，否定，肯定，感叹）5、祈使语气（命令，要求，建议，警告）6、虚拟语气：不可能发生的事，愿望，建议，与事实相反的假设等.2、虚拟语气在条件中的具体用法真实条件句If you work hard,youll surely pass the exam.虚拟条件句（假设情况不存在，实现机会很小）If I were a bi
25、rd, I could fly freely in the sky.If it snowed tomorrow, we would stay at the home.if从句的谓语动词主句谓语动词1.与现在事实相反动词过去式（be一律用were）would/could/might/should+动词原形2.与过去事实相反had done would/could/might/should+have done3.与将来事实可能相反a.动词过去式（be一律用were）b.should+动词原形（不能用would）c.were to+动词原形would/could/might/should+动词原形2
26、.与现在事实相反if从句：动词过去式（be-were）主句：would/could/might/should+动词原形If we had time, we would go with you.If I were you, I shouldnt do that.If it werent raining, we wouldnt stay.3.与过去事实相反if从句：had done主句：would/could/might/should+have doneIf the teacher hadnt helped us, we couldnt have succeeded.I could have do
27、ne it better if I had been more careful.If he hadnt been ill, he might have come.3.与将来事实可能相反if从句：a.动词过去式（be一律用were） b.should+动词原形（不能用would） c.were to+动词原形主句：would/could/might/should+动词原形If he came tomorrow, I would tell him everything.If it should rain tomorrow, I would stay at home and watch TV.If
28、it were to snow tomorrow, they would not go out.Should he come tomorrow, please give the book to him.5.错综时间条件句在虚拟语气中，有时条件从句动作发生的时间和主句动作发生的时间是不一致的，称为错综时间条件句。这种句子的形式往往要根据句子的时间相调整，分别处理。If you had spoken to him yesterday, you would know what to do now.If you had followed the doctors advice then, you wou
29、ld be all right now.If you had watered them more, the crops would be growing still better now.(有时时间会省略） 6.含蓄条件句有时虚拟条件不用if条件从句，而用介词或介词短语来表示。They would not be able to live without him.（如果没有）He would have failed but for his teachers timely advice.（要不是）=if it had not been forIf only you had worked with
30、greater care!(要是.就好了）You would have done the same thing in her position.With a little more care you could have avoid the traffic accident.7.虚拟结合条件句在虚拟语气中，假设的情况有时间可以通过上下文或其他方式表现出来，并且虚拟的情况和真实的情况同时存在。I was ill that day. Otherwise, I would have taken part in the singing competition.（实-虚）=I was ill that day. If I hadnt been ill that day, I would have taken part in the singing competition.He would have bought the piano, but he didnt have enough money.（虚-实）=He would have bought the piano if he had had enough mon
