1、精诚凝聚 =_= 成就梦想 高中英语虚拟语气知识点1）虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。虚拟语气在条件句中应用比较多。 2）条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。 16.1 真实条件句用于陈述语气，假设的情况有可能发生。各种结构参见下表： 句 型 条件从句 主句 一般现在时 shall/will + 动词原形 祈使句 情态动词一般现在时 例如：If he comes, he will bring his violin. 如果他来，会带小提琴来的。 典型例题 T
2、he volleyball match will be put off if it _. A.will rain B. rains C. rained D. is rained 答案B。真实条件句主句为将来时，从句用一般现在时。 注意： 1）在真实条件句中，主句不能用be going to表示将来，该用shall, will. （错） If you leave now, you are never going to regret it. （对） If you leave now, you will never regret it. 2）表示真理时，主句谓语动词不用shall （will） +动
3、词原形，而直接用一般现在时的动词形式。 16.2 非真实条件句 1）虚拟语气可以表示过去，现在和将来的情况，时态的基本特点是时态往后推移。 a. 与现在事实相反的假设 条件从句 主句 一般过去时（be用were） should（would）等 +动词原形 例如：If they were here, they would help you. 如果他们在这儿，会帮助你的。 含义：They are not here, they cant help you. b. 与过去事实相反的假设 条件从句 主句 过去完成时 should（would）等+ have+ 过去分词 例如：If he had come
4、 yesterday, I should / would have told him about it.如果他昨天来的话，我会把这件事告诉他的。 含义：He did not come yesterday, so I did not tell him about it. c. 表示对将来不大可能发生的事情的假想 条件从句 主句 一般过去时 should/would等 + 动词原形 were+ 不定式 should+ 动词原形 例如：If you succeeded, everything would be all right. 如果你将来成功了，一切都会好的。 If you should suc
5、ceed, everything would be all right. If you were to succeed, everything would be all right. 含义：You are not likely to succeed, everything will be what it is now. 16.3 混合条件句 有时，主句与从句的动作发生在不同的时间，主句从句谓语动词的虚拟语气形式因时间不同而不同，这种条件句叫做混合条件句。例如： If you had asked him yesterday, you would know what to do now. 如果你昨
6、天问过他，今天就知道做什么了。 （从句与过去事实相反，主句与现在事实相反。） If it had rained last night（过去）, it would be very cold today （现在）.如果昨晚下过雨，今天就会很冷了。 16.4 虚拟条件句的倒装 虚拟条件句的从句部分含有were, should, 或had时, 可省略if，再把were, should或had 移到从句的句首，实行倒装。例如： Were they here now, they could help us. =If they were here now, they could help us.他们现在在的
7、话，就会帮助我们了。 Had you come earlier, you would have met him. =If you had come earlier, you would have met him.你来得早一点，就碰到他了。 Should it rain, the crops would be saved. =Were it to rain, the crops would be saved.假如下雨，庄稼就有救了。 注意：在虚拟语气的从句中，动词be的过去时态一律用were，不用was，即在从句中be用were代替。例如： If I were you, I would go t
8、o look for him. 如果我是你，就会去找他。 If he were here, everything would be all right. 如果他在这儿，一切都会好的。 典型例题 _ to do the work, I should do it some other day. A. If were I B. I wereC. Were ID. Was I 答案C. 在虚拟条件状语中如果有were, should, had这三个词，通常将if省略，主语提前, 变成 were, should, had +主语的形式。但要注意，在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的
9、缩略形式。如我们可说 Were I not to do, 而不能说 Werent I to do。 16.5 特殊的虚拟语气词should 1）在主语从句中的应用 It is demanded / necessary / a pity + that等结构的主语从句，谓语动词用should 加动词原形，should 可省略。 It is 可用的词有三类 that （should）do suggested, ordered, required, proposed, demanded, requested, insisted等 important, necessary, natural, imper
10、ative, strange等 a pity, a shame, no wonder等 2）在宾语从句中的应用 在表示命令、建议、要求等一类动词后面的从句中，像order, suggest, propose, require, demand, request, insist, command, insist + （should） do等。例如： I suggest that we （should） hold a meeting next week. 我建议下周召开个会议。 He insisted that he （should ） be sent there.他要求被派到那儿去。 注意：如su
11、ggest, insist不表示建议 或坚持要某人做某事时，即它们用于其本意暗示、表明、坚持认为时，宾语从句用陈述语气。 判断改错： （错） You pale face suggests that you（should）be ill. （对） Your pale face suggests that you are ill. （错） I insisted that you（should）be wrong. （对） I insisted that you were wrong. 3）在表语从句，同位语从句中的应用 suggestion, proposal, idea, plan, order,
12、advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。例如： My idea is that we（should）get more people to attend the conference.我的想法是让更多的人来参加会议。 I make a proposal that we（should）hold a meeting next week.我提了个建议，下周我们开个会。 16.6 wish的用法 1）wish后面的从句，表示与事实相反的情况，或表示将来不太可能实现的愿望。其宾语从句的动词形式为： 主句 从句 从句动作先于主句动词动作（be的过去式为 we
13、re） 现在时 过去时 从句动作与主句动作同时发生（had + 过去分词） 过去时 过去完成时 将来不大可能实现的愿望 将来时 would/could +动词原形 例如：I wish I were as tall as you.我希望和你一样高。 He wished he hadnt said that. 他希望他没讲过那样的话。 I wish it would rain tomorrow. 我希望明天下雨就好了。 2）wish to do；wish sb / sth to do。例如： I wish to see the manager. = I want to see the manage
14、r. 我希望见一见经理。 I wish the manager to be informed at once. （= I want the manager to be informed at once.）我希望经理能马上得到消息。 16.7 比较if only与only if only if表示只有；if only则表示如果就好了。If only也可用于陈述语气。例如： I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。 If only the alarm clock had rung.当时闹钟响就好了。 If only he comes
15、 early.但愿他早点回来。 16.8 It is （high） time that It is （high） time that 后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。例如： It is time that the children went to bed. 孩子们该睡觉了。 It is high time that the children should go to bed. 16.9 need 不必做和本不必做 didnt need to do表示过去不必做某事, 事实上也没做。 neednt have done表示过去不必做某事, 但事实上做
16、了。例如： John went to the station with the car to meet Mary, so she didnt need to walk back home. 约翰开车去车站接玛丽，所以她不必步行回家了。 John went to the station with the car to meet Mary, so she neednt have walked back home. 约翰开车去车站接玛丽，所以她本不必步行回家了。 （Mary步行回家了，没有遇上John的车。） 典型例题 There was plenty of time. She _. A. must
17、nt have hurried B. couldnt have hurriedC. must not hurry D. neednt have hurried 答案D。neednt have done. 意为本不必，即已经做了某事，而时实际上不必要。 Mustnt have done 用法不正确，对过去发生的事情进行否定性推断应为couldnt have done, 不可能已经。 must not do 不可以（用于一般现在时）。 16.10 虚拟语气练习 1.Everything _ if Albert hadnt called the fire brigade. a.will be des
18、troyed b. will have been destroyed b.would be destroyed d. would have been destroyed 2.If you hadnt gone with Tom to the party last night,_. a.you would meet John already b. you wont have missed John c.you will have met John d. you would have met John 3.Supposing this ship _ , do you think there wou
19、ld be enough life jackets for all the passengers? a. was sinking b. has sunk c. were to sink d. sunk 4.The insects would devour all our crops and kill our flocks and heads, if _ for the protection we get from insect-eating animals. a. it is not b. it were not c. were it not d. they were not 5.The te
20、acher suggested that each student _ a plan for the vacation. a. made b. make c. makes d. will make 6.Frankly, Id rather you _ anything about it for the time being. a. do b. dont do c. didnt do d. will not do 7.After the way she treated you, if I _ in your place. a. be b. am c. was d. were 8.The idea
21、 is that the nation _ an unmanned spacecraft to explore the planet first. a. sent b. sends c. send d. must send 9.Its high time you _. a. start to work b. would start to work c. started to work d. had started to work 10.“If I hadnt practiced when I was younger,” the musician says,“I _ able to play s
22、o well now.” a. wouldnt be b. wont be c. wouldnt have been d. couldnt have been 11.It is imperative that you _ there in person. a. are b. were c. be d. will be 12.The atomic structure is, _, a miniature solar system. a. as it were b. as if they were c. as it were d. as if are 13.We required that the
23、 machine parts _ cast iron. a. is made of b. be made from c. be made of d. is made by 14.The management urged that the cost of production _. a.to be further reduced b. was further reduced b.be further reduced d. should further reduced 15.The business is risky. But _ we would be rich. a. should we su
24、cceed b. we should succeed c. might we succeed d. would we succeed 16.I wish our teacher _ to give another test. I havent got prepared yet. a. isnt going b. werent going c. will not going d. could have gone 17.I wish I _ to the movies with you last night. a. went b. did go c. could go d. could have
25、gone 18.Id just as soon _ rudely to her. a. that you wont speak b. your not speaking c. you not speak d. you didnt speak 19.If I _ in the twenty-first century, I _ my vacation in a very different way. a. should livewould spend b. will live .should spend c. are living should have spent d. will be liv
26、ingwould have spent 20.It is required that the machine _ as frequently as necessary. a. be oiled b. must be oiled c. is oiled d. will oil 21.His English teacher recommends that he _ a regular degree program. a. begins b. begin c. will begin d. is beginning 22.We prefer that the plan _ before being p
27、ut into execution. a.is fully discussed b. must be fully discussed c.be fully discussed d. will be fully discussed 23.What do you think of his proposal that improvements _ in the old type of vacuum cleaner? a. be made b. will be made c. would be made d. will have to be made 24.The doctors advice is
28、that the patient _ about his real physical condition. a.be not told b. not be told c. will not be told d. must not be told 25._,we could not have finished the work on time. a.If they do not help us b. Was it not for their help c.Should they offer to help us d. But for their help 26.If we had been mo
29、re careful, we _ much better results now. a. got b. had got c. would be getting d. would have got 27.Henry _ a rich man today if he had been more frugal in the past. a. would be b. is c. will be d. was 28.They thought it desirable that an armed guard _ in readiness. a. stands b. stand c. stood d. wo
30、uld stand 29.All science students, _,should have a good foundation in basic sciences. a.whether they are future physicists and chemists b.they are future physicists of chemists c.they should be future physicists of chemists d.be they future physicists or chemists 30.Sally cant have written tome, or
31、_ the letter by now. a. Ill get b. Ill have got c. Id have got d. Id get 31.I should very much like to have gone to the party but I _. a. am not invited b. was not invited c. shall not be invited d. am not being invited 32.There is a general understanding among the members of the Board of Directors
32、that chief attention _ to the undertaking that is expected to bring in highest profit. a. is given b. gives c. should be given d. must be given 33.One of the requirements for a fire is that the material _ to its burning temperature. a. be heated b. is heated c. would be heated d. to heat 34.“Did you
33、 go to see the football match yesterday?” “No. I didnt feel well, but I would have gone if I _.” a.did b. have c. would d. had 35.If we had known that she had planned to arrive today, we _ her at the bus station. a. may have met b. might meet c. may meet d. might have met 36.Were safer in a train th
34、an we would be if we _ any other way. a. traveled b. had traveled c. travel d. have traveled 37.He told me how he had given me shelter and protection without which I _ of hunger and cold. a. would be died b. would have died c. would die d . will have died 38._ today, he would get there by Friday. a.
35、Was he leaving b. If he is leaving c. Were he to leave d. If he leaves 39.Had electronic computers not been invented, many problems of space flight _. a.could be not solved b. could not be solved b.could not have been solved d. could not have solved 40.He is a poorly learnt man. But he acts as thoug
36、h he _. a. is b. were c. should be d. seems like 41.The driver looked over the engine carefully lest it _ on the way. a. goes wrong b. go wrong c. went wrong d. would go wrong 42._ the fog, we should have reached our destination. a. Because of b. In spite of c. In case of d. But for 43.The old man w
37、ent to office on foot, but he _ by bus. a. might have gone b. ought have gone c. could have gone d. should be gone 44.He is working hard for fear that he _ to pass the exam. a. fails b. may fail c. should fail d. would fail 45.She put on her glasses in order that she _. a. can see b. saw c. had seen
38、 d. might see 46.Whatever _ well go ahead. a. had happened b. will happen c. might happen d. may be happened 47.If I _ out of ink, I might have finished writing the paper. a. hadnt run b. shouldnt run c. didnt run d. havent run 48.But for your advice, I _ into trouble. a. would get b. got c. might h
39、ave got d. should get 49._ for the traffic jam, I should have covered fifty miles. a. Had it been b. Had it not been c. It had not been d. It not had been 50.Were it not for the adoption of the open policy, things _ they are today. a. would never be b. could have been c. would never have been d. did
40、nt have 51.If only I _ there. a. have not been b. would not been c. will not be d. had not been 52.Tom would buy that bicycle but he _ no money. a. had b. has c. had had d. has had 53.I didnt go to the party, but I do wish I _ there. a. was b. were c. had been d. went 54.It is time we _ up our resul
41、ts. a. sum b. summed c. will sum d. would sum 55.Dr Bethune worked hard as if he _. a. never had felt tired b. had never felt tired c. never felt tired d . was tired never 56.I enjoyed the movie very much. I wish I _ the book from which it was made. a. have read b. should have read c. am reading d.
42、had read 57.It is strange that such a thing _ in your school. a.will happen b. happens c. should happen d. happened 58.If she could sew,_. a.she make a dress b. she would have made a shirt c.she will make a shirt d. she would had made a coat 59.“Did you notice John was not at work today?” “No. If _
43、working, I would have noticed it.” a.Id be b. I wasnt c. Id been d. werent 60.“Why dont you explain it to her?” “I _ it to her if I thought she would understand.” a.would explain b. will explain c. explain d. would have explained 61.“Your performance was very good.” “I could have done better if I _
44、more time.” a. have had b. had c. had had d. will have had 62.“She wouldnt drink her medicine last night, would she?” “_.” a.No, but I wish she wouldnt b. No, but I wish she had b.Yes, I wish she drank d. yes, I wish she could 63.I think it advisable that he _ for Tokyo soon. a. will leave b. may le
45、ave c. leave d. leaves 64.The committee asked that the matter _ at the next meeting. a. would be discussed b. will be discussed c. be discussed d. may be discussed 65._ to the doctor right away, he might have been alive today. a.If he went b. Were he gone c. should he had gone d. Had he gone 66._ th
46、e work, he would do it some other way. a. Was he going b. If he does c. Were he to do d. If he is doing 67._,I hardly think I would have recognized him. a.Should his name not be mentioned b. Had someone not mentioned his name c.If someone did not mention his name d. If someone had mentioned his name 68.Id just as soon _ to the theatre tonight. a. n
