S12英语4教师虚拟用于if从句中王颖分析.docx

1、S12英语4教师虚拟用于if从句中王颖分析Overview教案撰稿人老师完稿时间2016.06审核人长宁校区英语备课组审核时间2016.06课程进度第次课课程标题虚拟用于条件从句学生对象：高二升高三虚拟用于条件从句ReviewI. Make the best choice. BCBAD CBDCD ADCAB A1.The environment in major cities in our country has been improved _ some extent in the last decade.A. by B. to C. in D. with2. The constructio

2、n of the Chinese railway systems has been developing at great speed, _ a ticket for home-going remains difficult to get during the Spring Festival. A. however B. and C. but D. so 3. Please put these laptops on the shelf by _. Dont mix them with others. A. ourselves B. themselves C. itself D. oneself

3、4. My friend has returned from the UK. She _ at Oxford for four years, during which we communicated with each other on the Internet. A. studied B. has studied C. had studied D. has been studying5. We _ estimate the spirit of the Shanghai Expo too much, which is sure to play an important role in our

4、daily life.A. may not B. should not C. must not D. cannot6. _ in the front row at the ceremony, our distinguished guests are from home and abroad. A. Seating B. Being seated C. Seated D. To seat7. It was reported that Lin Dan _ gold medals in a variety of badminton competitions in the world. A. has

5、been awarded B. had been awarded C. was being awarded D. would be awarded8. The folks were delighted at the message of their relatives _ that mine explosion.A. survived B. to survive C. were surviving D. having survived9. I received a call from the police at midnight yesterday. _ that he had been ba

6、dly injured in a car accident. A. Then did I learn B. Only then I learned C. Only then did I learn D. Only then learned I 10. Some local officials are not yet aware of the necessity of the environmental protection _ theyve been educated time and again. A. on condition that B. so that C. as though D.

7、 even though11. When learning he was admitted to a key college, _. A. he burst into tears B. tears came to his eyes C. he can hardly keep back his tears D. and his parents were wild with joy12. How many of us _, say, a meeting that is irrelevant to us would be interested in the discussion?A. attende

8、d B. attend C. to attend D. attending13. Dont you think citizens are increasingly concerned about _ next season?A. will the estate prices keep rising B. if the estate prices will keep rising C. whether the estate prices will keep rising D. how much will the estate prices keep rising 14. The China Pa

9、vilion, _, The Crown of the East, has a unique roof, is one of the most important style features in traditional Chinese architecture.A. whose structure B. which structure C. structure of which D. of which structure15. The prediction from Maya worries inhabitants _ December 21, 2012 would be the end

10、of the world. A. if B. that C. whether D. which16. Will the plan _ the libraries nationally be carried out in the coming year? It all depends, I suppose. A. to promote B. promote C. promoting D. that promotePresentation 虚拟用于if从句中 语气（mood）是一种动词形式，用以表示说话者的意图或态度。英语动词有陈述语气、祈使语气和虚拟语气。1. 陈述语气叙述事实或者可能发生的事情

11、时，人们所使用的语气就是陈述语气。I want to travel in space like Yang Liwei. 我想象杨力伟那样去太空旅行。2. 祈使语气人们用来表示命令、要求、请求、邀请、劝告或建议时所使用的语气就是祈使语气。Open your books at P. 126. 翻开书126页。3. 虚拟语气表示所说的话不是事实，而只是一种愿望、猜测、假设、建议，并且这种愿望、建议等实现的可能性很少或根本不能实现时，所使用的语气就是虚拟语气。 If there were no air and water, we should not be able to live on the ea

12、rth. 虚拟语气在if条件状语从句中的用法If he had enough money, he would buy a new car. If you had come five minutes earlier, you would have met him.If he should try it again, he would succeed in being employed. 假设类型条件从句谓语动词形式主语谓语动词形式与现在事实相反动词的过去式(be一律用were)should/ would /could/ might+动词原形与过去事实相反had + 过去分词should/ wou

13、ld/could/might + have+过去分词与将来事实相反1.should+动词原形2.动词过去式3.were to+动词原形should/ would/ could/ might +动词原形注：If的省略当从句中有were, had, should, would等放在主语前可构成疑问句的词时，可省略if，用倒装形式。If she had more time, she would finish the work on time. If he had arrived there earlier, he would have seen him. If he should have time

14、 tomorrow, he would come to visit you. If I were in school again, I would work harder. Had she more time, she would finish the work on time. Had he arrived there earlier, he would have seen him. Should he have time tomorrow, he would come to visit you. Were I in school again, I would work harder. 错综

15、时间条件句当条件状语从句表示的行为和主句表示的行为做发生的时间不一致时，动词的形式要根据它所表示的时间来调整。If the weather had been much nicer, the crops would be growing better now. (从句与过去相反，主句与现在相反)If you hadnt told me about it, I would go tomorrow.(从句与过去相反，主句与将来相反)If he should come this afternoon, ask him to wait.(从句与将来相反，主句用祈使句)If he were careful

16、enough, he would not have made so many mistakes. (从句与现在相反，主句与过去相反)If条件句主句表过去（用过去完成时）表现在（用过去将来时）表现在（用过去时）表过去（用将来完成时） 虚拟条件句中可含有陈述语气的从句If it were not for that the fact that you are ill, I would ask you to do this right now. (虚拟现在式，陈述语气用现在时)If I had been informed that he was not in, I would not have cal

17、led on him. (虚拟过去式，陈述语气用过去时) 含蓄条件句有时，虚拟可以不出现if条件句，而是利用介词短语、分词短语、不定式、或连词通过上下文表现出来。这时，须根据句子的含义来判定是用虚拟现在式还是虚拟过去式。-Without, with, under 引导的介词短语With your help, I could have finished the task so quickly. (介词短语表过去，句子用虚拟过去式)Without water, the fish would be dead. (介词短语表现在，句子用虚拟现在式)In that case we could have

18、succeeded.(介词短语表过去，句子用虚拟过去式)-分词短语Born in harder times, you would have achieved nothing. (分词短语表过去，句子用虚拟过去式)The same task, done in this way, would be finished sooner. (介词短语表现在，句子用虚拟现在式)-不定式短语To hear her speak French, one would take him for a Frenchman.(不定式的一般式指现在，句子用虚拟现在式)To have worked more carefully

19、, you would have done the task better.(不定式的完成式指过去，句子用虚拟过去式)-连词but, but that, or 或otherwise主句(虚拟语气)+ but + 从句(陈述语气) but that (若不是) 主句(虚拟语气)+ or (否则) + 从句(虚拟语气) Otherwise(否则) It would be a failure not to pass the exam, but I really dont have time to prepare. I was not at home; otherwise I would have l

20、et you in. I should have finished the cleaning but that I answered a phone for half an hour. He swims every day, or he would be fatter. 虚拟语气用在简单句中，表示祝愿，命令。May you have a good time. God bless you! 句子有时可以省略虚拟条件句，因此其时态与虚拟条件句中的主句谓语的时态一致。An old man could do that. (用虚拟现在式，指现在)A well-behaved child would no

21、t have said such a thing. (用虚拟过去式，指过去) 用于固定表达用于短语： So be it 那就这样吧；be that as it may 无论如何；if need be 如有必要用于特殊结构：Be +主语+ever so 形容词，意为“无论怎样”Be a man ever so learned, he ought not to be proud. Be the rain ever so heavy, I will go there this evening. Be he rich or poor, shell marry him all the same.Focu

22、sed PracticeI. Make the best choice. 1-5 CBABA6-10 DACAB 11-15 CCCAD16-20 CDACA1. We demanded that we _ of any change in the plan. A. informed B. would be informed C. be informed D. had been informed2. Its necessary that he _ a recognized qualification. A. has B. have C. had D. having3. Its high tim

23、e we _ our attention to this problem. A. turned B. turn C. had turned D. would turn4. If only you _ him what I said! Everything would have been all right. A. didnt told B. hadnt told C. would not tell D. would have not told5. He must have had an accident, or he_ here then.A. would have been B. had b

24、een C. should have been D. could be6. Much labour would have been saved if the electronic computers_ before.A. had invented B. were invented C. should have been invented D. had been invented7. _ cease advertising, prices would be significantly reduced.A. Were they to B. Could they C. If they D. Woul

25、d they8. Five minutes earlier, and we _ the last bus.A. had caught B. should have caught C. could have caught D. caught9. You _ the clothes! We have a washerwoman to do that sort of thing.A. shouldnt have washed B. mustnt have washedC. can not have washed D. neednt have washed10. Jean doesnt want to

26、 work right away because she thinks that if she _ a job she probably wouldnt be able to see her friends very often.A. has to get B. were to get C. had got D. could have got11. The mad man was put in the soft-padded cell lest he _ himself.A. injure B. had injured C. injured D. would injure12. It is p

27、olitely requested by the hotel management that radios _ after 11 oclock at night.A. were not played B. not to play C. not be played D. did not play13. You dont have to be in such a hurry. I would rather you _ on business first.A. would go B. will go C. went D. have gone14. It is important that enoug

28、h money _ to fund the project.A. be collected B. must be collected C. was collected D. can be collected15. If only the committee _ the regulations and put them into effect as soon as possible.A. approve B. will approve C. can approve D. would approve16. I dont think it advisable that Tom _ to the jo

29、b since he has no experience.A. is assigned B. will be assigned C. be assigned D. has been assigned17. You _ her in her office last Friday; shes been out of town for two weeks.A. neednt have seen B. must have seen C. might have seen D. cant have seen18. We didnt know his telephone number, otherwise we _ him.A. would have telephoned B. must have telep