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1、如果有were, should ，had时，可以省略if。 把 were， should，had移到主语之前形成倒装。.1. If I were you, I would refuse the money.= Were I you ,I would refuse the money2.Had you told me earlier, I could have done something.3. Should anyone call, tell him to call in the afternoon.虚拟语气在各种从句中的应用虚拟语气在各种从句中的应用I. 虚拟语气在条件从句中 1. I _
2、(come)too if I had had time to spare. 2. I didnt see your sister at the meeting. If she _ (come), she would have met my brother. 3. If the hurricane had happened during the daytime,there_ (be)more deaths.should have comehad comewould have been 4.If it _(rain) tomorrow,we _(not go out). 5._(be) I in
3、good health, I _ (go) with you tomorrow. rained/should rain/were to rainshould not go outWerewould go省略ifII Wish后面的宾语从句现在时 did/were过去时 had done将来时 would/ could/ might doI wish I were cleverer than TomI wish I had sent the old man to hospital in timeI wish I could be with you next week.He is not a pi
4、lot, but he wishes he_ (be).I wish I _(meet)him yesterday.I wish it _(be) fine tomorrow. were had metwould beIII在order, suggest, insist, ask, demand, advise，require, request, command, propose等动词后的宾语从句中，谓语用（should） do 表示愿望建议命令请求等。(order, requirement要求, command命令, proposal建议,suggestion) 1. He made the
5、 suggestion that they_(carry on)their conver-sation in French.2. He ordered the work _ (start) at once.My demand is that you _ (get up)at six.(should) carry on(should ) be started(should) get upIVIt is(was)important(necessary,natural,strange,etc).that sb/sth（should） do在主语从句中. It is strange that he _
6、(make) such a mistake. Thats unexpected.(should) make V. 在其他句型中1. He speaks as if he _(be) an Englishman.2. They talked as if they _(be) good friends for years. were had beenEven if he _(be) here, he couldnt solve the problem.(让步状语从句)Without air, there _(be) no living things. (含蓄条件句)But for your hel
7、p, I _ (not, do) it. (含蓄条件句)要不是4. If only I _(take) his advice, but I didnt.要是。多好 werewould becouldnt have done had taken5. I was very busy yesterday, otherwise I _(come) to the meeting.6. Look at the clock! Its(high) time we _(go) home.7.Id rather you _(stay) at home all day today. Would rather （th
8、at）sb didwould have come went/should go stayedVI.情态动词完成式1.should (not) have done sth. 本应该/不应该做过(责备) You shouldnt have given him a hand, because he will bite that hand that feeds him.2.would have done sth. 本来会.(但实际没做过) I would have invited you to dinner, but I was too busy.情态动词与完成式3.could have done s
9、th. 本能够做过.(但实际没做过.) She could have been admitted into the Tsinghua University, but she didnt work hard enough.4.neednt have done sth. 本不必做过.(但实际做过.) You neednt have come so early. It is only 5:30.1. If he had not lost his money, he _ the piano last week. A. would buy B. had bought C. bought D. could
10、 have bought2. If we were to be 200 years old, we _ everything. A. will change B. can change C. could change D. changed3. If you _ that film last night, you would not be so sleepy now. A. didnt see B. havent seen C. wouldnt seen D. hadnt seen4. You are late. If you _ a little minutes earlier, you _
11、him. A. came, would meet B. had come, would have met C. came, would have met D. were to come, would meet5. But for the storm, we _ a pleasant journey. A. should have B. have had C. would have D. should have had 6. _ to do the work, I should do it some other day. A. If were I B. I were C. Were I D. W
12、as I7. Without the computer, the problem _ in such a short time. A. couldnt be solved B. wouldnt have solved C. couldnt have been solved 8. Without electricity, human life _ quite different today. A. will be B. were to be C. would be D. is 9. “You are very selfish. Its high time you _ you are not the most important person in the world,” Edgar said to his boss angrily. A. have realized B. realized C. realize D. should realize10. I wish I _ longer this morning, but I had to get up and come to class. A. could have slept B. slept C. might have slept D. have slept