虚拟语气定义：表示说话人所说的不是事实，而是一种假设、愿望、怀疑或推测。
应用：错综时间条件句：A.非真实性条件句：if省略句：把were，had，should提到句首，变为倒装句式。
（Attention：否定形式）含蓄条件句：表示隐含条件，结构与if同。
（without, but for, or/otherwise）a. wish后接宾语从句，表示不可能实现的愿望。
宾语从句 b. 用于表示建议、命令、要求等动词后宾语从句。
B.名词性从句： c. would rather主语从句：It is/was+形容词/过去分词+ that从句。
表语从句&同位语从句：在suggestion, proposal, order, plan, idea,request, advice等名词后的表语从句和同位语从句中要用虚拟语气，C.as if/as though引导的从句：常与seem/look/appear等动词连用，表示“看起来似乎……”；以及if only表示“要是……该多好呀”。
（结构同wish）D.定语从句和状语从句：定语从句：It is (high) time (that)…句型中。
目的状语从句：in case, for fear that, in order that, so that等引导目的状语从句。
考点一 虚拟语气在非真实性条件句的运用要点归纳：真实条件句：假设的情况是有可能发生，谓语要用陈述语气。
条件句非真实条件句，即虚拟条件句。
假设的情况是过去或现在都不存在的，或将来不大可能发生。
e. g. If it doesn’t rain tomorrow, we will go to the park.If he had seen you yesterday, he would have asked you about it.虚拟语气结构列表如下：e.g. If he were here, everything would be all right.从句（条件句） 主句（结果句） 与现在事实相反的假设If +主语+动词过去式（were ） 主语+ should/would/could/might +动词原形 与过去事实相反的假设 If +主语+ had +过去分词主语+ should/would/could/might + have +过去分词与将来事实相反的假设 1. If +主语+动词过去式 2. If +主语+ were to +动词原形 3. If +主语+ should +动词原形主语+ should/would/could/might +动词原形If her mother had taken the doctor’s advice, she would/might have got well earlier.If it were to rain tomorrow, the match would be canceled.1、错综时间条件句有时条件从句的动作和主句动作发生的时间不一致，这时需根据意思采用表示不同时间的动词形式来进行调整。
If she had taken the doctor’s advice, she might still be alive.If I were you, I would have accepted their terms.2、if省略句，采用局部倒装语序。
把had /should/were等动词（不包括行为动词）移到从句的句首。
If I were at school again, I would study harder.Were I at school again, I would study harder.If it should rain tomorrow, we would not go climbing.Should it rain tomorrow, we would not go climbing.If you had come earlier, you would have caught the bus.Had you come earlier, you would have caught the bus.3、含蓄条件句：有时候假设的情况并不用条件从句表示出来，而是通过其他手段来表示。
（without/but for/otherwise/or/but）Without air (If there were no air), there would be no living things.But for your help (If it hadn’t been for your help), I couldn’t have done it.【小试牛刀】1.We __________ (be) back in the hotel now if you didn’t lose the map.2. If he __________ (catch) the morning train, he would not have been late for the meeting.3. If we __________ (book) a table earlier, we wouldn’t be standing here in a queue.考点二 虚拟语气在名词性从句中的应用要点归纳： a. wish + (that) + ✿宾语从句 b. 用于表示建议、命令、要求等动词后宾语从句，结构为“(should)+动词原形”c. would rather + sb + e.g.a. I wish I were better -looking.I wish I had met the film star just now.I wish I would be a soldier.b. The young man insisted that I (should) go with his fellows.The doctor advised that he change his job.c. ——Shall I open the window?——I’d rather you didn’t.【小试牛刀】1. How I wish every family ______ a large house with a beautiful garden!A. hasB. hadC. will haveD. had had2. Teachers recommend parents ______ their children under 12 to ride bicycles to school for safety. 过去式 （现在/将来）had + 过去分词 （过去）过去式(were) （现在）had + 过去分词 （过去）一坚持：insist 二命令：order / command 四建议：advise / suggest / recommendA. not allowB. do not allowC. mustn’t allowD. couldn’t allow3. George is going to talk about the geography of his country, but I’d rather he ______ more on its culture.A. focusB. focusedC. would focusD. had focused✿主语从句：It is/was+形容词/过去分词+ that从句，从句谓语动词为“(should)+动词原形”。
desired/suggested/proposed/recommended/important/necessary/strange/natural/essential/a pity等e.g. It is natural that she (should) do so.Attention: 以上句式也可用陈述句式。
e.g. It’s a pity that you can’t dance.【小试牛刀】— Don’t you think it necessary that he ______ to Miami but to New York?— I agree, but the problem is ______ he has refused to.A. will not be sent; thatB. not be sent; thatC. should not be sent; whatD. should not send; what✿表语从句&同位语从句：在suggestion, proposal, order, plan, idea, request, advice等名词后的表语从句和同位语从句中要用虚拟语气，结构：“(should)+动词原形”。
e.g. My idea is that we (should) think it over before accepting it.考点三虚拟语气在as if/as though引导的从句中的应用要点归纳：as if (as though)引导的方式状语从句可用陈述语气，也可用虚拟语气。
常与seem/look/appear等动词连用，表示“看起来似乎……”；以及if only意为“要是……该多好呀”，表示与事实相反的愿望。
（结构同wish）e.g. He talks as if he knew where she was.He talks about Rome as if he had been there before.It looks as if it might snow.e.g. If only the player had had more courage!If only Daisy would go with me!【小试牛刀】1.——It was John who broke the window.——Why are you talking to me as if I __________ (do) it?2.He speaks Chinese so fluently as if he __________ (be) a Chinese.3.Looking round the town, he left as though he __________ (be) away for ages.4.Look at the trouble I am in! If only I ______ your advice.A. followedB. would followC. had followedD. should follow考点四虚拟语气在定语从句和状语从句中的应用要点归纳：定语从句：It is (high) time (that)…句型中，谓语动词用一般过去时，或用“should + 动词原形”，意为“（现在）该……”，用来表示建议。