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1、虚虚拟语拟语气知气知识识清清单单虚拟语气在条件从句中的用法条件句有两类，一一类类是真是真实实条件句，一条件句，一类类是虚是虚拟拟条件句条件句。如果假设的情况是有可能发生的，就是真实条件何。在这种真实条件句中的谓语用陈述语气。如: If it doesnt rain tomorrow, we will go to the park.如果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的，则是虚拟条件句。如: If he had seen you yesterday, he would have asked you about it. 如果他昨天见到你，他会问你这件事的。(事实上他昨天没见到你
2、，因此也未能问你这件事。)1、在含有虚拟条件句的复合句中，主句和从句的谓语都要用虚拟语气。虚拟条件从句和主句的动词形式列表如下:主从句时态虚拟条件句主句例句与现在事实相反的假设If I had time, I would attend the meeting.If I were you, I should seize the chance to go abroad.与过去事实相反的假设If you had taken my advice, you would not have failed in the exams.与将来事实相反的似设If you came tomorrow, we woul
3、d have the meeting.If it were to rain tomorrow, the sports meeting would be put off.If he should not come tomorrow, we should put off the meeting .2、错综时间条件句：有时条件从句中的动作和主句中的动作发生的时间不一致（表示错综时间的虚拟语气），这时动词的形式要根据它所表示的时间加以调整。If . 如果你当初听了医生的话，身体现在就好了。(从句动作指过去，主句动作指现在)3、省略连词 if（倒装）。在书面语中，如果虚拟条件从句中有 were，had
4、或 should，可以把 if 省略，把这几个词放到主语之前，构成主谓倒装。(If he should come), tell him to ring me up.(If I were you), I would not do it.4、含蓄条件句：句中没有明显的虚拟条件句，而是利用某他手段或方式来暗示存在虚拟条件。其虚拟的结构形式通过主句来表现。常用来表示含蓄虚拟条件的方式有：（1）介词或介词短语（代替状语从句）：but for（要不是（要不是），），without（假若没（假若没有有），），with（假若有（假若有）With you help，I could have finished t
5、he work ahead of time. 如果有你的帮助的话，我本可以提前完成这项工作。Without air and water，there would be no living things on the earth. 如果没有空气和水，地球上就不会存在生物。But for the rain，we should have had a pleasant journey. 如果不是因为下雨，旅途会很愉快。What would you do with a million dollars? 如果有了一百万美元，你会做什么？（2）用 or，otherwise(否则)，等类似转折词He telep
6、honed to inform me of your birthday, or I would have known nothing about it.I was ill that day. Otherwise，I would have taken part in the sports meeting.（3）根据上下文语境来表示某种假设情况Five minutes earlier and you could have met her at the station. 早来五分钟的话，你就能在车站见到他了。You could have done better，but you didnt try y
7、ou best.5、省去条件从句或主句：表示虚拟语气的主句或从句有时可以省略，但其含义仍可以推知。（1）省去条件从句。如: You could have washed your clothes yourself. 你本可以自已洗衣服的。省去了“If you had wanted to“)(事实是:你自己没洗衣服，因为你不想洗。)（2）省去主句(常用以表示愿望)。如:If my grandmother were with me! 如果我的祖母与我在一起多好啊如果我的祖母与我在一起多好啊!(事事实实是是:祖母祖母已不在世。已不在世。)；If only she had not left! 如果她没走
8、就好了如果她没走就好了!(事事实实是是:她已她已经经走了。走了。)虚虚拟语拟语气的其他用法气的其他用法l、虚拟语气在主语从句中的用法：在“It is important (strange，natural，necessary)that“这类句型里，that 所引导的主语从句中的谓语动词常用 “should 十动词原形”结构，表示某事是“重要“、“奇怪“、“自然“、“必要“等意义。如: It is important that every member (should) inform himself of these rules. 重要的是每个成员知道这些规则。2、在suggest，demand，
9、order，propose，insist，command，request，desire, recommend 等动词后的宾语从句中，谓语动词用“should + 动词原形”，表示建议、要求、命令等。如: I demand that he (should) answer me immediately.注意注意:当 suggest 表示暗示,表明时,不用虚拟语气,用陈述语气.如:The smile on her face suggested that she was satisfied with our work.当当 insist 表示表示“坚坚持持认为认为，坚坚持持说说”之意之意时时, 不用虚
10、不用虚拟语拟语气气,用用陈陈述述语语气气. 表示表示“坚坚持要求，持要求，坚坚持主持主张张”用虚用虚拟语拟语气气。如:The man insisted that he （从没偷钱。）我们可以用“一二三四”法巧记这些动词：“一、二、三、四一、二、三、四”法，即一个法，即一个坚坚持（持（insist），），两个命令（两个命令（order，command），三个建），三个建议议（suggest，propose，advise）, 四个要求四个要求（demand，require, request ,ask）。）。3、advice, idea, order, plan, demand, proposal,
11、 suggestion, request 等名词之后的表语从句和同位语从句中.如:My suggestion is that we (今晚上开个会议。今晚上开个会议。)4、wish 的用法与现在事实相反, 用 were 或动词的一般过去式;与过去事实相反, 用 had+过去分词;表示将来没有把握或不太可能实现的愿望,用 would/could/might+动词原形,后的从句不能用should.如:I wish she （在这里。）. I wish you （明天和我们一块走。） I wish she （听从了我的建议。）5、用在 would rather,had rather 等后的宾从中谓语
12、动词应用过去时或过去完成时。如：I would rather you were not here. Id rather you had been present.6、在带有 even if/ even though 引导的让步状语从句的主从复合句中，主句和从句都用虚拟语气，动词形式与含有非真实条件句的虚拟语气相同。如:Even if he had been ill, he would have gone to his office. 即使生了病，他俩去办公室。7、由 as if 或 as though 引导的状语从句表示比较或方式时。从句谓语形式为动词的过去式(be 用 were)或 “had
13、 十过去分词”。如:He treated me as if I were a stranger. She talked about the film as if she had really seen it.注:如果表示的事情可能会发生，那么方式状语从句中的谓语动词可用陈述语气。8、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。It is time that the children （去睡觉）. It is high time that the Children （去上学）.9、用在 If only 句型
14、中，意思是“要是就好了”。如：Look at the terrible situation I am in! If only I had follwed your advice.only if 表示“只有“ I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。10、用“may + 动词原形”表示“祝愿“、“但愿”，此时 may 须置于句首（多用于正式文体中）。如：May you be happy!祝你快乐！ May good luck be yours.祝你顺利。11、in case，for fear that 引导的状语从句中，表示“唯恐
15、，以免”，谓语动词用should+动词原形表示虚拟语气。She took the raincoat with her in case she should be caught in rain. The student is working hard for fear that he should fail to pass the exam.1. If I _ where he lived， I _ a note to him.A. knew， wouldB. had known， would have sentC. know， would sendD. knew， would have sent2. If they _ earlier than expected， they _ here now.A. had started， would beB. started， might beC. had started， would have beenD. will start， might have been3. I didnt know his telephone number. _ it， I _ then.A. Had I known， would ri
