高中虚拟语气的用法(详细)
发布网友
发布时间：2022-04-23 06:56
共5个回答
热心网友
时间：2022-06-17 03:05
1. 条件句中虚拟语气的形式
从句中提出一种与客观现实不相符或根本不可能存在的条件，主句会产生的一种不可能获得的结果。条件句中的虚拟语气根据不同的时间有三种不同的形式。
时间
从句谓语形式
主句谓语形式
将来
动词过去式(be用were)
should + 动词原形
were to + 动词原形
would / should / might / could + 动词原形
现在
动词过去式(be 用 were)
would / should / might / could + 动词原形
过去
had +动词过去分词
would / should / might / could have + 动词过去分词
2. 条件句中的虚拟语气的举例
(1) 将来时的条件句中的虚拟语气。如：
If he should go to Qing Hua University, he would make full use of his time. 如果他要上清华大学的话，他就会充分利用他的时间了。
If he were to come here, he would tell us about it. 如果他要来的话，他会通知我们一声。
(2) 现在时的条件句中的虚拟语气。如：
If he were free, he would help us. 要是他有空的话，它会帮助我们的。
If he studied at this school, he would know you well. 如果他在这所学校学习的话，它会对你很熟悉。
(3) 过去时的条件句中的虚拟语气。如：
If I had seen the film, I would have told you about it. 我如果看过这场电影，我会把电影内容告诉你了。
If I had got there earlier, I would have met Mr. Li. 如果我早点到那儿，我就会会到了李先生。
3. 运用条件句中的虚拟语气时，须注意的几个问题
(1) 当从句的主语为第三人称单数时，谓语动词若是系动词be时，可用 was 代替 were。但在倒装虚拟结构及 if I were you, as it were 中，只能用 were。如：
Were I ten years younger, I would study abroad. 要是我还年轻十岁的话，我会去国外学习。
If I were you, I would try my best to grasp the chance. 要是我是你的话，我要尽力抓住这次机会。
(2) 有时，虚拟条件句中，主、从句的动作若不是同时发生时，须区别对待。
①从句的动作与过去事实相反，而主句的动作与现在或现在正在发生的事实不符。如：
If I had worked hard at school, I would be an engineer, too. 如果我在学校学习刻苦的话，我现在也会使工程师了
If they had informed us, we would not come here now. 如果他们通知过我们的话，我们现在就不会来这里了。
②从句的动作与现在事实相反，而主句的动作与过去事实不符。如：
If he were free today, we would have sent him to Beijing. 如果他今天有空的话，我们会已经派他去北京了。
If he knew her, he would have greeted her. 要是他认识她的话，他肯定会去问候她了。
③从句的动作与过去发生的情况相反，而主句的动作与现在正在发生的情况相反。如：
If it had not been raining too much, the crops would be growing much better. 如果天不下太多的雨的话，庄家会长得更好。
If he had been working hard, he would be working in the office now. 要是他工作一直努力的话，他现在已进了办公室了。
(3) 当虚拟条件句的谓语动词含有 were, should, had 时，if 可省略，而将 were, should, had等词置于句首。如：
Should he agree to go there, we would send him there. 要是他答应去的话，我们就派他去。
Were she here, she would agree with us. 如果她在这儿的话，她会同意我们的。
Had he learnt about computers, we would have hired him to work here. 如果她懂一些电脑知识的话，我们会已经聘用他来这里工作了(from www.yygrammar.com)。
(4) 有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断。如：
I would have come to see you, but I was too busy. 我本该来看你了，然而我太忙了。
But for his help, we would be working now. 要不是他的帮助，我们还会在工作呢。
Without your instruction, I would not have made such great progress. 要是没有你的指导，我不会取得如此大的进步。
(5) 有时，虚拟条件句中，主、从句可以省略其中的一个，来表示说话人的一种强烈的感情。
①省略从句
He would have finished it. 他本该完成了。
You could have passed this exam. 你应该会通过这次考试了。
②省略主句
If I were at home now. 要是我现在在家里该多好啊。
If only I had got it. 要是我得到它了该多好啊。
二、其他状语从句的虚拟语气
1. 目的状语从句中的虚拟语气
(1) 在 for fear that, in case, lest 引导的目的状语从句中，若用虚拟语气时，从句谓语为： should + 动词原形。并且 should 不能省略
She examined the door again for fear that a thief should come in. 她又把门检查了一遍，以防盗贼的进入。
He started out earlier lest he should be late. 他很早就出发了以防迟到。
(2) 在 so that, in order that 所引导的目的状语从句中，从句中的谓语为：can / may / could / might / will / would / should + 动词原形。如(from www.yygrammar.com)：
He goes closer to the speaker so that he can hear him clearer. 他走近说话的人以便能挺得更清楚。
He read the letter carefully in order that he should not miss a word. 他把信读得很仔细以便不漏掉一个单词。
2. 让步状语从句中的虚拟语气
(1) 在 even if, even though 所引导的让步状语从句中，可用虚拟语气，主句、从句的结构与 if 所引导的条件从句结构相同。如：
Even if he were here himself, he should not know what to do. 即使他亲自来也不知该怎么办。
Nobody could save him even though Hua Tuo should come here. 即使华佗在世也救不了他。
(2) 在whatever, whichever, whenever, whoever, wherever, however, no matter wh-word 等引导的让步状语从句中，从句虚拟语气结构为：
① may +动词原形(指现在或将来)。如：
We will finish it on time no matter what / whatever may happen. 不管发生什么事，我们都要按时完成。
We will find him wherever / no matter where he may be. 无论他在哪里，我们都要找到他。
I will wait for him no matter how late he may come. 不管他来的多么晚，我都会等他。
② may +完成式(指过去) ，主句结构不限。如：
You mustn’t be proud whatever / no matter what great progress you may have made. 不管你取得了多么大的进步，你也不能骄傲(from www.yygrammar.com)。
We must respect him no matter what / whatever mistakes he may have made. 不管他翻过什么错误，我们必须尊敬他。
(3) 在though, although等引导的让步状语从句中，从句虚拟语气结构为 should +动词原形，主句结构不限。如：
Although / Though he should often be late, he is a good student. 尽管他经常迟到，他还是个好学生。
Although / Though he should be secretary, he must obey the rules. 尽管他是*，他也必须遵守规定。
3. 方式状语从句中的虚拟语气
as if, as though 引导的方式状语从句常用虚拟语气。虚拟语气的结构为：
表示所发生的时间
虚拟语气结构
发生在主句动作之前
had + 过去分词
与主句动作同时发生
过去时(be 用were )
发生在主句动作之后
would / could / might / should+原形动词
例如：
They began to talk warmly as if they had known each other for long. 他们开始热烈的谈论起来就好像他们已相互认识很久了。
He coughed twice as if someone should come. 他咳嗽两声就好像有人要来了。
4. 原因状语从句中的虚拟语气
amazed, angry, annoyed, astonished, disappointed, frightened, happy, pleased, proud, sorry, surprised, upset 等后面的状语从句中常用虚拟语气。其虚拟语气的结构为：
① should + 原形动词(指现在或将来)。如：
He was angry that you should call him by name. 他很生气，你竟然对他直呼其名。
I was astonished that he should not answer such an easy question. 我很惊讶他竟答不出如此简单的问题。
② should + 完成式, 指过去。如：
I’m very sorry that you should have failed the exam. 我很遗憾，你这次考试竟然失败了。
I was very surprised that Father should have known what I did yesterday. 我很吃惊，父亲竟指导我昨天所作的事情(from www.yygrammar.com)。
三、宾语从句中的虚拟语气
1．英语中，如：advise, ask, demand, desire, decide, insist(坚决要求) , order, propose, request, suggest(建议) 表示请求、要求、命令或建议等意义的动词所接的宾语从句一般用虚拟语气，其虚拟语气的结构为：(should) + 原形动词。如：
The teacher advised that we should make good use of every minute here. 老师劝我们要好好地利用在这儿的每一分钟。
The Party asked that we should serve the people with our heart and soul. 党要求我们要全心全意地为人民服务。
但是，当insist的意思为：坚决认为，坚持说；suggest的意思为：表明，暗含，暗示等时，宾语从句一般不用虚拟语气。如：
Tom insisted that he hadn’t stolen the watch. 汤姆坚持说他没有偷那块手表。
His smile suggested that he had succeeded in this exam. 他的微笑表明他在考试中成功了。
2. believe, expect, suspect, think, imagine 等动词的否定句或疑问句中的宾语从句常用虚拟语气。其虚拟语气的结构为：should + 原形动词。如：
Can you believe that he should kill a tiger? 你能相信他竟杀死了一只老虎？
Can you imagine that he should take the first place in the long jump contest? 你能想象得到他在跳远比赛中竟获得了第一名？
3. 英语中，wish 之后的宾语从句，表示一种没有实现或根本不可能实现的愿望，常用虚拟语气。其虚拟语气的结构为(from www.yygrammar.com)：
表示所发生的时间
虚拟语气结构
发生在主句动作之前
(1)had + 过去分词；
(2)would / could / might / should + have + 过去分词
与主句动作同时发生
过去时(be 用were )
发生在主句动作之后
would / could / might / should + 原形动词
例如：
I wish I learnt English well. 我希望我已学好了英语。
I wish I had been there with them last week. 我希望上周跟他们一起在那儿。
He wishes we could go and play games with him. 他希望我们能去跟他做游戏。
4. 英语中，would rather, had rather, would sooner等之后的宾语从句常表示与客观事实不相符的一种愿望，故使用虚拟语气。其虚拟语气的结构为：
表示所发生的时间
虚拟语气结构
过去
had + 过去分词；
现在
过去时(be 用were )
将来
过去时(be 用were )
例如：
I’d rather you had seen the film yesterday. 我倒想你昨天看过了这场电影。
I’d rather you were here now. 我倒想你现在在这儿。
We’d rather you went here tomorrow. 我么倒想你明天去那儿。
四、主语从句中的虚拟语气
在表达惊异、惋惜、遗憾、理应如此等意义的主语从句中常使用虚拟语气，其虚拟语其的结构为： should + 动词原形，主句中的谓语动词形式不限。
句型：
(1) It is admirable / dreadful / extraordinary / odd / remarkable / sad / advisable / annoying / disappointing / surprising / upsetting / frightening / better / best / curious / desirable / important / strange / peculiar / proper / necessary / natural …that…
(2) It is a pity / a shame / no wonder…. that…
(3) It is suggested / requested / desired / proposed /…. that …
(4) It worries me that…
如：
It is important that we should do well in our lessons first. 我们先把功课学好很重要。
It is strange that he should not come. 很奇怪，他竟没有来。
It is a pity that we should not meet last night. 真遗憾我们昨天晚上没有见过面。
It worries me that we should be blamed for that. 我们竟要受责备真让人烦恼。
五、表语从句及同位语从句中虚拟语气
英语中，表示请求、要求、命令、建议等名词advice, desire, decision, idea, instruction, order, plan, proposal, recommendation, request, requirement, suggestion, wish充当句子的主语而后面接表语从句或它们后面接同位语时，表语从表面上看几屗及同位语从句都须用虚拟语气。其虚拟语气的结构为：(should) + 动词原形。如：
We followed his advice that we should ask our teacher for help. 我们接受了他的建议：我们应该请求老师的帮助(from www.yygrammar.com)。
He told us his idea that he should go to university. 他告诉了我们他的想法：他想上大学。
His suggestion is that we should do our work more carefully. 他的建议就是我们的工作要更细心些。
Their plan is that they should build a new factory in their hometown. 他们的计划就是在家乡建一座新工厂。
六、定语从句中的虚拟语气
英语中，表示：“早该做某事了”时，定语从句中的谓语动词须用虚拟语气，其虚拟语气的结构为：It is (high / about) time that + 主语+ 动词的过去式/ should + 动词原形。如：
It is time that I went to pick up my daughter at school. 我该去学校接我的女儿了。
It is high time you should go to work. 你早该上班了。
七、简单句中的虚拟语气
1. 说话时，为了表示客气、谦虚、委婉而有礼貌，言语常使用虚拟语气。其虚拟语气的结构形式常为：would / could / might / should + 原形动词。如：
Would you mind my shutting the door? 我把门关起来你介意吗？
You should always learn this lesson by heart. 你要把这个教训牢记于心。
I should agree with you. 我应该同意你的观点。
2. 表示“祝愿”时，常用“may + 主语 + 动词原形 + 其他”。如：
May you have a good journey! 祝你一路顺风。
May your youth last for ever! 祝你青春永驻。
3. 表示强烈的“愿望”、“祝愿”时，常用动词原形。如：
Long live the Communist Party of China. 中|国|共|产|党|万|岁。
God bless us. 上帝保佑。
4. 习惯表达中常用的虚拟语气。
(1) 提出请求或邀请。如：
Would you like to have a talk with us this evening? 今天晚上来跟我们聊天好吗？
Could I use your bike now? 我可以用一下你的单车吗？
(2) 陈述自己的观点或看法。如：
I should glad to meet you. 见到你我会很高兴。
I would try my best to help you. 我会尽力帮助你。
(3) 提出劝告或建议。如：
You’d better ask your father first. 你最好先问一问你的父亲。
You should make a full investigation of it first. 你应该先全面调查一番。
(4) 提出问题。如：
Do you think he could get here on time? 你认为他能按时来吗？
Do you expect he would tell us the truth? 你期望他会告诉我们*吗？
(5) 表示对过去情况的责备时，常用虚拟语气。其虚拟语气的结构为：“情态动词 + have + 过去分词”。如：
You should have got here earlier. 你应该早就到这里了。
You should have returned it to him. 你应该把他还给他了。
热心网友
时间：2022-06-17 03:06
第一部分：语气的定义和种类
1 语气(mood)
语气是动词的一种形式，表示说话人对某一行为或事情的看法和态度。
2 语气的种类
⑴、陈述语气：表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。如：
①There are two sides to every question.每个问题都有两个方面。
②Were you busy all day yesterday?昨天一整天你都很忙吗？
③How good a teacher she is!她是多好的一位老师啊！
⑵、祈使语气：表示说话人对对方的请求或命令。如：
①Never be late again!再也不要迟到了。
②Don’t forget to turn off the light.别忘了关灯。
⑶、虚拟语气：表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如：
①If I were a bird, I could fly in the air.如果我是一只小鸟，我就能在空中飞行。
②I wish I could pass the examination.我希望我能通过考试。
③May you succeed!祝您成功！
虚拟语气在语法里算得上是个难点。让我们就从最简单的开始吧。
第二部分：简单句中的虚拟语气
一、情态动词的过去式用于现在时态时，表示说话人的谦虚、客气、有礼貌、或委婉的语气，常用于日常会话中。如：
⑴.Would you be kind enough to show me the way to the post office?请你告诉我去邮局的路好吗？
⑵.It would be better for you not to stay up too late.你最好别熬夜到很晚。
二、表祝愿。
1、常用“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）。
⑴、May good luck be yours!祝你好运！
⑵、May you be happy!祝你快乐！
⑶、May you do even better!祝你取得更大成就！
⑷、May you have a good time. 祝愿你玩的痛快。
⑸、May the friendship between us last long. 祝愿我们的友情天长地久。
⑹、May you be happy. (注意那个be ) 祝你幸福。
2、用动词原形。例如：
(1).Long live the people! 人民万岁！
(2).“God bless you,”said the priest.牧师说：“愿上帝保佑你！”
(3).Have a good journey! 祝愿你旅途愉快！
三、表示强烈愿望。（该类型虚拟语气谓语仅用动词原形，第三人称单数也不加“s”）
(1).God save me．
(2).Heaven help us．
四、表命令
1.命令虚拟语气只能用在第二人称(you)，而且通常省略主语(也就是you)。
2.句子尾通常加上感叹号：！
3.虚拟语气动词用一般现在时态(Simple Present)，如：work, be , go
4.否定形式的命令语气，可用助动词do，加上not。
(1). Work !
(2). Work harder !
(3). Be more alert ! (虚拟语气动词Be)
(4). You go out !
(5). Do not work so hard. (do not 表示否定的虚拟语气)
(6). Don't be afraid. (口语中常用don't 代替do not)
五、在一些习惯表达中。如：
(1).You’d better set off now.你最好现在就出发。
(2).I’d rather not tell you the secret.我情愿不告诉你这个秘密。
虚拟语气(Subjunctive Mood)这一语法项目是各类英语考试中心测试的重点之一。虚拟语气是一种特殊的动词形式，用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测。
Ⅰ用以表示虚拟条件的虚拟语气
⒈ 用if条件从句表示的虚拟条件，是虚拟条件最普通的方式。
① 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过去式(be 一般用were)，主句用would/ should/ could/ might +动词原形，例如：If I were in your position I would marry her.
② 虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时即had＋过去分词，主句用would / should / could / might + have +过去分词，例如：If it had not rained so hard yesterday we could have played tennis.
③ 大多数的虚拟条件句属于上面三种情况的一种，但并不排除存在条件和后果中，一个和现在情况相反，另一个和过去情况相反，例如：If you had followed what the doctor said, you would not have been so painful now.这个句子在高中出现频率颇高。
④ 但是，如果后果用了虚拟语气，而条件却用陈述语气，这种用法是错的。
⒉ 除了表示虚假条件外，if从句还可以表示对将来的推测，由于是将来还没有发生的，所以谈不上是真实的还是虚假的，只能说这个事情发生的可能性有多大。一般情况下，可以用陈述语气的if从句来表示对一个未来事实的推测，这个事实是完全可能发生的。If从句的谓语形式用一般过去式或用were to / should +动词原形，主句用would / should /could/ might +动词原形，例如：Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.（1996年1月四级第44题）
⒊ 有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if 省去，而将had , should, were 等词提到主语之前，即用倒装结构,这时候，如果出现not等否定词，否定词需放在主语后面。这种结构在口语中很少使用，但频频出现在*中出现，例如：If it had not rained so hard yesterday we could have played tennis.→Had it not rained so hard yesterday, we could have played tennis.
⒋ 大多数的虚拟条件通过上面所讲的两种方法表达，但在个别句子中也可以通过介词without和介词短语but for表达，副词otherwise等表达出来。例如：We didn't know his telephone number; otherwise we would have telephoned him.（1995年6月四级第46题）值得注意的是，包含but for的句子，谓语动词必定要用虚拟形式，但包含without等短语的句子，谓语动词未必一定要用虚拟语气。
⒌ 有时虚拟条件不是明确地表达出来，而在蕴含在用but引导的从句里，于是便出现了有谓语动词是虚拟语气的主句加上谓语动词是陈述语气的but从句构成的并列复合句，例如I would have hung you but the telephone was out of order.在这样的句子里，如果主句没有用虚拟语气，或者从句用了虚拟语气，都是错的。
Ⅱ用在宾语从句中的虚拟语气
⒈ 在表示愿望的动词wish后的宾语从句中，需用虚拟语气。（wish后的that 常省略），根据主句时态，从句谓语时态相应退后一位，例如：How she wished his family could go with him.
⒉ 在具有愿望、请求、建议、命令等主观意愿的动词(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide …) 后的宾语从句中需用虚拟语气。谓语动词用(should) +动词原形。值得注意的是，如果宾语从句的动词是否定的，否定词not的位置应在动词之前，而不是动词之后。例如：The head nurse insisted that the patient not be move.另外，如suggest表达“暗示”，insist表示“坚持某种说法”时，后面的从句不用虚拟语气，例如：Her pale face suggests that she is ill.或He insisted that he did not kill the boy.
除此之外，上述动词也要求用虚拟式
① 在It is+上述动词的过去分词，其后所跟的主语从句中，如It is suggested that pupils wear school uniforms.
② 在上述动词相应的名词形式作主语+连系动词，其后的表语从句中，例如His suggestion was that classed be re-scheled.
③ 在对上述动词相应的名词进行解释的同位语从句中，如：The workers raised the demand that their pay be increased to cope with the inflation.
⒊ would （had）rather , would sooner也用来表达主观愿望，它们之后的宾语从句中需用虚拟语气。谓语动词用过去式表示现在或将来，用过去完成式表示与过去事实相反，例如：I would rather he went right now.
Ⅲ其他形式的虚拟语气
⒈ it is +necessary等形容词后，that主语从句中虚拟形式使用，这类形容词包括necessary, important, essential, imperative, urgent, preferable, vital, advisable等，例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.
⒉ 在It's (high/about) time 之后的定语从句中需用虚拟语气。谓语动词用过去式，例如It is high time that you went to school
⒊ 虚拟语气在as if / as though 引导的方式状语从句中的应用（谓语动词形式与wish后的宾语从句基本相同）表示与现在事实相反或对现在情况有怀疑，谓语动词用过去式。例如：He felt as if he alone were responsible for what had happened. 表示过去想象中的动作或情况，谓语动词用过去完成式。
⒋ 在lest 引导的状语从句中，谓语动词多用虚拟语气，(should )+ 动词原形。例如： The mad man was put in the soft-padded cell lest he injure himself.（1998年1月四级第38题）
⒌ 在if only 引起的感叹句中需用虚拟语气。谓语动词用过去式或过去完成式。例如： Look at the terrible situation I am in! if only I had followed your advice.
热心网友
时间：2022-06-17 03:06
1．一些常见的虚拟语气的句型或结构。
2．虚拟语气的特殊形式，即用来表示要求、建议、命令、提议、意愿等的主语从句、宾语从句、表语从句和同位语从句中的虚拟形式。
3．主从句表示不同的时间概念、事实或假设情况，从而交错成为复合虚拟语气。
4．含蓄条件句中的虚拟语气的表示愿望的虚拟形式。
上述四个要点往往在完形填空或者阅读理解里面存在，尤其是每年完形填空都至少有一道直接考这方面的知识的题目，而在阅读理解里，我们掌握上述四个重点对于我们理解文章的大意和作者态度很有帮助，了解哪些观点是作者假设的、虚拟的，哪些是真实的，这样对于我们回答关于作者态度观点题很有帮助。
下面我们将主要从上述四个方面来重点论述在考试中应该注意的问题。
一、虚拟语气的常见类型和句型
（1）由wish引起的表示愿望的虚拟语气
A．用wish表示对现在的愿望时，它所引起的宾语从句中谓语动词形式为：过去式（be动词用were）。
B．用wish表示对将来的愿望时，它所引起的宾语从句中谓语动词形式为：would, could, might+ 动词原形。
C．wish用于对过去的事实表示一种不可能实现的愿望时，宾语从句中的谓语动词形式为：had+动词过去分词或could, would + have +动词过去分词。
The picture exhibition bored me to death; I wish I had not gone to it.
---“I let Joe borrow our radio for the afternoon.”
---“That’s all right, but I wish he would buy one of his own.”
I wish that he weren’t so lazy.
(2)had hoped引起的宾语从句中备用语动词形式为would+动词原形，表示一种过去未实现的愿望或令人失望的事。
His father had hoped that his son would go to business with him, but his son became an artist later.
(3)would (had) rather, would as soon, would sooner和would prefer所引起的从句中要求用过去式表示当时或将来的情况，用过去完成时表示过去的情况，表示希望或婉转的责备。例如：
I’d rather you posted the letter right away. 我倒希望你把这封信立刻寄出去。
I would prefer he didn’t stay there too long.我倒希望他不要在那儿可得太久。
I would just as soon you had returned the book yesterday.我真希望你昨天把这本书还了。
（4）It’s (high, about) time that 句型中that从句中要求用虚拟语气形式，即动词要用过去式。
It’s time that something was done about the traffic problem downtown.
It is high time that we put an end to this discussion.现在是我们该结束讲座的时候了。
（5）as, 或者whether…or…谓语多用be的原形，引导让步虚拟从句，这种用法通常采用倒装结构：
Church as we use the word refers to all religious institutions, be they Christian, Islamivc, Buddhist, Jewish, and so on.
The business of each day, be it selling goods or shipping them, went quite smoothly.
（6）由连接词in case, so that ,unless, lest ,for fear that引起的状语从句中，谓语动词要用虚拟形式，即should(might, would)+动词原形，例如：
She put a blanket over the baby for fear that he should catch cold. 她在那个婴儿身上盖上了毯子以免他着凉。
The bad man was put in the soft-padded cell lest he injure himself.
(7) if it were not for…与现在事实相反， if it had not been for与过去事实相反，两个都相当于but for：
If it had not been for his help(=but for his help),we would not have succeeded.
(8) 虚拟语气用于as if（though）引起的方式状语从句和表语从句中，其动词形式与wish宾语从句的形式相同。例如：She often laughs spontaneously, and her good humor breaks out as brightly as if it were a part of the sunshine above.她常常发出发自内心的微笑，而且她那美好的情绪像天上一道明亮的阳光一样，常常流露出来。
They talked as if they had been friends for years.他们交谈着，就好像他们是我年的老朋友一样。
She looks as if she would cry.她看起来好像要哭了。
(9)其它各种句型, as though, suppose, had rather, supposing, if only等等
If I were in a movie, then it would be about time that I buried my head in my hands for a cry.
二、特殊形式的虚拟语气
虚拟语气的特殊形式，即用来表示要求、建议、命令、提议、意愿等的主语从句、宾语从句、表语从句和同位语从句中的虚拟形式，其虚拟语气的构成往往是由should(可省略)+动词原形that从句。
A、 用于表示意愿、建议、命令、提议、请求等动词后的that宾语从句中，这类动词有：
ask要求 advise建议 arrange安排 beg请求
command命令 decide决定 demand要求 desire渴望
determine决定 insist坚持 intend打算 maintain坚持主张
move建议，动员 propose提议 object反对 order命令
prefer建议 require 需要 request要求 resolve下决心
recommend推荐 suggest建议 stipulate约定，规定 urge强调，促进
vote公认，提议 decree颁布（法令） pray请求
注意：这类动词后面除了可接that虚拟句以外，也可以接doing或者to do…来表达，一般情况下，意思没有什么差别。
She advised that we should keep the gate locked.（书面体）
She advised us to keep the gate locked.（口语）
She advised keeping the gate locked.(较随便)
B、用于It is+形容词或过去分词+主语从句中，这类形容词或分词有：
advisable合理的 decided决定的 crucial关键的 appropriate恰当的
determined决定的 commanded命令的 arranged安排的 essential紧要的，基本的
complied遵照 anxious焦急的 imperative迫切的 important重要的
desirable合意的 better较好的，更好 insistent坚持的 desired想要
asked请求 keen渴望的 incredible难以置信的 adamant坚定不移的
natural自然的 insisted坚持 necessary必要的 suggested建议
urgent紧迫的 ordered命令 shocked震惊的 vital极其重要的
possible可能的 strange 奇怪的 preferable （好一点） proposed提议
requested要求的 required要求的 recommended推荐 resolved决定的
probable（可能的） pity可惜，憾事 shame遗憾
注意：这类形容词后面除了可接that虚拟句以外，也可以for…to do…
来表达，一般情况下，意思没有什么差别。
It is essential that he should be prepared for this.
It is essential for him to be prepared for this.
C．用于由表示建议、要求、命令、请示等含义的名词引导的表语从句和同位语从句中，这类名词常见的有：
advice忠告 decision决定 demand要求 desire要求、愿望
insistence坚持 motion提议 necessity必要性 order命令
preference偏爱 proposal提议 pray恳求 recommendation推荐
request要求 requirement要求 resolution决心 suggestion劝告、忠告
例如：
This is their resolution that extra-curriculum activities be made part of their school life.这是他们的决议：要使得课外活动成为他们学校生活的一部分。
The motion that the remark of the last speaker be expunged from the record.该提议要求把最后一个发言的人的讲话从记录上除掉。
三、混合虚拟语气
有时主句和从句的谓语动词指不同的时间，这时需要用混合虚拟语气。一般来说，在这种情况下，主从句谓语动词指代的时间不同，所以我们又可以错综时间条件句，在这种虚拟情况，动词形式应根据实际情况灵活使用，在做这些题目时候尤其要注意每道题目的提示语：时间状语。绝大多数情况下，从句或者主句都有相关的时间状语，这是我解题的关键。
If you that late movie last night, you wouldn’t be so sleepy.
A. haven’t watched B. didn’t watch
C. hadn’t watched D. wouldn’t have watched 答案选C。
Many dead would now be alive if they have not attempted to return for something.
Had Paul received six more votes in the last election, he would be our chairman now.
混合虚拟语气还有一种情况就是事实和虚拟假设的混合句，这样的句子不仅仅是时间的不同，而重要是事实和假设的混合。
I would have gone to visit him in the hospital had it been at all possible, but I was fully occupied the whole of last week.
该句前半部分是假设虚拟，而后半部分是事实的陈述。
Your math instructor would have been happy to give you a make-up examination had you gone and explained that your parents were ill at the time.
该句前半句用的是假设虚拟，后半句主句也用的是假设虚拟（如果你去并且解释的话），但是后半句的从句用的是事实语气，因为“父母病了”是客观事实，故不需要用虚拟形式had been。
四、含蓄虚拟条件句
含蓄条件句是指句中没有明显的虚拟条件句，而是利用其他手段来暗示存在虚拟条件。但是这类隐含式虚拟条件句往往都可以转化为if引导的条件句。常来表示含蓄虚拟条件的手段有：
（1）介词或介词短语，如but for, but that, without, in case of, under more favorable condition等。
the leadership of the party, we could not be living a happy today.=If there hadn’t been the leadership of the party, we could not be living a happy today.
A. In spite of B. But for C. Because of D. As for 答案选B。
But that she was afraid, she would have said no.
(2)连词，如：so that, unless, in case, supposing, lest, provided(倘若……)，for fear that(唯恐)，in order that, on condition that, if only(要是……就好了)等。
She listened carefully in order that she might discover exactly what he wanted.=if she listened carefully ,she might discover exactly what he wanted.
If only I had more money, I could buy a car.
(注：lest, for fear that 和 in case 引起的从句中谓语动词多用should+动词原形，但可以不用虚拟语气，而用动词的陈述语气形式。)例如：
The foreign teacher spoke slowly in case we misunderstood him. 这位外籍教师说得很慢以免我们听不懂。
Care must be taken in using this method lest overflow should occur.在使用此法时要小心谨慎，以免会发生溢流现象。
（3）通过上下文及内在含义，句中往往有but, otherwise, unfortunately等类似转折词。
I thought the children when we returned home, but they were still awake.
A. were sleeping B. would be sleeping C. had been sleeping D. would sleep选择 B。
(4)形容词及其比较级
A more careful person would not have made so many mistakes.
A less conscientious man wouldn’t have tried so hard to get this job done.
(5)分词短语
Having known in time, we might have prevented the accident.
Born ten days earlier, the boy could have seen his late father.
(6)动词不定式短语。一般intended/meant/hoped/wished/planned 或 was/were+不定式完成式或had intended/meant/planned/hoped/wished/+不定式一般式表示虚拟。
I intended I should call on you, but I was busy at that time.
To hear him speak French, you would take him for an Englishman.
She would be stupid not to accept his invitation.
It would be easier to do it this way.
(7)名词短语和名词+and结构
A judicious man would not have committed suicide.
A diligent student would have worked harder.
(8)独立主格结构
All things considered, the price would be reasonable.
(9)定语从句
Anyone who had been in your position would have done the same.
A nation, which stopped working, would be dead in a fortnight.
(10）情态动词完成式暗示虚拟语气：
I should have called to make an airline reservation, but I didn’t.
The porter ought to have called the fire-brigade as soon as he saw the fire in the stock, which went up in smoke.
(11)动词原形表示虚拟
动词原形直接用在句子中也被看作是一种虚拟，最常见于正式文体中，动词原形一般用在条件从句中，有时倒装置于句首，同时这种用法也常见于独立句中表达愿望。
God bless you!
All magnets behave the same, be they large or small.
She’ll be sixteen years odd, com May.(come May =when May come).
If that be so, we shall take action at once.
彬彬来自爱问知识人2004-12-03 22:37
评论(3)
提问者对答案的评价：
为您推荐的相关问题
be to do 和be about to do 有什么区别2007-12-01 21:57
lie说谎，lie平躺，lay放置，下蛋这几个词语怎么区别记忆啊？2005-07-28 12:41
imagine 的用法2005-06-11 18:47
when，as，while的区别2005-11-24 08:34
belong 和 belong to 的用法
热心网友
时间：2022-06-17 03:07
网络上的解释可能会有所纰漏。高级语法书上写的用法更详细些。如果你能掌握了，那么高中虚拟语气就不在话下了。
直接拍下照片打包发给你了。（又拍又传的，好累。。=。= 3财富值就算辛苦费吧 ：p）
望采纳～谢谢
热心网友
时间：2022-06-17 03:07
