虚拟语气详解

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英语中虚拟语气的详解。。。 谢谢~

虚拟语气用来表示说话人的主观愿望或假想,而不表示客观存在的事实,所说的是一个条件,不一定是事实,或与事实相反。虚拟语气通过谓语动词的特殊形式来表示。英语中的语气分为陈述语气、祈使语气、虚拟语气三类。
虚拟语气常在表示条件和结果的状语从句中。在表示与事实相反的虚拟语气时动词有三种时态:现在时,过去时,将来时,过去完成时,现在完成时。 在条件句中的应用:条件句可分为两类,一类为真实条件句,一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况,故采用虚拟语气。 虚拟语气
在什么情况下用虚拟语气? 在表示虚假的、与事实相反的或难以实现的情况时用虚拟语气,表示主观愿望或表示某种强烈情感时,也用虚拟语气。即当一个人说话时欲强调其所说的话是基于自己的主观想法,而不是根据客观实际,就用虚拟语气。

虚拟语气在非真实条件状语从句中的用法
1、真实条件状语从句与非真实条件状语从句
------------------------------------------------------------------------ eg . If he doesn’t hurry up, he will miss the bus. 如果他不快点,他将错过巴士。( 真实条件状语)(不是虚拟语气) If he is free, he will ask me to tell stories. 如果他是空闲的,他会要求我讲故事。(真实条件状语)(不是虚拟语气) If I were you, I would go at once.如果我是你,我马上就会去。 (非真实条件状语从句) If there were no air, people would die. 如果没有空气,人就会死亡。(非真实条件状语从句)
2、用法及动词形式
1、表示与现在事实相反的情况: if+主语+过去时+其他+主语+should/would/could/might+do+其他 例: 1.If I were you, I would take an umbrella.如果我是你,我会带把伞。(事实:我不可能是你) 2.If I knew his telephone number, I would tell you. 如果我知道他的电话号码,我就会告诉你。(事实:不知道) 3.If there were no air or water, there would be no living things on the earth. 如果没有水和空气,地球上就不会有生物。(事实:地球上既有空气也有水) 4.If I had any money with me, I could lend you some. 如果我带钱了,我就会借给你些。(事实:没带钱) 5.If he studied harder, he might pass the exam.如果他再努力些,就能通过考试了。(事实:没有努力 2、表示与过去事实相反的情况 if+主语+had done +其他+主语+should/would/could/might+have done+其他 例: 1. If I had got there earlier, I should/could have met her. 如果我早到那儿,我就会见到她。(事实:去晚了) 2.If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话,就不会犯这样的错误了。(事实:没有听我的话) 3、表示对将来情况的主观推测 ①if+主语+were to do+sth.+主语+should/would/could/might+do+其他 ② if+主语+did/be(were)+sth.+主语 +should/would/could/might+do+其他 ③if+主语+should+do+sth.+主语 +should/would/could/might+do+其他 例: 1.If he should come here tomorrow, I should/would talk to him. 如果他哪天来这儿的话,我就跟他谈谈。 (事实:来的可能性很小) 2.If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪,我们就不能去滑冰了。(事实:不知能否下雪) 3.If she were to be there next Monday, I would tell her about the matter. 如果她下周一来这儿的话,我就会告诉她这件事的始末。 在表示建议、命令、要求等含义的宾语从句,谓语动词常用虚拟语气,"should+动词原形"构成,should 可省略。 4、 有时,虚拟条件句中,结果主句和条件从句的谓语动作若不是同时发生时,虚拟语气的形式应作相应的调整。 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,我现在也会成为一个工程师了 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,庄稼会长得更好。 If he had been working hard, he would be working in the office now. 要是他一直努力工作的话,他现在已进了办公室了。 5、 当虚拟条件句的谓语动词含有were, should, had时,if可以省略,这时条件从句要用倒装语序,即将were, should, had等词置于句首,这种多用于书面语。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,我们已经聘用他来这里工作了。 6、非真实条件句中的条件从句有时不表达出来,只暗含在副词、介词短语、上下文或其他方式表示出来,这种句子叫做含蓄条件句,在多数情况下,条件会暗含在短语中,如without…., but for….等 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。 We didn’t know his telephone number; otherwise we would have telephoned him. 我们不知道他的电话号码,否则我们就会给他打电话。 7、 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. 你应该能通过这次考试了。 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。、


。。。。。。。。。。。

等等 ,详见百科“虚拟语气”

语法教学材料:虚拟语气

虚拟语气表示说话人的愿望、假设、猜测或建议,而不表示客观存在的事实。虚拟语气通过谓语动词的特殊形式来表示,下面对虚拟语气在各种句式中的用法分别介绍。
虚拟语气用于条件状语从句。
表示与现在事实相反的假设时,条件状语从句中的谓语动词用“过去式(be的过去式用were)”,而主句中的谓语动词用“would(should, could, might)+动词原形。”例如:
If I were you, I should studay English.
If he had time, he would attend the meeting.
表示与过去的事实相反的假设时,条件状语从句的谓语动词用“had +过去分词”,主句中的谓语动词用“would(should, could, might)+have +过去分词”。例如:
If you had taken my advice, you wouldn’t have failed in the examination.
表示与将来事实相反的假设时,条件从句和主句所用的谓语动词怀“表示与现在事实相反的假设”的谓语动词相同,或者条件从句中用“were to(should)+动词原形”。例如:
If you come tomorrow, we would have the meeting.
If it were to rain tomorrow, the meeting would be put off.
当条件状语从句表示的行为和主句表示的行为所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。例如:
If you had worked hard, you would be very tired.
(从句说的是过去,主句指的是现在.)
5.以上句型可以转换成下列形式:
1)省略if,用“were, have, should +主语”. 例如:
Were I in school again, I would work harder.
Had you been here earlier, you would have seen him.
Should there be a meeting tomorrow, I would come.
但在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式,如我们可以说:
Were it not for the expense, I would go to Italy.
但不能说
Weren’t it for the expense, I would go to Italy.
2)用介词短语代替条件状语从句.例如:
Without air, there would be on living things.
But for your help, I couldn’t have done it.
3)用其了方式表示.例如:
It would produce had results to do that.
= If you have done that, it would produce bad results.
(二)虚拟语气用于宾语从句
“wish +宾语从句”表示不能实现的愿望,汉语可译为“可惜……”. “……就好了”, “悔不该……”, “但愿……”等.
表示现在不能实现的愿望,从句的谓语动词用过去式;表示将来不能实现的愿望用“would(could) +动词原形”;表示过去不能实现的愿望时用“had +过去分词”或“(could)would +have +过去分词”.例如:
I wish it were spring all the year round.
I wish you could go with us.
We wish we had arrived there two hours earlier.
虚拟语气在动词arrange, command, demand, desire, insist, order, propose, request, require, suggest,等后面的宾主从句中用“(should)+动词原形”.例如:
We suggested that we (should) have a meeting.
We insisted that they (should) go with us.
The doctor ordered that she (should) stay in bed for a few days.
He demanded that we (should) start right away.
注意:insist作“力言”, “强调”解时,宾语从句不用虚拟语气,只有当insist作 “坚持(认为)”, “坚持(应该)”解时宾语从句才用虚拟语气.例如:
Mike insisted that he had never stolen anything.
(三)虚拟语气用于表语从句、同位语从句
作advice, idea, order, demand, plan, proposal, suggestion, request等名词的表语从句和同位语从句,其谓语动词要用虚拟语气的结构“(should)+动词原形”.例如:
We all agreed to his suggestion that we (should) go to Beijing for
sightseeing.
My idea is that we (should) exercises first.
(四)虚拟语气在 as if(as though),even if( even though)等引导的表语从句或状语从句中的应用.
如果从句表示的动作发生在过去,用过去完成时,指现在状况,则用过去时,指将来则用过去将来时.例如:
He looked as if he were an artist.
He speaks English so fluently as if he had studied English in England.
Even if he were here,he could not solve the problem.
(五)虚拟语气用于主语从句.
在主语从句中,谓语动词的虚拟语气结构用“ should 十动词原形”的结构,表示惊奇、不相信、惋惜、理应如此等.例如:
It is necessary( important,natural,strange,etc) that … we should clean
the room every day.
It was a pity ( a shame,no wonder,etc) that you should be so careless.
It will be desired( suggested,decided,ordered,requested,proposed,etc)
that she should finish her homework this afternoon.
在上述三种主语从句中,should意为“应该”,“竟然”,可以省去,但不可换用would.主句所用动词的时态不限.
注意:这种从句表示的是事实.如果说话人对这种事实表现出惊奇的情感,就可用虚拟语气.反之,如果不表示惊奇等情感.That从句也可用陈述语气,例如:
It is a strange that he did not come yesterday.
It is a pity that you can’t swim.
(六)虚拟语气用于定语从句
这种从句常用在 It is( high) time( that)…句型中,定语从句的谓语动词用过去式,或 should十动词原形( should不能省略,be用 were)来表示,意为“(现在)该……”。例如:
It is ( high) time we left (should leave).
lt is high time we were going.
(七)虚拟语气用于 if only引导的感叹句中
If only I had taken his advice.
我要是听他的话就好了.
If only I were a bird.我如果是一只鸟就好了.
(八)虚拟语气在简单句中的应用
l)情态动词的过去式用于现在时态时,表示说话人谦虚、客气、有礼貌或语气委婉,常出现在日常会话中,例如:
It would be better for you not to stay up too late.
Would you be kind enough to open the door?
2)用于一些习惯表达法中,例如:
Would you like a cup of tea?
I would rather not tell you. You had better go now. 3)用“ may 十动词原形”表示“祝愿”、“但愿”. may须置于句首,例如:May you be happy! May you succeed!







虚拟语气是一种动词形式,表示说话人的一种愿望,假设,怀疑,猜测, 建议等含义,虚拟语气所表示的含义不是客观存在的事实。
                     
  If I were you, I'd take them away.
                     
  如果我是你的话,我就会带走他们。
                     
  If I had met Li Hua, I could had told him.
                     
  如果我碰见了李华,我就告诉了他了。
                     
  If I had time. I could come to help you.
                     
  如果我有时间,我会来帮助你的。
                     
  He suggested that our class should be divided into five groups.
                     
  他建议说我们的班应该分成五个小组。
                     
  He speaks to us as if he had been there.
                     
  他给我们讲的好象他去过那儿。
                     
  虚拟语气的用法
                     
  1) 虚拟语气用在简单句中,表示祝愿,命令。
                     
  May you be happy.
                     
  祝你幸福。
                     
  May you have a good time.
                     
  祝愿你玩的痛快。
                     
  May the friendship between us last long.
                     
  祝愿我们的友情天长地久。
                     
  Have a good journey!
                     
  祝愿你旅途愉快!
                     
  You go out!
                     
  你出去!
                     
  2) 虚拟语气用在宾语从句中。动词 wish, suggest,order,insist, propose,等词后面的宾语从句表示的是一种虚拟语气, 宾语从句中的动词动作表示的只是一种愿望,要求。
                     
  I wish she would be on my side.
                     
  我希望她能站在我一边。
                     
  I wish I could help him.
                     
  我希望我能帮助他。
                     
  He insisted that all of us should be there on time by any means.
                     
  他坚持要我们大家想尽办法按时去那儿。
                     
  动词 demand, suggest, order, insist, propose 后面的从句中,"should" 可以省略。
                     
  The teacher suggested that we (should) clean the blackboard after class.
                     
  老师建议我们课后把黑板擦了。
                     
  He ordered that the students wash the clothes every week by themselves.
                     
  他要求学生每周都要自己洗衣服。
                     
  3) 虚拟语气用在主语从句中。
                     
  在句型 "It is important (necessary, strange, natural) that .... " 中,that 后面的从句中的谓语动词用: should + 动词原形
                     
  It's necessary that we should have a walk now.
                     
  我们有必要出去散散步。
                     
  It's natural that she should do so.
                     
  她这样做是很自然的。
                     
  It's important that we should take good care of the patient.
                     
  重要的是我们要照顾好病人。
                     
  4) 虚拟语气用在状语从句中。
                     
  虚拟语气最多地用在表示条件的状语从句和表示结果的主句中。在表示与事实相反的虚拟语气时,动词有三种时态形式,即现在,过去和将来。
                     

  与现在事实相反的:

                     
  条件从句 结果从句                   
  If I (we,you,he,they)+ 动词过去式.. if I (he,she) were... I (we) should + 动词原形。 He (you,they) would + 动词原形。
                     

  与过去事实相反的:

                     
  条件从句 结果从句                   
  If I(we,you,he,they)+ had + 过去分词 I(we)should + have+ 过去分词。He (you,they) would + have + 过去分词。
                     
  If I were you, I should buy it.
                     
  如果我是你,我就买了它。
                     
  If I had time, I would study French.
                     
  如果我有时间,我会学习法语的。
                     
  If she knew English,she would not ask me for help.
                     
  如果她懂英语的话,她不会找我帮忙的。
                     
  If you had got up earlier, you could have caught the train.
                     
  如果你早一点起床,就会赶上火车的。
                     
  If it were fine tomorrow,I would go shopping.
                     
  如果明天天气好,我就去买东西。
                     
  有关虚拟语气的几个问题:
                     
  1) 有时if引导的状语从句可以省略 if,而把从句中的动词 were, had 或 should 移到主语前面。
                     
  Were she younger, she would do it .
                     
  如果她年青点, 她就会干的。
                     
  Had he known her address, he would had gone to visite her.
                     
  如果他知道她的地址,他会去看她的。
                     
  2) 有时表示虚拟语气的条件从句或者主句都可以省略,而只剩下一个主句或者一个条件从句。
                     
  I could help you.
                     
  我本来可以帮助你。
                     
  If I had time.
                     
  我要有时间该多好啊。
                     
  She should have come to the party.
                     
  她应该来参加聚会。
                     
  If he had much more money.
                     
  如果他有更多的钱就能...。
                     
  3) 虚拟语气中,条件从句的动词动作可以和主句的动词动作时态不一致。
                     
  If they had studied hard, they could do it easily now.
                     
  如果他们以前努力学习的话,现在干的就会容易些。
                     
  If he had not taken my advice, he wouldn't do it much better like this.
                     
  如果他不听取我的建议,他就不会干得这样好。








虚拟语气

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一、虚拟语气表示一种不能实现的假设。该语法主要用于if条件状语从句。也可用于主语从句、表语从句、宾语从句等。

二、if条件状语从句中虚拟语气的判断
  判断是真实条件句还是非真实条件句。只有在非真实条件句中才使用虚拟语气。通过句子意思,看假设的条件是否能够实现,能够实现是真实条件句,不能使用虚拟语气;假设的条件不能实现则是非真实条件句,要用虚拟语气。
  判断这个假设是与哪个事实相反。通常有三种情况:

1与过去事实相反。

2与现在事实相反。

3与将来事实可能相反。


三、“后退一步法”
  后退一步法是指在准确地判断了该句与哪一事实相反后,按虚拟语气的后退一步法处理从句谓语动词的时态。即:在非真实条件状语从句中,谓语动词按正常情况“后退一步”。

也就是:

1 与过去事实相反,在从句中用过去完成时形式表示。
2 与现在事实相反,在从句中用过去一般时形式表示。
3 与将来事实可能相反,在从句中用过去将来时形式表示。 
 主句中则用情态动词would, should, could 等加一个与从句一致的动词形式。

If I had come her yesterday, I would have seen him.
If I were a teacher, I would be strict with my students.
If it should snow tomorrow, they couldn’t go out.


三、would rather +从句
在这种结构中,从句的位于动词用过去形式表示虚拟。
  I would rather you did this instead of me

 

四 宾语从句中的虚拟语气

advise, direct, agree, ask, demand, decide, desire, insist, order, prefer, propose, request, suggest 后的从句
其从句谓语的动词应用:should+原形动词

所谓虚拟语气有两种用法:一种是表示把不存在或不可能存在的说成存在的,这种虚拟用于条件从句;一种表示委婉的愿望、要求、建议、命令,用于名词从句后口号中。

一、条件虚拟
1. 与现在事实相反:
If they had time now, they would study German too. (言外之意是说说没有时间,也不会学德语)
2. 与过去事实相反:
I should have died of hunger if you hadn't saved me. (言外之意是但是你确实救了我,我也没死。)
3. 与将来事实可能相反
If it should rain tomorrow, what would you do? (言外之意明天下午的可能不大)
4. 混合条件句: 如果想表达对错开时间的虚拟,就可以用把对不同是时间的虚拟动词
If you whould not have set off yesterday, you should not reach there tommorrow. 你要是昨天不动身,明天就不会按时到达。(言外之意昨天动身了,明天也有可能到达。)
二、委婉虚拟
1. 用于表示愿意、建议等的名词从句, 谓语动用 should do 或省去 should 直接用动词原形。
He suggested that she (should) go at once.
The teacher demanded that we (should) hand in our homework next period.
2. 在 wish that(但愿如何),it's time that (早该如何) ,would rather that (宁可如何),had better that (建议最好如何)等句式中表示愿望、责备的语气,谓语动词形式同 if 从句,如:
I wish I were still a little child. 我要是个小孩子就好了。
It's high time that you got up. 你早就该起床了。
He would rather that you came tomorrow. 他宁可让你明天来。
They had better that they had come yesterday. 他们希望最好昨天就来。
三、至于真实条件句其实就是不含有言外之意的真实语气,即存在的或可能存在的事实,在 if 从句中只有一个要求,那就是用现在时态表示将来,如:
If you come tomorrow, I will meet you at the station. 如果你明天来,我会在车站接你。 (注意从句中不能用 will come)。

非真实条件状语
① 表示与现在事实相反的情况:
主语+should/would/could/might+do+其他+if+主语+did/be(were)+其他
例:
1.If I were you, I would take an umbrella.
2.If I knew his telephone number, I would tell you.
②表示与过去事实相反的情况
主语+should/would/could/might+have done+其他+if+主语+had done +其他
例:
1. If I had got there earlier, I should/could have met her.
2.If he had taken my advice, he would not have made such a mistake.
③表示对将来情况的主观推测(可能相反或可能性很小)
主语+should/would/could/might+do+其他+if+主语+did/should/were to do+其他
例:
1.If he would come here tomorrow, I should/would talk to him.
2.If there were a heavy snow next Sunday, we would not go skating.
虚拟语气的其他用法
①、虚拟语气用在wish 后的宾语从句
②虚拟语气用在一想要(desire)一宁愿(prefer)二命令(order. command) 三建议(advise. suggest. propose) 五要求(demand. require. request. desire.insist)中,无论主句谓语动词为何种时态,从句的谓语动词都用:“should + 动词原形”或只用“动词原形”。
③表情绪.观点的形容词或名词也要用虚拟语气.如:necessary. important. impossible. natural. strange. surprising.

应该符合你的问题吧~~


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