虚拟语气具体用法的讲解

作者&投稿:步显 (若有异议请与网页底部的电邮联系)
虚拟语气的详细用法是怎样的?~

虚拟语气的详细用法是与现在事实相反、与过去事实相反、与将来事实相反三种用法,只需要理解之后进行相关的应用即可。具体的 操作如下:
1、虚拟条件句的三种基本类型:与现在事实相反、与过去事实相反、与将来事实相反。
2、与现在事实相反,条件从句的谓语用过去式,主句谓语用should(would,could,might)+动词原形。
3、与过去事实相反,条件从句的谓语用过去完成时(had+过去分词),主句谓语用should(would,could,might)+have+过去分词。
4、与将来事实相反,条件从句的谓语用过去式(be通常用were),主句谓语用should(would,could,might)+动词原形。

注意事项:
1、书写英语单词的时候一定要认真书写,防止有的字母之间混淆错误。
2、学习虚拟语气的详细用法时可以理解记忆,切不可盲目死记硬背,这样会得不到好效果。

虚拟语气
1.主语从句中的虚拟语气主语从句中的虚拟语气主要取决于某些形容词和过去分词,用来表示建议、命令、要求、惊异和失望等。其形式为:(should)+动词原形。

常这样用的形容词有:

appropriate适当的advisable适当的,合理的better较好的desirable理想的essential精华的imperative迫切的important重要的insistent坚持的natural自然的necessary必要的preferable优越的,较好的strange奇怪的urgent紧迫的vital极其重要的

过去分词有:

desired, demanded, ordered, requested, suggested, recommended, required等。

例如:

It is essential that you (should) win the voters’hearts.赢得选民的心是绝对必要的。

It was suggested that he (should) join the club activities.有人提议他应该参加俱乐部的活动。

2.表语从句和同位语从句中的虚拟语气在表示建议、命令、主张、目的和愿望等名词后面的表语从句和同位语从句中谓语动词要求使用虚拟语气。其形式为:(should)+动词原形。

常这样用的名词有:

resolution决心,决议pray恳求decision决议motion提议suggestion建议preference选择proposal提议advice劝告recommendation推荐desire愿望demand要求requirement要求order命令necessity必要性request要求idea主意、想法例如:

He gave orders that the guests (should) be hospitably entertained.他下令热情款待这些客人。

His proposal is that we (should) get rid of the bad habits.他提议我们应该摈弃这些不良习性。

3.宾语从句中的虚拟语气

1)某些动词后所接宾语从句中的谓语动词要求用虚拟语气,用来表示建议、命令和要求等。其形式为:(should)+动词原形。常这样用的动词有:

ask要求advise劝告determine决定decide决定command命令insist坚持intend打算move提议prefer宁愿propose提议order命令recommend推荐request要求require要求suggest建议urge主张demand要求desire渴望direct命令例如:

He insisted that the meeting be put off.他要求推迟那个会议。

They proposed that all the plans should be discussed at the meeting.他们建议所有的计划都应该在会上讨论。

2)在以it为形式宾语的复合宾语从句中也可以用虚拟语气,其形式为:(should)+动词原形。这一句型中使用的形容词(宾补)与主语从句中的虚拟语气所使用的形容词相同。例如:

We think it advisable that he (should) think deeply before acting.我们认为他在行动之前好好考虑一下才是明智的。

3)wish后面所跟的宾语从句中的虚拟语气表示某种不能实现的愿望。

其主要形式有三种:

表示对现在情况的虚拟:wish +主语+动词过去式或were表示对过去情况的虚拟:wish +主语+ had +过去分词表示对将来情况的虚拟:wish +主语+ would +动词原形。

例如:

I wish I knew what was going to happen.但愿我能知道要发生什么事。

She wished she had stayed at home.她懊悔的是她当时要是在家就好了。

I wish I were rich.我恨不得我很有钱。

注意:在表示对过去情况的虚拟时,有时也可以用下列形式:

wish +主语+ would(could)+ have +过去分词I wish I could have seen her last night.要是我昨天晚上能够见到她那该多好。

4. if条件句中的虚拟语气形式1)if非真实条件句所表示的假设则是不可能或不大可能发生或实现的,句中的主句与从句都用虚拟语气。

在if非真实虚拟条件句中,主句和从句谓语动词主要有下面几种形式:

假设类型条件从句谓语动词形式主句谓语动词形式与现在事实相反动词过去时(be用were)Should(would,could,might)+动词原形与过去事实相反Had +过去分词Should(would,could, might)+ have +过去分词与将来事实可能相反动词过去时(should+动词原形,were to +动词原形)Should(would,could,might)+动词原形

If there were no gravity, we should not be able to walk.假如没有引力,我们就不可能行走。

I wouldn’t have known what these were for if I hadn’t been told.假如别人不告诉我,我就不知道这些东西是干什么的了。

2)正式文体中,有时可把虚拟条件句中的连词if省去,而将were,had, should等助动词(不包括行为动词)提到主语前面。如果句中没有were,had或should时,既不能省略if,也不能倒装。例如:

Were I to meet him tomorrow (= If I were to met him tomorrow), I should ask him about it.要是我明天见到他,我就会问他这件事的。

Had I had the money last year (= If I had had the money last year), I would have bought the house.如果我去年有了这笔钱,我就买那所房子了。

Should there be any trouble with the boiler, the automatic controlling unit would cut off the fuel oil supply.假如锅炉出问题的话,自控装置会自动切断燃油的供给。

3)通常情况下,在非真实条件句中主句和从句的谓语动词所指时间是一致的,但有时也可能指不同的时间,这时要根据上下文的意思采用不同的谓语动词形式。例如:

If I were you, I would have taken his advice.我要是你,我就采纳了他的建议。(从句指现在,主句指过去)

If the weather had been more favorable, the crop would be growing still better.如果气候更适宜一些,庄稼会长得更好。(从句指过去,主句指现在)

5.含蓄虚拟条件句1)有时假设的情况并不以条件从句形式表示出来,而是通过一个介词短语或其他方式表示。常用的词或短语有:without, but for, but that, otherwise, or, but等。例如:

Without your help (=If we had not had your help), we could not have succeeded.要是没有你的帮助,我们就不会成功的。

But for electricity (= If there were no electricity), there would be no modern industry.要是没有电,就不会有现代工业。

He was having a meeting; otherwise he would have come over to help us.他当时正与他的学生进行讨论,否则的话他就来帮我们了。

He felt very tired yesterday, or he would have attended the party.他昨天很累,不然他就参加那个聚会了。

2)在某些暗含虚拟条件的简单句中,虚拟语气可通过上下文表现出来。谓语动词用should/ would be形式和should/ would have been虚拟形式。例如:

Any men in his position would have done like that.任何人处在他的位置都会那么做的。

You should (ought to) have come earlier.你本应来得早点。

6.其他句型中的虚拟语气1)在would rather, would sooner, would just as soon, might as well和would prefer等后面所跟的从句中,也可以用虚拟语气,表示愿望,意为“宁愿、但愿”。其形式为:

①“would rather (would sooner…) +主语+谓语动词过去式”表示现在或将来的情况。

②“would rather (would sooner) +主语+动词过去完成式”表示过去的情况。例如:I’d rather he didn’t go now.要是他现在不走就好了I’d just as soon you had been here yesterday.要是你昨天在这里就好了。

2)在句型“It is (high/ about) time…”后面也可以跟虚拟语气,从句中常用过去式。有时也用“(should)+动词原形”,意为“该是……的时候了”。例如:

It is time that the boy (should) go to school.这个小孩该上学了。

It is high time (that) the weather improved.天气真该好起来了。

3)在“if only”引起的感叹句中也要求用虚拟语气,表示愿望。

形式为:①用过去时或“would/ could +动词原形”表示与现在或未来事实相反的愿望。

②过去完成时表示与过去事实相反的愿望。例如:

If only you would listen to our advice.要是你听我们的建议就好了。

If only I had not been busy last week!要是上周我不忙该多好啊!

If only she could marry me.但愿她能嫁给我。

注:if only也可以用于虚拟条件句中。例如:

If only I had more money, I could buy a car.要是我有更多的钱,我就可以买辆车了。

4)连接词“in case, lest, for fear that”可以用来引导虚拟语气。其形式通常为:“…lest (in case, for fear that) +主语+ should +动词原形”。Lest, for fear that句中的should可以省去,in case句中的should通常不省去,但是in case句中可以不用虚拟语气,而用陈述语气。Lest, for fear that后面也可以接其他形式。例如:

He took his coat with him in case it should rain.他带着雨衣以防下雨。

I will not make a noise for fear that I (should/ might) disturb you.我不会做声的,以免打扰你。

Care must be taken in using this method lest overflow (should) occur.在使用这以方法的时候要谨慎小心,以免发生溢流现象。

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

1、表示与现在事实相反的情况:   
从句:主语+过去时   
主句:主语+should/would/could/might+do   
eg:    
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)

  2、表示与过去事实相反的情况
从句:主语+had+done   
主句:主语+should/would/could/might+have done    
eg:   
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   
从句:主句
①if+主语+were to do :①主语+should/would/could/might+do   
②if+主语+did/were ②主语+should/would/could/might+do    
③if+主语+should+do ③主语+should/would/could/might+do    
eg:   
1.If he should come here tomorrow,I would talk to him.   如果他明天来这儿的话,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 here 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。

希望能帮到你


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