定义:虚拟语气指不可能实现的愿望或与事实相反的情况,而不表示客观存在的事实大致可分为以下几种情况:,我来为大家讲解一下关于怎么学好英语虚拟语气?跟着小编一起来看一看吧!

怎么学好英语虚拟语气(英语语法学习)

怎么学好英语虚拟语气

定义:虚拟语气指不可能实现的愿望或与事实相反的情况,而不表示客观存在的事实。大致可分为以下几种情况:

一、 虚拟条件句

(一)含有if条件句的主从句的虚拟语气

与事实相反

条件从句的谓语形式

主句的谓语形式

表示现在情况

过去式(did)

(be常用were)

Would / could / might / should 动词原形(do)

表示过去情况

过去完成式(had done)

Would / could / might / should have done

表示将来情况

①过去式 (did)

②should do

③were to do

Would / could / might / should 动词原形(do)

总结:

1. If 条件句中谓语动词的虚拟结构是在原来陈述语气所用时态的基础上倒退一个时态(对将来虚拟的were to do/should do例外)

2. 主句要借助于情态动词的过去式,后跟动词原形(现在或将来)或have done(过去);if条件句中只出现一个情态动词,即对将来虚拟的should.

3.做此类题目时一定要分清是从句还是主句谓语动词的虚拟,还要把握好时态。

注意:1. 在虚拟条件从句中,动词“be”的过去时态一律用”were”,不用was。

2. 在虚拟条件状语中如果有were, should, had这三个词中任何一个,可省略if,把这三个词提到主语之前, 变成:were/should/had 主语 剩余成分。

3.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。如我们可说Were I not to do., 而不能说Weren‘t I to do。

4.在表示与将来事实相反的条件句中,只能用should,而不能用would,could和might 等。

5.主句中的should通常用于第一人称,would,could以及might可以用于各种人称

eg :

① If 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。

② I wish I could pass the examination.

我希望我能通过考试。

在虚拟条件句中,对于与将来事实相反的情形,请注意以下几点:

(1) 条件从句表示的内容与将来事实相反,实为对将来情况的推测,用过去时表示虚拟;

(2) 条件从句谓语除用过去式外,有时也用“should 动词原形(表示可能性极小,常译为“万一”)”或“were to 动词原形(表示与将来事实相反的假设)”;

(3) 条件从句使用“should 动词原形”这样的谓语形式时,主句谓语除可用“should (would, could, might) 动词原形”这样的虚拟语气形式外,也可用直陈语气或祈使语气。试比较:

If it should rain tomorrow, don’t expect me. 万一明天下雨,就不要等我了。(祈使语气)

If I should see him, I’ll tell him. 万一我见到他,我就告诉他。(直陈语气)

当条件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were代替was。特别是在倒装虚拟结构及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 to grasp the chance. 要是我是你的话,我要尽力抓住这次机会。

有时虚拟条件句中,主、从句的动作若不是同时发生时,即错综时间虚拟条件句。所谓错综时间虚拟条件句即条件从句与主句所指时间不一致,如从句指过去,而主句即指的是现在或将来,此时应根据具体的语境情况,结合上面提到的三种基本类型对时态作相应的调整。具体分为下面三种情况:

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 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 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 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。

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。

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。

But that I saw it, I wouldn’t have believed it. 要不是我亲眼目睹,我还不信呢。

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。

【注意】but for后接sth,but that后接从句。

有时虚拟条件句中,主、从句可省略其中一个,来表示说话人的一种强烈的感情。如:

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。

两个常考if虚拟语气句型。

这两个句型是If it weren’t for…If it hadn’t been for…,其意为“若不是(有)、要不是有”,可以用But for或Without介词短语替换。如:

If it weren’t for water, no plant could grow. 要是没有水植物就无法生长。

If it hadn’t been for your assistance, we wouldn’t have succeeded.

= But for your assistance, we wouldn’t have succeeded.

= Without your assistance, we wouldn’t have succeeded.

二、虚拟语气的其它句型:

1、wish后面的宾语从句用虚拟语气

▲ 基本用法:动词wish后接宾语从句时,从句谓语要用虚拟语气。

① 若要表示与现在事实相反的愿望,从句谓语用一般过去时或过去进行时;

② 若表示与过去相反的愿望,从句谓语用过去完成时或would / could have 过去分词;

③ 若表示将来没有把握或不太可能实现的愿望,用would (could)+动词原形。

特别注意 从句的时态只与从句所指的时间有关,而与wish的时态无关。比较:

I wish I were rich. 要是我现在有钱就好了。

I wish I had been rich. 要是那时我有钱就好了。

I wished I were rich. 当时我后悔自己没有钱。

I wished I had been rich. 当时我后悔自己曾经没有钱。

2、if only后面的句子用虚拟语气

▲ 基本用法:if only 与 I wish一样,也用于表示与事实相反的愿望,其后所虚拟语气的时态与wish后所接时态的情况相同。如:

If only she had had more courage! 她再勇敢一些就好了。

If only I had listened to my parents! 我要是当时听了父母的话就好了。

If only she would go with me! 她要是愿意和我一道去就好了!

特别注意 if only 通常独立使用,后面直接跟句子,没有主句(实际上主句省略了)。

3、as if (though) 从句用虚拟语气

▲ 基本用法:以as if (as though) 引导的方式状语从句或表语从句,有时用虚拟语气。

① 若表示与现在事实相反,谓语动词用一般过去时;

② 若表示与过去事实相反,用过去完成时;

③ 表示将来的可能性不大,用would (might, could) 动词原形。如:

He acts as if he knew me. 他显得认识我似的。

They treat me as though I were a stranger. 他们待我如陌生人。

He talks as if he had been abroad. 他说起话来好像曾经出过国。

特别注意 (1) 从句所表示的内容若为事实或可能为事实,也可用陈述语气。如:

It looks as if we’ll be late. 我们似乎要迟到了。

(2) 注意 It isn’t as if…的翻译。如:

It isn’t as if he were poor. 他不像穷的样子(或他又不穷)。

【总结】wish, if only, as if后面的虚拟语气有三种形式:若表示与现在事实相反,谓语动词用一般过去时;若表示与过去事实相反,用过去完成时;表示将来的可能性不大,用would (might, could) 动词原形。

4、It’s (high/about) time后的从句用虚拟语气

▲ 基本用法:从句谓语通常用过去式表示现在或将来,有时也用过去进行时或“should 动词原形 (较少见,且should不能省略)”,其意为“(早)该干某事了”。如:

It’s time we went [were going, should go]. 我们该走了。

【注意1】It’s time I was in bed. 我该上床睡了。(此处不用were,用was表状态;如果表示“是”的意思时用were.)

【注意2】 It’s (high/about) time------“该是------的时候了”,表示将来动作的虚拟语气,用“should 动词原形”,should不可以省略。

5、would rather后句子用虚拟语气

▲ 基本用法:在would rather, would sooner, would just as soon 后的that从句中,谓语动词要用虚拟语气,其意为“宁愿做什么”,具体用法为:

① 一般过去时表示现在或将来的愿望;

I’d rather you went tomorrow (now). 我宁愿你明天(现在)去。

② 用过去完成时表过去的愿望。

I’d rather you hadn’t said it. 我真希望你没有这样说过。

【注意】would rather后的虚拟语气有二种形式。

顺便涉及一下:Only 位于句首的倒装句

Only in this way can you learn English well. 只有这样你才能学好英语。

三、宾语从句中的虚拟语气句型:

9种类型的动词后面的宾语从句用虚拟语气,其后的虚拟语气仅有一种形式:should 动词原形。

表示“坚持要求”后的宾语从句

主要是指insist的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

I insisted that he (should) stay. 我坚持要他留下。

【注意】动词insist后接宾语从句时,除可用虚拟语气外,也可用陈述语气,两者的区别是:若谓语动词所表示的动作尚未发生,或尚未成为事实,意思是“坚持要求”,则用虚拟语气;若谓语动词所表示的动作已经发生,或已经成为事实,意思是“坚持认为”,则要用陈述语气。比较:

He insisted that I had read his letter. 他坚持说我看过他的信。

He insisted that I should read his letter. 他坚持要我看他的信。

表示“命令”后的宾语从句

主要是指order, command的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

He ordered that it (should) be sent back. 他命令把它送回去。

表示“建议”后的宾语从句

主要是指advise, suggest, propose, recommend等的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

He suggested that we should leave early. 他建议我们早点动身。

【注意】与动词insist相似,动词suggest后接宾语从句时,除可用虚拟语气外,也可用陈述语气,两者的区别也是:若谓语动词所表示的情况尚未成为事实,则用虚拟语气,此时suggest通常译为“建议”;若谓语动词所表示的情况为既成事实,则要用陈述语气,此时的suggest通常译为“表明、认为、暗示”。比较:

He suggested that we (should) stay for dinner. 他建议我们留下吃饭。

I suggested that you had a secret understanding with him. 我觉得你与他心照不宣。

表示“要求”后的宾语从句

主要是指ask, demand, require, request等后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

I ask that he leave. 我要求他走开。

He requires that I (should) appear. 他要求我出场。

表示“提议、投票”后的宾语从句

主要是指move, vote等后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

I move that we accept the proposal. 我提议通过这项提案。

表示“敦促”后的宾语从句

主要是指动词urge后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

He urged that they go to Europe. 他敦促他们到欧洲去。

表示“安排”后的宾语从句

主要是指动词arrange后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

He arranged that I should go abroad. 他安排我去国外。

表示“希望、打算”后的宾语从句

主要是指动词desire, intend后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

She desires that he do it. 她希望他做此事。

表示“指示”后的宾语从句

主要是指动词direct后的宾语从句,从句谓语由“should 动词原形”构成,其中的should在美国英语中通常可以省略。如:

The general directed that the prisoners should be set free. 将军指示释放那些俘虏。

四、主语从句中的虚拟语气句型:

以it作形式主语,在“It be adj. that 从句”结构中表示命令、号召、要求、惋惜等感情时,that引导的主语从句用“should 动词原形”的虚拟语气。常见的形容词有:It is necessary, important, strange, natural, advisable, anxious, compulsory, crucial, desirable, eager, essential, fitting, imperative (绝对必要), impossible, improper, obligatory, possible, preferable, probable, recommended, urgent, vital etc.; It is a pity; It is requested/suggested/desired/proposed; It worries me that等。如:

It’s important…类

这一类型主要包括It is (was) important (necessary, desirable, imperative, advisable)that. . .句型。It is impossible that he should go home. 他不可能会回家去。

It’s a pity…类

It is a pity that she should fare so badly. 她竟吃得这么差,真可怜。

It’s desired…类

这种主语从句还常用在It is (was) desired (suggested, settled, proposed, requested, decided, etc. ) that...句型。

It is requested that a vote be taken. 建议付诸表决。

It worries me that…

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/同位语从句中的虚拟语气句型:

在advice, agreement, command, decision, decree, demand, determination, indication, insistence, order, preference, proposal, request, requirement, stipulation, suggestion, idea, plan, order等名词后的表语从句、同位语从句中要用虚拟语气,其后的虚拟语气用“should 动词原形”的结构。如:

Our suggestion is that you(should)be the first to go. 我们的建议是你应该第一个去。

六、 for fear that(以免), in case(以防)引导的目的状语从句中的虚拟语气句型:

在 lest, for fear that(以免), in case(以防)引导的目的状语从句中用结构“should+动词原形”表示虚拟语气,should 可以省略。如:

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。

Keep quiet in case you(should)interrupt him when he is busy. 要保持安静,以防打扰他。

七、让步状语从句中的虚拟语气句型:

(1) 在even if, even though 所引导的让步状语从句中,有时可用虚拟语气,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:

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。

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。

We must respect him no matter what / whatever mistakes he may have made.

不管他犯过什么错误,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.

尽管他是书记,他也必须遵守规定。

八、原因状语从句中的虚拟语气句型:

以be 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。

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,父亲竟知道我昨天所做的事情。

虚拟语气知识体系

if条件句中的虚拟语气

使用虚拟语气的主要句型

谓语动词的虚拟形式

例句

表现在的虚拟条件句

从句:用动词过去(be 多用were)

1. If I were you, I should study English.

2. I would certainly go if I had time.

主句:

would/should/could/might 动词原形

表过去的虚拟条件句

从句:had PP

1. If you had taken my advice, you would not have failed in the test.

2. If I had left a little earlier, I would have caught the train.

主句:would/should/could/might have PP

表将来的虚拟条件句

从句:①用动词过去②should V原③(were to do)

1. If it were to rain tomorrow, the meeting would be put off.

2. If you came tomorrow, we would have the meeting.

主句:would/should/could/might 动词原形

省略if的条件句

从句:用倒装形式,即把were, had等置于句首。(并只限were/ had)

主句:根据虚拟的情况采取与从句相应的形式。

1. Were I in school again(= If I were in school again, I would work harder.)

2. Were it not for the rain, (不能说Weren’t it for the rain, ) I would go swimming.

错综时间条件句(从句与主句所表示时间不一致)

根据从句与主句表示的不同时进行调整。

1. If you had worked hard yesterday, you would be tired now

2. If we hadn’t been working hard in the past few years, things would be going so smoothly.

含蓄条件句(虚拟条件暗含在短语或上下文之中,从句不表现出来)(常见有but for/but that“要不是”, without等)

根据句子表达的实际情况选用相应的虚拟条件句中的主句的动词形式

1. Without air, there would be no living things.

2. I would have given you more help, but I was busy now.

名词性从句中的虚拟语气

wish, “可惜……”“……就好了”,“悔不该……”“但愿……”

wish后从句:与表各种时间的虚拟条件句中的从句动词形式基本相同。

具体:1,表与现在不能实现的愿望,从句用“过去时,be 用were”

2.表与过去不能实现的愿望,从句用“had PP 或 could/would have PP“

3. .表与将来不能实现的愿望,从句用“could/would 动词原形”

1. I wish I were a bird.

2. I wish I had known the answer..

would rather 后的宾语从句

would rather后从句:动词常用过去式表示现在和将来的虚拟语气;用过去完成时表示过去的虚拟语气。

1. I would rather they came tomorrow.

2. I would rather I had finished the job yesterday.

demand, insist, suggest, command, order, require, request, desire等一类动词后的宾语从句

(suggest表“暗示、隐含等”insist表“强调,力言等”不用虚拟语气。)

从句谓语用“should 动词原形”,should可省。

1. I suggest you (should) go at once.

2. He suggested that he patient’s leg should be cut and this suggested that he was not good at the case.(注意两个suggest的准确翻译)

“It is (was) 上述demand/suggest等动词过去分词(或important, natural, strange, necessary等形容词)”后的主语从句

从句谓语用“should 动词原形”,should可省。

1. It ordered that the army (should) get there by 4 a.m.

2. It is necessary that she (should) be sent there at once.

order, suggestion, idea, plan, proposal, advice, demand等名词后的表语从句或同位语从句

从句谓语用“should 动词原形”,should可省。

His demand is that we (should )finish the work in 3 hours.

特殊句式的虚拟语气

as if 引导的从句(表示非真实时)但表真实时,不用虚拟语气。

与虚拟语气条件中从句动词形式基本相同。

1. Tom speaks as if he were a girl.

2. He looks as if he had been to Beijing.

so that, in order that引导的目的状语从句

may/might/should V原

I live so that others may live better.

They got up early in order that they ________ they first train.

A. caught

B. will catch

C. might catch

D. shall catch

It is (the very/high)time that后的定语从句

从句谓语动词常用过去式,有时也可用should 动词原形

It is (high)time that we went (should go) to bed.

It is time that I were leaving.

省去主句的If only (要是……就好了)虚拟条件句

与wish后的宾语从句谓语形式相同。

If only I hadn’t lost the chance!

(= I wish I hadn’t lost the chance)

某些表祝愿的句子

常用原形或“May 动词原形”

Long live world peace!

May you be happy!

表委婉客气的是常语句

情态动词的过去式 动词原形

Could I borrow your bike?

Would you please give me a hand?

,