P5 虚拟语气

目录


参考链接
“虚拟语气”的知识点归纳梳理
虚拟语气

主要形式

条件句 主句 例句
与现在相反 If + 主语 + 动词过去式(be动词用were) 主语 + s/w/c/m + 动词原形 If I were you, I would give this video a thumbs-up.
与过去相反 If + 主语 + had + 过去分词 主语 + s/w/c/m have + 过去分词 If I had seen the rabbit a few days ago, I would bite him.
与将来相反 If + 主语 +动词过去式(be动词用were) 主语 + s/w/c/m + 动词原形 If there were a heavy snow next Sunday,we would go skating.
If + 主语 + should + 动词原形 主语 + s/w/c/m + 动词原形 If he should come here tomorrow,I would talk to him.
If + 主语 + were to + 动词原形 主语 + s/w/c/m + 动词原形 If she were to be here next Monday,I would tell her about the matter.

其中,s/w/c/m = should/would/could/might,should/would/could/might 分别是 shall/will/can/may 的过去式。
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(见下一小节)。
  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

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:

  1. 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)
  2. 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:

  1. 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。
  2. 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:

  1. 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。
  2. But for his help, we would be working now. 要不是他的帮助,我们还会在工作呢。
  3. But that I saw it, I wouldn't have believed it. 要不是我亲眼目睹,我还不信呢。
  4. 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 something,but that 后接从句。

两个常考if虚拟语气句型。
这两个句型是If it weren't for…和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:

  1. If it weren't for water, no plant could grow. 要是没有水,植物就无法生长。
  2. If it hadn't been for your assistance, we wouldn't have succeeded. 要是没有你的协助,我们不可能成功。
    = But for your assistance, we wouldn't have succeeded.
    = Without your assistance, we wouldn't have succeeded.

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 (as 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。

  4. 若表示与现在事实相反,谓语动词用一般过去时;
    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。

  5. 若表示与过去事实相反,用过去完成时;
    He talks as if he had been abroad. 他说起话来好像曾经出过国。

  6. 表示将来的可能性不大,用 would (might, could) + 动词原形。

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。

  1. 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。

  2. 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:

  3. 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。

  4. 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。

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。

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。

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。

让步状语从句中的虚拟语气句型

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。

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。

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。
    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。

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

名词性从句中的虚拟语气

特殊句式的虚拟语气

if的省略及虚拟的倒装

当虚拟条件句中含有 were,had 或 should 时,可以把这些词提至句首(主语前),同时省略 if,以强调假设条件的虚拟性或突出说话人的主观意愿
eg:

  1. Should he (=If he should) agree to go there, we would send him there. 要是他答应去的话,我们就派他去。
  2. Were she (=If she were) here, she would agree with us. 如果她在这儿的话,她会同意我们的。
  3. Had he (=If he had) 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。
posted @ 2023-11-11 00:58  weigy  阅读(470)  评论(0编辑  收藏  举报