IF虚拟语气的三种时态是什么?

发布网友 发布时间:2022-04-23 11:16

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热心网友 时间:2023-09-12 19:16

1、提出将来会发生的事:主句:主语+would/should/might/could+动词原形;

从句:should+动词原形/were to+动词原形;

2、提出现在的条件: 主句:主语+would/should/might/could+动词原形;

从句:动词过去式;

例句:If he studied at this school, he would know the enviornment around the school very much.

3、提出过去的未发生的条件:主句:主语+would/should/might/could have+动词过去分词

从句:had+动词过去分词

例句: If I had read the book, I would have told you about it.

扩展资料

if的用法

if作为从属连词,可引导条件状语从句、让步状语从句和名词从句。

if引导条件状语从句,从句可为真实条件从句,也可为虚拟条件从句。如为真实条件从句,谓语用陈述语气,表示可能性很大,作“假使”“如果”解,通常用一般现在时代替一般将来时; 如果if从句中用will,表示意愿。

从句如为虚拟条件从句,谓语动词要用虚拟语气,表示可能性不大或与过去事实相反,作“要是,假如”解。可指过去的情况,也可指现在和将来的情况。指将来情况时可用were to或should。在现代口语中,一、三人称后常用was代替were。if引导的虚拟条件句中,助动词were,should,had可以移至主语前,此时if可省略。

if引导的条件从句中可以省略be和主语。

if引导的条件从句,有时后接only以加强其语气,表示说话人非常盼望某人提出的条件能够实现。

if可引导让步状语从句,作“虽然,即使”解,常和even连用。

if可引导名词性从句,作“是否”解,常放在ask, doubt, know, learn, see, wonder等动词后。一般用在口语中,而且不能用于句首。

热心网友 时间:2023-09-12 19:17

1、提出将来会发生的事:

主句:主语+would/should/might/could+动词原形

从句:should+动词原形/were to+动词原形

If he should go to Harvard University, he would make full use of his time.

如果他要上哈佛大学的话,他就会充分利用他的时间了。

2、提出现在的条件: 

主句:主语+would/should/might/could+动词原形

从句:动词过去式

If he studied at this school, he would know the enviornment around the school very much.

如果他在这所学校学习的话,他会很了解周边环境。

3、提出过去的未发生的条件:

主句:主语+would/should/might/could have+动词过去分词

从句:had+动词过去分词

If I had read the book, I would have told you about it.

我如果看过本书,我会把内容告诉你了。

扩展资料

虚拟语气用法:

1、用在含蓄条件句中

句子中,假设的情况不用条件从句表示出来,而是用一个介词短语来表示,句子的谓语形式也可遵循上表的规则。

这种用法也常见于or, or else, otherwise和but后面的分句中。

例如:Without music, the world would be a ll place.

2、用在错综时间条件句中

有时候,条件从句表示的动作和主句表示的动作发生的时间并不一致,这时,谓语动词的形式要根据表示的时间来调整,这种句子可称作错综时间条件句。例如:

If you hadn’t watched television so late, you wouldn’t be so sleepy now.

此句为时间交错的虚拟条件句,从句表示与过去事实相反的假设,主句则假设与现在情况相反

3、用在wish后的宾语从句中

这种句子主要表示愿望,that常省略。若指现在或将来的愿望,从句用过去时;若指过去没有实现的愿望,从句用过去完成时。

例如:I wish I had learned to play chess.(与过去事实相反)

若wish 后的宾语从句中用would,可以表示请求,通常意味着说话人的不快或不满。

例如:I wish you would help us.

4、用在if only感叹句中

当表示“但愿”,“要是…就好”时,它的用法和wish基本相同,只是更富有感*彩,表示一时很难实现的愿望。

例如:If only I knew what you wanted.

5、用在以as if (as though) 引出的方式状语从句中

当表示过去想象中的动作或情况时,用过去完成时;当表示和现在事实相反或对现在情况有所怀疑时,用一般过去时。

例如:The old couple loved the orphan girl as if she had been their daughter.

6、用在某些虚拟的定语从句中

He was the very person I should have been wished to see.

7、用以表示说话人的主观愿望或选择,仅用在一些惯用句型的从句中

I’d rather they came tomorrow.

但had rather, would rather, would just as soon, would sooner等惯用语如用在简单句中,其后都用不加to的动词不定式。

例如:I’d rather die than give up my principle.

热心网友 时间:2023-09-12 19:17

1、提出将来会发生的事:主句:主语+would/should/might/could+动词原形;

从句:should+动词原形/were to+动词原形;

2、提出现在的条件: 主句:主语+would/should/might/could+动词原形;

从句:动词过去式;

例句:If he studied at this school, he would know the enviornment around the school very much.

3、提出过去的未发生的条件:主句:主语+would/should/might/could have+动词过去分词

从句:had+动词过去分词

例句: If I had read the book, I would have told you about it.

扩展资料:

与现在事实相反:If I were you, I would go there tomorrow.

与现在事实相反:If he came to the party, I wouldn't come.

与过去事实相反:If she had been there, she would have met Jack.

与将来事实相反:If it were to rain tomorrow, they couldn't go for an outing.

与将来事实相反:If they should attend the meeting, we might get more support from them.

参考资料来源:百度百科-虚拟语气

热心网友 时间:2023-09-12 19:18

1、表示与现在事实相反的情况

从句:If+主语+动词一般过去时(Be动词用were)主句:主语+ should/would/might/could+do: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、表示与过去事实相反的情况

从句:If+主语+had+done主句:主语+should/would/might/could+have done:If I had got there earlier,I should/would have met her.如果我早到那儿,我就会见到她。(事实:去晚了)

3、表示与将来事实相反

从句:①if+主语+were to do

②if+主语+should+do

③if+主语+动词一般过去式(be动词用were)主句:主语+should/would/might/could+do: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,不可能)

热心网友 时间:2023-09-12 19:18

if虚拟语气的三种时态

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