虚拟语气的使用?

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虚拟语气的使用?

虚拟语气的使用?
虚拟语气的使用?

虚拟语气的使用?
一、与现在事实相反
若与现在事实相反,虚拟语气的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”.如:
If you took a taxi,you'd get there quicker.如果你坐出租车去,你可以快一点到那里.(但你不坐)
If I knew her number I could ring her up.要是我知道她的电话号码,我就可以给她打电话了.(可惜我不知道)
二、与过去事实相反
若与过去事实相反,虚拟语气的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”.如:
If I'd left sooner,I'd have been on time.要是我早点动身,我就准时到了.(但我动身太迟了)
If we had found him earlier we could have saved his life.要是我们当时早点找到他的话,我们就可以救活他.(可惜我们找到他太晚了)
三、与将来事实相反
若与将来事实相反,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”.如:
If he went,would you go too?如果他去,你也去吗?(大概他不会去)
If I asked him,I'm sure he'd help us.如果我向他提出要求,肯定他会帮助我们.(不过我不打算这样做)
注意与说明:对于与将来事实相反的情形,请注意以下几点:
一是这里说的与将来事实相反,实为对将来情况的推测;
二是此用法中的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);
三是当条件从句使用“should+动词原形”这样的谓语时,主句谓语除可用“should (would,could,might)+动词原形”这样的虚拟语气外,也可用陈述语气或祈使语气.如:
I should see him,I'll tell him.万一我见到他,我就告诉他.
If it should rain tomorrow,don’t expect me.万一明天下雨,就别等我了.

虚拟语气是一个比较困难的语法问题。然而只要我们好好总结一下虚拟语气的构成和用法,那就可以化难为易了。现将虚拟语气有关用法归纳如下:
    1.虚拟语气在条件句中的用法
        (1)若表示与现在事实相反的假设,则条件从句中用过去式,主句中用过去将来式(would,should,could,might + 动词原形);若表示某事将来实现的可能性不大,则条件从句中用shoul...

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虚拟语气是一个比较困难的语法问题。然而只要我们好好总结一下虚拟语气的构成和用法,那就可以化难为易了。现将虚拟语气有关用法归纳如下:
    1.虚拟语气在条件句中的用法
        (1)若表示与现在事实相反的假设,则条件从句中用过去式,主句中用过去将来式(would,should,could,might + 动词原形);若表示某事将来实现的可能性不大,则条件从句中用should + 动词原形也可用“were to+动词原形”或用过去式动词。如:
            I would certainly go if I had time.(现在)
            If it should rain,we wouldn”t go out.(将来)
            If I knew German,I would read the paper to you.(现在)
            If he were here,we could ask him.(现在)
        (2)若表示与过去事实相反的假设,从句中用过去完成式,主句中用过去将来完成式(should,would,could,might + have + 过去分词)。如:
            If I had set off a little earlier, I would have caught the train.
            She would / might have come if she hadn”t been so busy.
            If I hadn”t taken your advice,I would have made a bad mistake.
            If only you hadn”t told him the news.
        (3)含有虚拟语气的条件状语从句中,如有had,should,were 这三个词的话,在正式或书面语言中可将if省略,再将句子的主语和谓语动词实行全部倒装或部分倒装。如:
            Had they time(=If they had time),they would certainly come and help us.
            Should it be fine(=If it should be fine),we would go for an outing.
            Were I go(=If I were you), I would go.
        (4)若主句从句所指的时间不一致,即条件从句表示与过去事实相反,主句表示与现在事实相反;或者条件从句表示与现在事实相反,主句表真实情况,则从句中应采用与具体时间相对应的虚拟形式。如:
            If it had rained last night(过去),It would be very cold today(现在).
            If I had taken your advice(过去),I should have no trouble with the work now(现在).
    2.虚拟语气在宾语从句中的用法
        在动词suggest,order,demand,propose,request,command,insist等后的宾语从句中,用虚拟语气(即Should+动词原形或只用动词原形)来表示愿望、建议、命令、请求等。在动词wish /would rather后的宾语从句中,用过去式表示与现在事实不符,用过去完成式表示与过去事实不符。如:
            I suggest that we(should)set off at once.
            The doctor insisted that the patient (should)be X-rayed.
            I wish I were as strong as you.
            I would rather that you hadn”t told him.
        

3.虚拟语气在主语从句中的用法
        在It is necessary/important/strange/natural;It is requested/suggested/desired/proposed;it is a pity等结构后的主语从句中要用虚拟语气,即Should+动词原形或只用动词原形。如:
            It is necessary that he(should)be sent there at once.
            It is requested that Professor Li(should)give us a speech.
            It is desired that we(should)get everything ready by tonight.
    4.虚拟语气在表语从句、同位语从句中的用法。
        在 suggestion, proposal,idea,plan,order,advice等名词后的表语从句、同位语从句中要用虚拟语气,即should+动词原形或只用动词原形。如:
            Our suggestion is that you( should)be the first to go.
            My advice is that we(should)send for Doctor Li.
            Do you know the order that you(should)keep watch?
5.虚拟语气在其他状语从句中的用法
        在as if引导的状语从句中,用过去式表示与现在事实不符,用过去完成式表示与过去事实不符;在so that,in order that引导的状语从句中,常用should/would/could/might+动词原形来表示虚拟语气。如:
            They talked as if they had been friends for years.
            She stayed at home for a few days so that she could take care of her mother.
            He took a taxi to the station so that she should not miss the train.
    6.虚拟语气在定语从句中的用法:
        在it is time后面的定语从句中常用过去式表示虚拟。

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