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高考英語(yǔ)語(yǔ)法的試題講解:虛擬語(yǔ)氣if倒裝句

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  省略連詞if 采用倒裝的非真實(shí)條件句

  在書面語(yǔ)中,條件從句可以不用連詞if, 而將謂語(yǔ)中的過(guò)去式were,had或should等移至主語(yǔ)之前,構(gòu)成倒裝。

  例:Were you in my position, you would do the same.

  假如你處在我的地位,你也會(huì)這樣干的。

  例:Had he come earlier, he would have met her.

  要是他早點(diǎn)來(lái)的話,他就會(huì)見到她了。

  虛擬語(yǔ)氣在儲(chǔ)蓄條件句中的應(yīng)用

  非真實(shí)條件句中的條件從句有時(shí)不表示出來(lái),只暗含在短語(yǔ)或上下文中,這種句子叫做儲(chǔ)蓄條件句。常見的有but,for ,without等引導(dǎo)的短語(yǔ),以及or, or else, otherwise, but 等后面的分句。

  例:But for your help we couldn’t have succeeded in the experiment.

  如果沒(méi)有你的幫助,我們的實(shí)驗(yàn)室是不會(huì)成功的。

  例:We could have done better under more favourable conditions.

  在更有利的條件下,我們能夠做得更好些。

  經(jīng)典考點(diǎn):

  1、____right now, she would get there on Sunday.

  A)Would she leave

  B)If she leaves

  C)Were she to leave

  D)If she had left

  2、____for my illness I would have lent him a helping hand.

  A)Not being

  B)Had it not been

  C)Without being

  D)Not having been

  3、We didn’t know his telephone number, otherwise we ____him.

  A)would have telephoned

  B)must have telephoned

  C)would telephone

  D)had telephoned

  4、A safety analysis____the target as a potential dandger Unfortunately, it was never done.

  A)would identify

  B)will identify

  C)would have identified

  D)will have identified

  解析:

  1、答案選C.從句子結(jié)構(gòu)可知,本題是表示與將來(lái)事實(shí)相反的虛擬語(yǔ)氣。主句的謂語(yǔ)是“should+動(dòng)詞原形”。同時(shí),從句省略了連詞if, 可以將were提前,構(gòu)成倒裝。只以C符合語(yǔ)法規(guī)則。本題意思:如果她馬上動(dòng)身的話,她可能在星期天到達(dá)那里。

  2、選B.從句子結(jié)構(gòu)可知,空缺處應(yīng)填入表示與過(guò)去事實(shí)相反的虛擬條件從句,并且將連詞if 省略。此時(shí)應(yīng)把虛擬語(yǔ)氣的謂語(yǔ)動(dòng)詞提前。符合語(yǔ)法規(guī)則的只有B項(xiàng)。

  3、選A.本題中otherwise引出的是一種與事實(shí)相反的假設(shè)條件,后面的句子應(yīng)用虛擬語(yǔ)氣。前一分句暗示了一個(gè)過(guò)去的時(shí)間,所以用不著would have done的形式,相當(dāng)于If we had known his telephone number, we would have telephoned him.

  4、選C.根據(jù)unfortunately后面直接陳述一個(gè)過(guò)去的事實(shí),可以推斷出第一個(gè)句子里含有一種“應(yīng)該做某事而沒(méi)有做的”虛擬條件。C項(xiàng)用于表示與過(guò)去事實(shí)相反的虛擬語(yǔ)氣,正合題意。B、D不是虛擬語(yǔ)氣。

  (責(zé)任編輯:郭峰)

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