打印本文 
關(guān)閉窗口 用過去式表示的虛擬語(yǔ)氣
■在虛擬條件句中的運(yùn)用
1. 與現(xiàn)在事實(shí)相反：條件句的謂語(yǔ)動(dòng)詞用一般過去式(be一般用were) ，主句謂語(yǔ)用would /should /could /might +動(dòng)詞原形。如：
If I were you, I would never do that. 如果我是你,我決不做那件事。
If it weren’t for (=But for) your help, I would still be homeless. 若不是你幫忙，我現(xiàn)在還是無(wú)家可歸。
If I had more money, I would buy a car. 我要是有再多一點(diǎn)錢，我就買汽車了。
注：在口語(yǔ)中，在第一、三人稱后，也有人用was。如：
If I was(were) rich, I would buy a car. 我要是有錢，我就買汽車了。
2. 與將來事實(shí)相反：條件句中的謂語(yǔ)可用一般過去式、或者“were to /should＋動(dòng)詞原形”，主句謂語(yǔ)用would /should /could /might +動(dòng)詞原形。如：
If it rained/should rain/were to rain tomorrow, I would not go there. 要是明天下雨，我就不去那里。
3. 與過去事實(shí)相反：條件句的謂語(yǔ)動(dòng)詞用過去完成式，主句謂語(yǔ)用would /should /could /might + have +過去分詞。如：
If he had taken my advice, he might not have made such a bad mistake. 要是他當(dāng)初聽從我的勸告就不會(huì)犯這么嚴(yán)重的錯(cuò)誤了。
If it hadn’t been for Margaret, I might not have understood. 要不是有瑪格麗特，我可能還不明白。
注：若虛擬條件句中有were, should, had時(shí)，可省略if，將were, should, had移至主語(yǔ)前。如：
Were I you, I would never do that.
Should it rain tomorrow, I wouldn’t go there.
Had it not been for Margaret, I might not have understood.
■在錯(cuò)綜時(shí)間虛擬條件句中的運(yùn)用
虛擬條件句與主句謂動(dòng)詞發(fā)生的時(shí)間有時(shí)不一致，要注意主從句謂語(yǔ)動(dòng)詞的形式。如：
If you’d listened to me, you wouldn’t be in such trouble now. 如果你當(dāng)初聽了我的話，你現(xiàn)在也不會(huì)有這樣的麻煩了。
■在含蓄虛擬條件句中的運(yùn)用
有時(shí)只有主句，不出現(xiàn)虛擬條件句，而是用without, with, but for(要不是) 等介詞短語(yǔ)，或者用but, or, otherwise等副詞或連詞，或者用不定式或分詞短語(yǔ)等來表示虛擬條件。如：
But for (=if it had not been for ) your help, I wouldn’t have been successful. 要是沒有你的幫助，我就不會(huì)成功。
I was so busy then, otherwise, I would have helped him. 我當(dāng)時(shí)很忙，要不然，我會(huì)幫助他的。
We couldn’t have finished it without Mary. 如果沒有瑪麗，我們是不能按時(shí)完成這個(gè)工作的。
To hear him talk (=If you could hear him talk…) , you’d think he was Prime Minister. 聽他講話你會(huì)以為他是首相。
Given more time, I could have done it better. 要是多給一點(diǎn)時(shí)間，我會(huì)做得更好。
■在wish, if only, as if, would rather等后的從句中
這些從句的謂語(yǔ)動(dòng)詞的形式是：若與現(xiàn)在或?qū)硎聦?shí)相反，用一般過去式(動(dòng)詞be一律用were) ；若與過去事實(shí)相反，用過去完成式。如(m.52ysedu.com)：
I wish it were spring here all the year round. 但愿這里四季如春。
I wish I hadn’t wasted so much time. 但愿當(dāng)初不該浪費(fèi)這么多時(shí)間就好了。
If only she would go with me! 她要是愿意和我一道去就好了!
If only I had listened to my parents! 我要是聽了我父母的話就好了。
Li Ming speaks English as if he were an American. 李明說英語(yǔ)好像是美國(guó)人。
I would rather he came tomorrow. 我寧愿他明天來。
I’d rather he hadn’t told me about it. 我寧愿他沒告訴我這事。
注：as if/as though引導(dǎo)的從句若是事實(shí)，就不必用虛擬語(yǔ)氣。如：
It looks as if it is going to rain. 看起來要下雨的樣子。
■ as if/as though引導(dǎo)的從句中
He speaks English as though he were an American. 他說英語(yǔ)跟美國(guó)人差不多。
■在It’s time that…的that從句的謂語(yǔ)動(dòng)詞
It is time that we got ready for the final examination. 該是我們?yōu)槠谀┛荚囎鰷?zhǔn)備的時(shí)候了。
打印本文 關(guān)閉窗口