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虛擬語氣
1. 表示現(xiàn)在/過去/將來情況的虛擬條件句
虛擬條件句主要有三種結(jié)構(gòu):
1) 表示與現(xiàn)在情況相反:主句謂語用“would / could / might +動詞原形”,從句謂語用“動詞的一般過去時”(動詞be的過去式一律用were)。
If I were you, I would not accept his offer.
If I had time, I would certainly go to the cinema with you.
2) 表示與過去情況相反:主句謂語用“would / could / might + have +過去分詞”,從句謂語用過去完成時。
If I had got up a little earlier, I wouldn’t have missed the train.
If I had been more careful, I might have passed that exam.
3) 表示與將來情況相反:主句謂語用“would / could / might +動詞原形”,從句謂語用“were +動詞不定式”或“should +動詞原形”。
If I were to do the job, I would not be able to have enough time to study.
If it should rain tomorrow, I would not go out with you.
2. 虛擬條件句連接詞if的省略
如果虛擬條件句的從句中含有were, had, should, could等詞時,可以省略連接詞if,但這時必須把were, had, should, could等詞移到主語前面,形成倒裝。這種句型主要用于書面形式。
Were I to do the job, I would finish doing it within two weeks.
Had it not been for his help, we couldn’t have arrived there on time.
Should it rain tomorrow, I would stay at home.
3. wish后賓語從句中的謂語構(gòu)成
動詞wish后的賓語從句表示未實現(xiàn)的或不可能實現(xiàn)的愿望,其賓語從句中的謂語動詞要用虛擬語氣,有以下三種構(gòu)成形式。
1) 表示現(xiàn)在不可能實現(xiàn)的愿望,賓語從句中的謂語動詞用一般過去時。(be的過去式為were)。
I wish I had enough money to buy a car.
I wish I were as young and energetic as you.
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