if条件句虚拟语气
if条件虚拟语气如下:
1、现在时:当if引导的虚拟语气表示与现在事实相反时,主句谓语用could、would、shoul d或mi ght加动词原形,条件从句中的谓语用过去式。
2、过去时:当if引导的虚拟语气表示与过去事实相反时,主句谓语用could、would、shoul d或mi ght加have再加动词原形,
3、将来时:当if引导的虚拟语气表示与将来事实相反时,主句谓语用could、would、shoul d或mi ght加动词原形,条件从句中的谓语用过去式。
虚拟语气中,表条件的状语从句的if可以省略,但主语必须与动词易位(也就是倒装):
If it were not for his illness, he could do better.
=Were it not for his illness, he could do better.
如果不是因为他生病,他可以做得更好。
If he had money, he would buy that villa.
= Had he money, he would buy that villa.
对将来情况的虚拟:
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。
对现在情况的虚拟:
主句:主语+would/should/might/could+动词原形
从句:动词过去式
对过去情况的虚拟:
主句:主语+would/should/might/could have+动词过去分词
从句:had+动词过去分词
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