虚拟语气知识
虚拟语气知识
Written by Zhang Yingchun
注：文中带★的内容仅供了解, 不必作为重点掌握。
（一）虚拟语气在条件句中的形式：
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If 从句
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主句
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过去
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had + done
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would/should/could/might + have done
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现在
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过去式(be用were)
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would/should/could/might +动词原形
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将来
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过去式(be用were)
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would/should/could/might +动词原形
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were to + 原形
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should + 原形
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（二）条件状语从句中虚拟语气的特殊用法：
1 . 虚拟语气条件状语从句的倒装问题：
if从句中有助动词were /should /had时,可省略if, 将were /should /had 提前, 变成倒装句。
e.g. 1) Were I you , I would give an AIDS patient a hug .
2) Had you come earlier , you could have seen Tom .
3) Should it snow hard tomorrow , I would stay at home .
如果从句是否定句, 倒装时不可将not 提前。
e.g. 4) If he should not come tomorrow , what would we do ?
→ Should he not come tomorrow , …
5) If I hadn’t taken his advice , I might have failed in the experiment .
→ Had I not taken his advice , …
2 . If it were not for / If it had not been for 表示 “ 要不是有 … ”,从句也可以倒装。
1) If it were not for the fact that he can’t sing , we would invite him to attend the party .
→ Were it not for the fact that he can’t sing , …
2) If it had not been for her good care , I wouldn’t have got well so soon .
→ Had it not been for her good care , …
3 . should用在if 从句中意为“万一”,主句除用虚拟语气外, 还可用祈使语气和陈述语气
e.g. 1) What would happen if the earth should stop moving ?
2) Should she fail to come , please ask Jack to take her place .
3) Don’t be silly . Should you die from the accident , we’ll feel very sad .
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