2. If I (you, he / she, we, they) should +动词原形, should / would / could / might + 动词原形
e.g. If he should fail in the experiment this time, he would try again.
3. If I (you, he / she, we, they) + were to +动词原形, should / would / could / might +动词原形
e.g. If we were to panic, we would not be able to help.
二、虚拟语气应该注意的问题
I. 关于假使条件虚拟语气需注意的几点
1. 如果从句所假设的谓语动词发生的时间与主句所假设的谓语动词发生的时间不一致, 这种假设条件句叫错综时间条件虚拟语气. 其主句和从句谓语动词的构成要根据所假设的时间而定.
1) If I had taken the medicine, I would be better now. 如果我服用了那种药的话, 现在就会好些了.
2) If the weather had been finer, the crops would be growing still better. 如果(前些日子)天气更好些, 庄稼一定会长得更好.
2. If it were not for / had not been for 也是一种条件虚拟语气从句, 译为 要不是因为.
1) If it hadnt been for the doctor, he wouldnt have recovered so soon.
2) If it were not for the lack of space, we would hold the sports meet today.
3. 有些条件是由一些短语引出的 (but for, with, without; otherwise, or, but, etc,)
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