2019高考进行备考阶段，考高分教育网小编整理了2019高考英语语法考点聚焦：过去分词虚拟语气(4)，供同学们参考。
2019高考英语语法考点聚焦：过去分词虚拟语气(4)
当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，动词的形式要根据它所表示的时间作相应调整。如：
If they had worked hard, they would be very tired.(从句说的是过去，主句指的是现在)
以下是虚拟语气用于条件状语从句中时，主句和从句谓语动词的形式：
与过去事实相反had + 过去分词should /would/could/might + have + 过去分词
与现在事实相反一般过去时(be用were)would/should/could/might + 动词原形
与将来事实相反一般过去时或should(were to) + 动词原形Would/should/cold/might + 动词原形
有时侯在使用时可省略if,句子则可换成下列形式，即“were / had / should +主语”。如：
Were I a boy, I would join the army.
Had he taken my advice, he would have succeeded.
Were it not for the expense, I would go to Britain.
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