二、混合虚拟条件句

　　在虚拟语气中，虚拟条件句与主句所指的时间不一致(如一个是过去的，一个是现在的)，这时主、从句谓语动词的形式需要根据具体的时间来调整，从而构成混合虚拟条件句，即错综时间条件句。该句式中不仅仅存在时间的不同，更重要的是事实和假设的混合，其基本用法如下：

　　1．想象的过去事件可能对现在或将来有影响

句子 时间意义 谓语形式 从句 与过去事实相反 had done 主句 与现在/将来事实相反 would/should/could/might＋动词原形 　　

　　If you had taken his advice then, you would be better now.

　　如果你当时听取了他的建议，你现在会好些。

　　If you hadn't watched TV late last night, you wouldn't be so sleepy now.

　　如果你昨晚看电视不看到那么晚，你现在就不会这么困倦。

　　If I had spoken to him yesterday, I should know what to do now.

　　假如昨天我对他说了，现在我就知道该怎么办了。

　　2．想象的过去事件可能对现在正在进行的动作有影响

句子 时间意义 谓语形式 从句 与过去事实相反 had done 主句 与现在正在进行的事实相反 would/should/could/might＋be doing 　　If I had studied hard, I would be studying in college now.

　　如果我努力学习的话，我现在就在大学里学习了。

　　If he hadn't left for Shanghai, he would be helping me now.

　　如果他不去上海的话，他现在就帮助我了。

　　If you had not given me a lift, I would be walking in the rain now.

　　如果你不让我搭车，我现在还冒雨走着呢。

　　3．想象中的现在状态可能对过去有影响

句子 时间意义 谓语形式