(1) 当条件从句与结果主句所表示的时间不一致（如一个是过去发生的，一个是现在发生的）时，虚拟语气的形式应作相应的调整。如：

If you were in better health, we would have asked you to come.

如果你身体好一些，我们早就请你来了。

If we had consulted him on the question yesterday, we should know what to do now.

假如昨天我们向他请教了这个问题，现在就知道该怎么办了。

You would be much better now if you had taken my advice. 假如你接受了我的意见，你现在就会好得多。

(2) 虚拟式were也可表与过去事实相反。如：

If I were not busy, I would have come.

假如我不忙，我就会去的。（were表过去）