過去將來時的用法
過去將來時，一般用于主句為過去時的`賓語從句中。如：
He said he would stay with us. 他說他要與我們呆在一起。
He said he would never go there again. 他說他絕不會再去那兒。
過去將來時，用于虛擬語氣中，如：
If I were you, I would not do that. 要是我是你的話，我就不會那樣做。
If he were here, he would show us how to do it. 如果他在這兒，他就會向我們展示該如何做了。