标志：would + 动词原形

1. 表示从过去某一时间来看将要发生的动作或存在的状态，一般用于主句为过去时的宾语从句中。如：

He said he would come here next Friday.

I knew that he would help us when we were in trouble.

2. 表示过去的动作习惯或倾向：

The old man would sit on a bench in the quite park for hours without doing anything.

When I worked on that farm, I would get up at 5 am.

3. 用于虚拟语气中：

If I were you, I would not do that.

If he were here, he would show us how to do it.

4. 过去将来时的其他形式

1)  was / were going to + 动词原形。如：

He told us that he was going to attend the meeting.

She said that I was going to be sent to meet her at the railway station.

2) was / were to + 动词原形。如：

The building was to be completed next month.

Li Lei was to arrive soon.

3)  was / were about to + 动词原形。如：

We were about to leave there when it began to rain heavily and suddenly.

He was about to have lunch when the bell rang.