英语语法：过去进行时-表示过去某一时刻正在进行的动作

上几期学习了：英语语法：一般过去时-表示主语过去的状态或者特征、一般过去时-在时间和条件状语从句中代替过去将来时。本期学习英语语法：过去进行时-表示过去某一时刻正在进行的动作。

1. 动词形式

	have	do
动词 形式	was  having were  having	was  working were  working

2.过去进行时的用法

(2)表示过去某一时刻正在进行的动作。比如：

He was doing shopping this time yesterday.

昨天这个时候他正在购物。

I was leaving for work when he came to see me.

他来看我时，我正要离开去上班。

We were having a discussion at that time.

那时我们正在讨论。

What were you doing at nine last night？

昨晚九点时，你在做什么？

I was doing my homework at this time yesterday.

昨天的这个时候我正在做作业。

I was cooking when she knocked at the door.

她敲门时我正在做饭。

What were you doing at 7 p.m.yesterday?

昨天晚上七点你在干什么?

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