英语语法：过去进行时-表示过去某一阶段正在进行的动作

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、过去进行时-表示过去某一时刻正在进行的动作。本期学习英语语法：过去进行时-表示过去某一阶段正在进行的动作。

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)表示过去某一阶段正在进行的动作。比如：

Peter and Sam were playing chess the whole afternoon yesterday.

彼得和山姆昨天一下午在下棋。

We were having a meeting from nine to eleven yesterday.

我们昨天从九点到十一点在开会。

They were swimming in the lake the whole morning yesterday.

他们昨天一上午在湖里游泳。

I was visiting a friend of mine most of the afternoon.

我昨天下午大部分时间，都在一个朋友家里。

What were you doing during the holiday?

这个假期你都在做什么?

We were watching TV from seven to nine last night.

昨天晚上七点到九点的时候我们在看电视。

What was he researching all day last Sunday?

上周日他一整天都在研究什么？

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