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
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?
一、选择填空。

1. She ___ to her university when a police car drove up beside her and made her stop.
A. had driven
B. was driving
C. has driven
D. drove
2. The schoolmaster ___badly behaved classes before he knew what to do with those problem students.
A. has experienced
B. was experiencing
C. would experience
D. had experienced
参考答案:
1-2: BD
二、分析句子的语法结构，并译成中文。

1. he schoolmaster had experienced badly behaved classes before he knew what to do with those problem students.
2. I know he’s baiting us to respond. I’m taking the bait in hopes that rational folks
realize this is wrong and dangerous.【Newsweek】。