My brother fell while he was riding his bicycle and hurt himself. 我哥哥骑自行车的时候从车上摔下来，受伤了。
(4)It was raining when they left the station. 他们离开车站的时候天正在下雨。
(5)When I got to the top of the mountain, the sun was shining. 当我到达山顶的时候，阳光灿烂。
2. 过去进行时可以表示在过去某个时间点发生的事情。时间点可以用介词短语、副词或从句来表示。如：
What was she doing at nine o'clock yesterday?昨天晚上九点她在做什么? (介词短语表示时间点)
When I saw him he was decorating his room.当我看见他的时候他正在装饰房间。 (when从句表示时间点)
3. 在复合句中，如果主要动作和背景动作都是延续的或同时发生的，那么主从句的动词都可用过去进行时。例如：
While he was waiting for the bus, he was reading a newspaper. 他边等车边看报。 (两个动作都是延续的)
He was cleaning his car while I was cooking. 他擦车时我在做饭。(两个动作同时进行)
4、表示在过去即将发生的动作。如：
She asked him whether he was coming back for supper.
5、表示过去的反复性或习惯性的动作，常与副词always,constantly,continually,frequently等连用，常常带有说话人的某种感情色彩。如：
His mother was always working like that.他目前总是那样工作。
199,0624,2540
(4)It was raining when they left the station. 他们离开车站的时候天正在下雨。
(5)When I got to the top of the mountain, the sun was shining. 当我到达山顶的时候，阳光灿烂。
2. 过去进行时可以表示在过去某个时间点发生的事情。时间点可以用介词短语、副词或从句来表示。如：
What was she doing at nine o'clock yesterday?昨天晚上九点她在做什么? (介词短语表示时间点)
When I saw him he was decorating his room.当我看见他的时候他正在装饰房间。 (when从句表示时间点)
3. 在复合句中，如果主要动作和背景动作都是延续的或同时发生的，那么主从句的动词都可用过去进行时。例如：
While he was waiting for the bus, he was reading a newspaper. 他边等车边看报。 (两个动作都是延续的)
He was cleaning his car while I was cooking. 他擦车时我在做饭。(两个动作同时进行)
4、表示在过去即将发生的动作。如：
She asked him whether he was coming back for supper.
5、表示过去的反复性或习惯性的动作，常与副词always,constantly,continually,frequently等连用，常常带有说话人的某种感情色彩。如：
His mother was always working like that.他目前总是那样工作。
199,0624,2540
