1、·过去进行时的谓语动词构成I / he/ she/ it wasworkingwe/ you/ they wereworking·过去进行时的用法（1）表示过去某一时刻或过去某段时间内正在进行的动作，一般要有表示过去时间的状语。At that time she was working in Oxford.那时，她正在牛津大学工作。It was raining at 6 o'clock this morning.今天早晨六点钟天正下着雨。What were you doing when I phoned you
2、last night?昨晚我给你打电话时你在干什么？常用的时间状语：at 8 o'clock yesterday morning昨天早上8点，at this time last year去年的这个时候，...when I phoned you yesterday昨天我打电话给你的那个时候，...while we were having the meeting我们在开会的时候。在含有时间状语从句的复合句中，延续性动词用过去进行时，非延续性动词用一般过去时。如：They were watching TV when
3、I entered the room.我进入房间时，他们正在看电视。若主句和从句的动词均为延续性动词，则可以两边都可以采用过去进行时。如：The children were playing with their toys while I was eating my dinner.我吃饭的时候，孩子们在玩他们的玩具。·过去进行时的用法（2）可用来表示由过去某时持续到另一时间的过去动作。He was studying in Cambridge between 1999 and 2001.在1999年和2001年那段
4、时间，他在剑桥学习。From January to March I was traveling in Egypt.从3月份到4月份期间，我在埃及旅游。这种时间状语亦可同一般过去时连用，如：He worked from morning till night yesterday.昨天他从早到晚地工作。·过去进行时的用法（3）表示故事发生的背景。It was a sunny morning. Some people were sitting on the riverbank. Some were walking wi
5、th their dogs. Several boys were playing football nearby...一个阳光明媚的清晨。河堤上坐着几个人。有的人在溜狗。不远处有几个男童在踢足球...·过去进行时的用法（4）与某些动词连用时，代替过去将来时。He telephoned me, saying that his aunt was coming to see me soon.他打电话给我，说他姨妈很快就要看我了。这类动词有 come来, go去, leave离开, start开始, stay逗留 等。
6、主语必须是人。·一般过去时与过去进行时的用法比较We built a bridge last winter.去年冬天我们修了一座桥。（全过程，桥已修好）We were building a bridge last winter.去年冬天我们在修一座桥。（片断，修完与否未知）
