文档介绍：过去进行时
概念：过去进行时（Past continuous tense或Past Progressive tense）表示在过去某一时刻或某一段时间内进行或发生的动作。不强调是否完成。
结构：主语+was /were + V-ing+...。
常与表示过去的时间状语连用，如：last night, last Saturday等；或者与when,while,as引导的过去时间状语连用。
Eg:We were watching TV from seven to nine last night.
When I saw him he was decorating his room.
肯定句:主语+was/were+doing+其它
否定句:主语+was/were+not+doing+其它
一般疑问句:Was/Were+主语+doing+其它
答语：Yes,主语 was/,主语 wasn't/weren’t.
特殊疑问句:特殊疑问词+一般疑问句+其它
Eg: We were having supper when the phone rang.
This time yesterday Jack was not watching TV. He was repairing his bike.
Were you playing basketball at four yesterday afternoon?
过去进行时的基本用法：
（1）. 表示过去某一时间正在进行的动作。此时句中往往有表示过去的时间状语at that moment/ time, this time yesterday, at nine o’clock last night...或者与when，while，as引导的过去的时间状语从句连用。
eg：He fell asleep when he was reading.
What were you doing this time yesterday?
(2)表示一个过去的动作发生，另一个过去的动作正在进行。也可以表示过去一段时间内持续发生的动作。
Eg： I was watering the flowers when suddenly it began to rain.
We were expecting you yesterday.
(3)表示两个过去的动作同时进行，这时可用while连用。
Eg：while we are having breakfast, John was talking on the phone.
I was doing my homework, while my mother was cooking.
(4).表示感情色彩与现在进行时相似，过去进行时也可表示满意、称赞、惊讶、厌恶等感情色彩，也通常与 always,forever,continually等副词连用。
eg：They were always quarrelling.
(5) 表示按计划、安排过去将要发生的事。用于come,go,leave,start,a