过去进行时
一、定义
1. 表示过去某个时刻正在进行的动作。
He was having breakfast at six o’clock yesterday morning.
2. 表示过去某个时间段正在进行的动作。
He was writing stories the whole morning.
二、结构
1. 肯定结构：主语+was/were +doing+其它.
I was watching TV at eight last night.
He was having breakfast at seven this morning.
2. 否定结构：主语+was/were +not +doing+其它. I was not watching TV at eight last night.
He was not having breakfast at seven this morning.
3. 一般疑问句：Was/Were+主语+doing+其它?
(1)Were you watching TV at eight last night?
Yes, I was. / No, I wasn’t.
(2)Was he having breakfast at seven this morning? Yes, he was. / No, he wasn’t.
4. 特殊疑问句：疑问词+was/were+主语+doing+其它？
三、时间标志词
1. at+具体时刻+过去时间(at five last Saturday)
2. at this time+过去时间(at this time yesterday)
3. 过去时间段(from nine to ten last evening)
4. at that time/moment
5. when &while引导的过去时间状语从句
四、现在分词复习
动词 ing 的基本变化规则
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