过去进行时

一、知识点 核心概念

过去进行时表示过去某一时刻或某一段时间正在发生的动作，结构是 was / were + doing。

二、知识点讲解（分步骤）

1. 找过去时间点：at 8 yesterday、then、at that time。
2. 判断主语单复数，选择 was 或 were。
3. 动词变现在分词 doing。
4. 常和 when / while 引导的时间状语从句连用。

三、图解 / 示例

I was doing homework at 8 last night.
They were playing football then.
When the phone rang, I was reading.
While I was reading, my mother was cooking.

四、易错点 / 陷阱

• 过去进行时不是一般过去时，强调“当时正在做”。
• when 后常接短动作，while 后常接持续动作。
• was / were 不能漏。

五、公式 / 规则总结

肯定句：主语 + was/were + doing + 其他。
否定句：主语 + was/were not + doing + 其他。
疑问句：Was/Were + 主语 + doing + 其他？

六、练习题（基础题， 提高题， 拔高题）

基础题：填空。

1. He ___ (watch) TV at 9 yesterday.
2. They ___ (run) at that time.

提高题：选择 when / while。

1. I was sleeping ___ the doorbell rang.

拔高题：翻译句子。

1. 昨晚八点我正在读书。

答案：

1. was watching
2. were running
3. when
4. I was reading at eight last night.

七、拓展 / 关联知识

• 和一般过去时对比：I read a book yesterday. / I was reading at 8 yesterday.
• 在叙事写作中可用过去进行时交代背景。