【过去进行时讲解和练习】在英语语法中，过去进行时是一个非常常见的时态，用于描述在过去某一特定时间或时间段内正在进行的动作。掌握这一时态不仅有助于提高语言表达的准确性，还能让我们的叙述更加生动、具体。
一、过去进行时的结构
过去进行时由 “was/were + 动词的现在分词（-ing 形式）” 构成。具体结构如下：
- 肯定句：主语 + was/were + 动词-ing
- 例句：I was watching TV at 8 p.m. yesterday.
- 例句：They were playing football when it started to rain.
- 否定句：主语 + was/were + not + 动词-ing
- 例句：She wasn’t studying when I called her.
- 例句：We weren’t eating dinner at the time.
- 疑问句：Was/Were + 主语 + 动词-ing？
- 例句：Were you waiting for me?
- 例句：Was he walking to school?
二、过去进行时的用法
1. 表示过去某一时刻正在发生的事情
- 例句：At 10 o’clock last night, I was reading a book.
- 例句：They were having lunch when the phone rang.
2. 与一般过去时连用，表示两个动作同时发生
- 例句：While I was cooking, my brother was doing his homework.
- 例句：She was talking on the phone when the doorbell rang.
3. 描述过去的背景或情景
- 例句：It was raining heavily when we arrived.
- 例句：The children were laughing and playing in the park.
三、过去进行时的常见时间状语
使用过去进行时常伴随一些表示过去的时间状语，如：
- at this time yesterday
- at 8 o’clock last night
- while I was studying
- when the phone rang
- during the meeting
- from 9 to 11 last night
四、过去进行时与一般过去时的区别
| 时态 | 结构 | 用法 |
|------|------|------|
| 过去进行时 | was/were + -ing | 强调动作正在进行 |
| 一般过去时 | 动词过去式 | 表示一个完整的动作或状态 |
- 例句对比：
- I was writing a letter when she called.（我写信时她打了电话）
- I wrote a letter after she called.（她打电话后我写了封信）
五、练习题
一、选择正确的动词形式填空
1. At 7 p.m. yesterday, I ______ (watch) a movie.
2. They ______ (play) basketball when the storm began.
3. My mother ______ (cook) dinner when I got home.
4. Was your sister ______ (do) her homework?
5. We ______ (not talk) when the teacher came in.
二、改写句子
1. She cooked dinner. → She was cooking dinner when the guests arrived.
2. They were playing soccer. → They were playing soccer at 5 p.m. yesterday.
3. He called me. → He called me while I was working.
三、翻译句子
1. 昨天这个时候我在做作业。
→ I was doing my homework at this time yesterday.
2. 当我到家时，他们正在吃饭。
→ They were having dinner when I got home.
3. 他那时没有在睡觉。
→ He wasn’t sleeping at that time.
六、小结
过去进行时是英语学习中的重要知识点，它帮助我们更准确地描述过去某个时间点或时间段内正在进行的动作。通过多加练习，结合实际语境，可以更好地掌握这一时态的使用方法。希望这篇讲解能帮助你更好地理解并运用过去进行时！
