英语中的一种时态，用于描述过去某个时间点或某段时间内正在进行的动作或事件。它由助动词 "was" 或 "were" 加上动词的现在分词形式构成，下面是一些例句来解释过去进行时态的使用。
- I was (not) studying when the phone rang.当电话响起时，我(没有)正在学习。
- They were (not) playing soccer all afternoon yesterday.昨天整个下午他们(没有)一直在踢足球。
- She was (not) cooking dinner while he was (not) watching TV.她(没有)正在做晚饭，他(没有)在看电视。
过去进行时态通常用于强调过去某个特定时间点或时间段内正在进行的动作，与其他过去时态形式（如过去简单时态）一起使用，以提供更详细和准确的描述。
过去进行时态
- 功能：过去某一时刻、时段正发生的动作
- 结构：主语 + was\were + doing
| 现在进行 | 过去进行 |
|---|---|
| 主语 + is/am/are + doing | 主语 + was\were + doing |
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句型转换
| 陈述句 | 否定句 was\were+ not | 疑问句 was\ were 提 前 |
|---|---|---|
| She was doing her homework at 10:00... | She was not doing her homework at 10:00... | Was she doing her …? |
| They were having a date from 7:00- 9:00… | They were not having a date … | Were they having a date from 7:00- 9:00... |
时间状语从句 概念：句子作时间状语。
| 状语 | 状语从句 |
|---|---|
| He was calling his girlfriend at 10:00. | He was calling his girlfriend when he was driving. |
when \ while \ as \ before \ after… 引导词
| when 不限 | 当...时候 | She answered the phone when she was studying. |
|---|---|---|
| while 接延续性动词(多为进行时态） | While I was cooking dinner, the doorbell rang. | |
| as 两个动作紧接着发生 | As the sun set, the sky turned a beautiful shade of orange. | |
| before | 之前 | He finished his work before he went to bed. |
| after | 之后 | She went shopping after she had lunch. |
After 与 Before 的区别
| After | Before |
|---|---|
| He turned off the television after he had seen the programme. | Before he turned off the television, he had seen the programme. |
| He went to bed after he had done his homework. | Before he went to bed, he had done his homework. |
When you think you know nothing,（引导词“When”面的是从句）you begin to know something. （主句是要重点表达的中心思想）当你认为自己一无所知的时候，你开始懂事了。