在英语中,"when" 引导的时间状语从句通常用来表示时间,即“当……的时候”。这类从句通常用于描述事件发生的时间顺序,或者在某个时间点发生的事情。
一、基本结构:
主句 + when + 从句
- 主句:I saw him.
- 从句:when he was walking home.
二、常见用法:
-
表示“当……的时候”
- 例如:
- I heard the news when I was walking home.
(当我回家走路的时候,我听了这个新闻。)
- I heard the news when I was walking home.
- 例如:
-
表示“在……的时候”
- 例如:
- The meeting was held when the weather was good.
(当天气好的时候,会议举行了。)
- The meeting was held when the weather was good.
- 例如:
-
表示“当……发生时”
- 例如:
- She called me when she saw the news.
(她看到新闻的时候,给她打电话。)
- She called me when she saw the news.
- 例如:
-
表示“在……之后”
- 例如:
- He left when the train had left.
(当火车已经离开了的时候,他离开了。)
- He left when the train had left.
- 例如:
三、注意事项:
- when 引导的从句中,主语和动词要与主句一致。
- when 通常不能引导宾语从句,但可以引导定语从句(如:the day when I was born)。
- when 有时也可以引导状语从句,表示“当……的时候”。
四、例句练习:
-
I saw him when he was walking home.
(当我回家走路的时候,我看到了他。) -
The meeting was held when the weather was good.
(当天气好的时候,会议举行了。) -
She called me when she saw the news.
(她看到新闻的时候,给她打电话。) -
He left when the train had left.
(当火车已经离开了的时候,他离开了。)
五、总结:
| 用法 | 例句 | 说明 |
|---|---|---|
| 表示“当……的时候” | I saw him when he was walking home. | 主句和从句时态要一致 |
| 表示“在……的时候” | The meeting was held when the weather was good. | 时态要一致 |
| 表示“在……之后” | He left when the train had left. | 时态要一致 |
如果你有具体的句子想分析,也可以告诉我,我可以帮你详细解析!