在英语语法中，时间状语从句是一个非常重要的组成部分，它用来描述主句动作发生的时间。通过学习和掌握时间状语从句，我们可以更准确地表达事件的时间顺序。以下是10个时间状语从句的例子，希望能帮助大家更好地理解和运用这一语法点。

1. When I arrived at the station, the train had already left.

- 当我到达车站时，火车已经离开了。

2. After she finished her homework, she went out to play.

- 在她完成作业后，她出去玩了。

3. Before you leave, please make sure the door is locked.

- 在你离开之前，请确认门已经锁好了。

4. As soon as he heard the news, he called his friend.

- 他一听到这个消息，就给他的朋友打了电话。

5. While they were having dinner, it started to rain.

- 当他们在吃晚饭的时候，开始下雨了。

6. Until midnight, we continued working on the project.

- 直到午夜，我们还在继续做项目。

7. Since last year, he has been studying hard for his exams.

- 自从去年以来，他一直在努力备考。

8. Whenever you have time, feel free to call me.

- 不管什么时候有空，随时可以给我打电话。

9. Every time he comes to town, we go out for dinner.

- 每次他来城里，我们都出去吃饭。

10. By the time you get home, I will have finished cooking.

- 到你到家的时候，我已经做好饭了。

以上这些例子展示了时间状语从句的不同形式和用法。通过这些句子，我们可以看到时间状语从句通常由特定的引导词（如when、after、before等）引导，并且它们的位置可以在主句之前或之后。希望这些例子能帮助大家更好地掌握时间状语从句的使用方法！