When I got home, my mother was cooking dinner.（当我到家时，我妈妈正在做晚饭。）

While she was reading, her brother was watching TV.（她在读书的时候，她弟弟在看电视。）

As the sun set, the sky turned orange.（随着太阳落山，天空变成了橙色。）

After I finished my homework, I went out to play.（我完成作业后，出去玩耍了。）

Before he left for work, he kissed his wife goodbye.（他去上班之前，和妻子吻别。）

Since it started to rain, we have stayed at home.（自从开始下雨，我们就一直待在家里。）

Until the bell rang, the students didn't stop discussing.（直到铃声响起，学生们才停止讨论。）

Once you make a promise, you should keep it.（一旦你许下诺言，就应该遵守它。）

Whenever I feel sad, I listen to music.（每当我感到难过时，我就听音乐。）

The moment I saw her, I recognized her.（我一见到她，就认出了她。）

Every time he comes to town, he visits his old friends.（每次他进城，都会拜访他的老朋友们。）

Just as I was about to leave, the phone rang.（就在我正要离开时，电话响了。）

By the time we arrived at the cinema, the movie had already started.（我们到达电影院时，电影已经开始了。）

During the time he was in Paris, he learned a lot about art.（他在巴黎期间，学到了很多关于艺术的知识。）

As long as you work hard, you will achieve your goal.（只要你努力工作，你就会实现你的目标。）

Now that you have grown up, you should be responsible for your actions.（既然你已经长大了，你就应该对自己的行为负责。）

Even though it was late, he still continued working.（尽管很晚了，他仍然继续工作。）

No matter when you need help, just call me.（无论你什么时候需要帮助，尽管给我打电话。）

It was not until midnight that he went to bed.（直到午夜他才上床睡觉。）

She will call you as soon as she arrives at the airport.（她一到机场就会给你打电话。）