When I got home, my mother had already cooked dinner. （当我到家时，我妈妈已经做好了晚餐。）

When the bell rang, the students rushed out of the classroom. （当铃声响起时，学生们冲出了教室。）

When it rains, we usually stay at home. （当下雨的时候，我们通常待在家里。）

When she was young, she used to play the piano every day. （当她年轻时，她过去每天都弹钢琴。）

When he arrives, we will start the meeting. （当他到达时，我们将开始会议。）

When did you last see your old friend? （你上次什么时候见到你的老朋友的？） When I grow up, I want to be a doctor. （当我长大后，我想成为一名医生。）

When the sun sets, the sky turns beautiful colors. （当太阳落山时，天空变成美丽的颜色。）

When they heard the good news, they were very excited. （当他们听到这个好消息时，他们非常激动。）

When do you usually go to bed? （你通常什么时候上床睡觉？） When the movie started, everyone became quiet. （当电影开始时，每个人都安静了下来。）

When I'm feeling sad, I listen to music. （当我感到难过时，我听音乐。）

When spring comes, the flowers begin to bloom. （当春天来临时，花朵开始绽放。）

When you cross the road, you must be careful. （当你过马路时，你必须小心。）

When did you finish your homework? （你什么时候完成你的作业的？） When the dog saw me, it wagged its tail happily. （当狗看到我时，它高兴地摇着尾巴。）

When we went on a picnic, we had a great time. （当我们去野餐时，我们玩得很开心。）

When she reads books, she forgets about time. （当她读书时，她忘记了时间。）

When the party ended, we all said goodbye. （当派对结束时，我们都互相道别。）

When he was tired, he took a short rest. （当他累了时，他休息了一会儿。

）