While I was doing my homework, my mother was cooking dinner.（我在做作业的时候，妈妈在做晚饭。）

While he was watching TV, his phone rang.（他看电视的时候，电话响了。）

While she was walking in the park, she saw a beautiful flower.（她在公园散步时，看到了一朵漂亮的花。）

While they were playing football, it started to rain.（他们踢足球的时候，开始下雨了。）

While the baby was sleeping, the parents were quietly reading books.（宝宝睡觉的时候，父母在安静地看书。）

While I was waiting for the bus, I listened to music.（我等公交车的时候，听着音乐。）

While he was running, he thought about his plan for the day.（他跑步的时候，思考着当天的计划。）

While she was painting, her cat jumped on the table.（她画画的时候，她的猫跳到了桌子上。）

While the students were having a class, a bird flew into the classroom.（学生们上课的时候，一只鸟飞进了教室。）

While I was cleaning my room, I found an old photo.（我打扫房间的时候，找到了一张旧照片。）

While he was driving, he noticed a strange noise from the engine.（他开车的时候，注意到发动机有奇怪的声音。）

While she was shopping, she met an old friend.（她购物的时候，遇到了一位老朋友。）

While the children were playing games, their parents were chatting.（孩子们玩游戏的时候，他们的父母在聊天。）

While I was writing a letter, the pen ran out of ink.（我写信的时候，钢笔没墨水了。）

While he was studying for the exam, his sister was watching a movie.（他为考试复习的时候，他妹妹在看电影。）

While she was watering the plants, it suddenly got windy.（她浇花的时候，突然起风了。）

While the workers were building the house, they had to deal with some problems.（工人们盖房子的时候，不得不处理一些问题。）

While I was taking a shower, the phone rang loudly.（我洗澡的时候，电话大声响了起来。）

While he was reading a novel, he fell asleep on the couch.（他读小说的时候，在沙发上睡着了。）

While she was practicing the piano, her dog sat beside her quietly.（她练钢琴的时候，她的狗安静地坐在她旁边。

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