when定语从句例句20句如下：
1、The days when we used foreign oil are gone.
我们用洋油的日子一去不复返了。
2、I'll never forget the day when l was born.(=I'll never forget my birthday.)
我永远不会忘记我出生的日子。
3、lt happened in November when the weather was wet and cold.
这事发生在天气又湿又冷的十一月。
4、In the years that(which) followed,Marx kept on studying English and using it.
在这之后的几年中,马克思继续学习和使用英语。
5、The day (that) l always remember in all my life is my birthday.
我一生中最难忘的日子是我的生日。
6、There comes a time when you have to make a choice.
你必须作出抉择的时候到了。
7、Gone are the days when they could do what they liked.
他们为所欲为的日子一去不复返了。
8、We’ ll put off the picnic until next week, when the weather may be better.
我们将把野餐推迟到下星期，那时天气可能会好一点。
9、l want to be a teacher when l grow up.
当我长大的时候，我要做一名老师。
10、l won't forget the day when he says he loves me.
我不会忘记他说爱我的那一天。
11、Steve was left red-faced when a fan tried to rip his trousers off.
当一个歌迷试图扯掉他裤子时，史蒂夫满脸通红。
12、Harsh lines appeared in his face when his rheumatism was at its worst.
当他关节炎发作最厉害的时候，他痛得脸上起了很深的皱纹。
13、A stepson who stayed by your side when your own son deserted you.
你亲生儿子遗弃你时待在你身旁的继子。
14、The policemen were on patrol when they were ordered to investigate the incident.
当这些警察被命令去调查那个事件的时候，他们正在执勤巡逻。
15、She helped to keep the company alive when its very existence was threatened.
在公司的生存受到威胁时，她帮助公司存在了下来。
16、The admiring glances of strangers when she went on a promenade with Jules.
她与朱尔斯散步时陌生人投来的羡慕眼神。
17、Holdsworth was the villain of the piece when he missed an open goal.
霍尔兹沃思在无人防守的情况下未能进球，一下子成了比赛失利的罪魁祸首。
18、When she hit thirteen she shot up to a startling 5 foot 9.
她13岁时，一下子长到了令人吃惊的5英尺9英寸。
19、The special formula continues to beautify your tan when the day is done.
即使白天已经过去了，这种特别配方也会继续使你黝黑的皮肤变漂亮。
20、When asset sales are excluded, earnings per share rose from 3.4p to 5p.
不计算资产销售收入，每股收益由3.4便士涨到了5便士。