电池使用前必须充电。

Before use, the battery must be charged.

《牛津词典》

睡觉前请关上电视。

Please turn the television off before you go to bed.

《牛津词典》

右转弯前你示意了吗？

Did you signal before you turned right?

《牛津词典》

III Yonder a maid and her wight Come whispering by: War's annals will fade into night Ere their story die.

那边一个女仆和她的同伴,走进来低语：,在故事结束前战争会没入夜色中。

耶鲁公开课 - 现代诗歌课程节选

Before eating the last slice, you could check with your friends to make sure it's alright for you to delve in.

在伸手拿最后那片披萨前，你可以跟你的朋友确认下，你吃完最后一片有没有关系。

Is it okay 课堂 - SpeakingMax英语口语达人

Interestingly, towards his death, I had the chance to meet him, And I asked him... He knew he was dying.

在他去世前，我曾经去拜访他，我问他。。。，他知道他就要离开人世。

普林斯顿公开课 - 人性课程节选