请在上课之前把你们的练习交上来。

Please pass up your exercises before class.

youdao

在上课之前，小朋友们，我们猜个谜语，好不好？

Kiddies, let's guess a riddle before our class, OK?

youdao

约翰在上课之前大体浏览了一遍阅读作业。

John scanned the reading assignment briefly before class.

youdao

But that was before taking positive psychology class. That was before taking the class.

但那是在上积极心理学课之前，是在上课之前。

哈佛公开课 - 幸福课课程节选

After your entrance here, what kind of process did you go through before starting your classes?

在你被录取后，但还没有正式上课之前，你都经历了什么呢？

写推荐书的人 - SpeakingMax英语口语达人

Welles heard that obviously, and he quickly came back. But when she died, he stopped taking lessons, before that, he was adept before he was ten years old.

威尔斯当然听到了，所以他,很快回来了，但在,他母亲去世之后，他就不再上课了，在这之前，在他十岁的时候他就对乐器很熟练了。

麻省理工公开课 - 电影哲学课程节选