I didn't begin the class before all the students stoped talking.怎_英语解答

I didn't begin the class before all the students stoped talking.
怎么翻译,before是什么用法,谁能分析一下这个句子?

人气：364 ℃　时间：2019-10-19 12:36:42

解答

翻译：我直到所有的同学都停止说话的时候才开始上课!
这里的before相当于until!
not.until
not.before