我的生物老师怀特先生在上课前五分钟来到了教室。
My biology teacher, Mr. White, came to the classroom five minutes before the class began.
你在上课前有预习的吗？
上课前检查一下麦克笔。
上课前我们做早操。
就在上课前，玛丽摔碎了她的眼镜。
值班生应该在上课前分发练习本。
The student on duty should hand out the exercise books before class.
课前复习来上课前做的笔记。
Before class, review your notes you have taken before you come to class.
我必须在上课前匆匆写出一篇学期论文。
最好是在上课前就已经阅读过指定材料。
Ideally, keep up with the readings before you come to class.
他在上课前给我们讲了个非常幽默的故事。
请早几分钟到，你在上课前要填几份表格。
Be here a few minutes early. You need to complete some forms before the class.
我期待你们上课前都准备好了。
你们手头上东西，都是我们在上课前买到的。
So, these things here that you have in your hand, is the results of my spontaneously going to staples before class.
我们需要在上课前交练习本吗？
老师要求我们上课前将试卷交上去。
我希望你们上课前，阅读这个时已经注意到了。
I hope some of you noticed this when you were reading over this before you came to class.
上课前先做好准备并按时到达课堂。
请在上课前调好乐器的音调。
老师在上课前给每个学生发一份提纲。
Before his class, the teacher gave each and every students a handout.
我们上课前就此话题聊天。
上课前约翰正在和哈利玩。
我想第二天早点起来到学校，以便上课前完成作业。
I thought I could get up earlier to go to school the next morning so that I could finish my homework before class.
上课前把笔记复习一下。
一天上课前，梅根的父亲找来说想跟我谈谈。
我总是预览和掌握这一课上课前的主要思想。
I always preview and master the main idea of the lesson before class.
下次上课前请把黑板擦和粉笔放在老师书桌上。
Next time please put the eraser and chalk on the teachers desk before class.
请在上课前一天用电子邮件把这些问题发送给教授。
Please email your question to the professor the day before the class.
上课前一小时看看指定阅读些什么材料你就去上课啦！
LL: I read the reading assignment just an hour before class began.
上课前一小时看看指定阅读些什么材料你就去上课啦！
LL: I read the reading assignment just an hour before class began.
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