We do morning exercises before classes begin.
上课前我们做早操。
Please pay the tuition for each period before classes.
每期学费请于上课前缴交。
Before classes start up again, think about what you learned.
在课程开始之前，想想你学到了些什么。
He has to get up before 7:10 and go for a run before classes begin.
他不得不在7：10前起床，然后在课前晨跑。
She always gets her homework done before classes and the homework comes out good.
课程结束至考试期间，电话联系多次，都有在家认真刷题准备。
Take classes in many different subjects before picking your major.
在选择你的专业之前去不同的学科听课。
So before you try to work with your classes, be sure to compile them.
因此在使用这些类之前一定要编译它们。
Take classes in a subject you've never taken before.
选学一门你从未选过的课程。
Dear Parents, please read school terms before you register for classes.
亲爱的家长，在给您的小孩注册课程前请先阅读学校合同！
Have you taken any classes of New Oriental School before?
你在新东方学校学习过么？
Usualy we have four classes in the morning. It's along time before lunch.
通常我们上午有四节课，午饭前这是一段很长的时间。
Every morning, before they go to their university classes.
每天清晨去大学上课之前。
Then I usually have breakfast before 8 cause classes begin at 8.
然后在八点前吃早饭，因为第一节课都是八点开始的。
In the morning we usually have four classes. It's a long time before lunch.
在早上我们通常有四节课，离午餐还有很长一段时间。
Their isn't an existing program to teach this in school before teaching regular classes.
他们不是一个现有的程序，在普通班教学在学校任教。
Their isn't an existing program to teach this in school before teaching regular classes.
他们不是一个现有的程序，在普通班教学在学校任教。
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