Classs begin, Classs over=Class is begin, Class is over

例句：

Class begins, boys and girls

同学们，开始上课了

相关介绍

A: When does your class begin?

几点上课？

How does a class begin there?

你们怎么开始一天的课？

What time does your class begin? It begins at eight-ten.

你的课几点开始？八点十分开始。