该上课了 It is time for ; It's time for class ; The class of ; It`s time for class

是该上课的时间了 Was the class time ; Is the time for class

停止交谈该上课了 Stop talking to the class ; The class was stop talking

我们应该上课认真听讲 We should conscientiously listening classes ; Lecture class we should seriously

该上课去了 The class to the

你不应该上课睡觉 You should not sleep class

我们不应该上课睡觉 We should not sleep school

我们应该上课好好听讲 We should take class attendance

该上音乐课 The music lesson ; The music class

该上英语课了 The English class ; time for English class ; The English lesson on