他们应该上课以获得最大化的利益。
They should attend their classes to receive the maximum benefit.
该上课了，我们停止了讲话。
我们不应该上课吃东西。
我不应该上课时讲话。
除此之外，我们应该上课认真听讲、记笔记。
Besides, we should listen to the teacher and take notes carefully in class.
八点我们该上课了。
然后他转身对梅根说：“宝贝，快去换衣服，该上课了。”
He turned to Megan and said, "Honey, go and put on your leotard. It's time for your class."
是该上课的时候了。
该上课了，但仍然有一些男孩子在那儿大声谈话。
It's time for class, but there are still some boys talking loudly over there.
你朋友来到学校时情绪很糟，铃声响了你该上课了。你会。
Your friend comes to school very upset. The bell rings so you need to go to.
而且我们应该上课认真听讲、记笔记、经常复习我们所学的、认真完成作业。
Besides, we should listen to the teacher and take notes carefully in class. Go over what is learnt regularly and finish doing our homework carefully.
而且我们应该上课认真听讲、记笔记、经常复习我们所学的、认真完成作业。
Besides, we should listen to the teacher and take notes carefully in class. Go over what is learnt regularly and finish doing our homework carefully.
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