He’s quiet as a mouse in class.

上课的时候他总是悄没声儿的。

I have to go now because I must be punctual for class.

我现在不得不走, 因为我得准时去上课。

He often reviews today's lessons for tomorrow.

他常为明天上课而复习今天的功课。

I'm constantly having to mug up things ahead of teaching them.

我经常不得不在上课前攻读要讲的东西。

The teacher took attendance at the beginning of every class.

每次一上课老师都要点名。

The late boy made a beeline for his classroom.

的男孩抄捷径跑去上课。

The children were taught individually, not in a group.

孩子们被个别教授，而不是一起上课。

I will inquire when to begin our lessons.

我要去问一下我们什么时候开始上课。

Tom did play hookey, and he had a very good time.

汤姆真的没去上课，而且痛痛快快地玩一场。

I made the zip gun in class out of a toy airplane launcher.

我在上课时用玩具飞机发射器改制成这把枪。

I was late for a class.

我上课。

He fell asleep during the lesson.

他在上课时睡着。

Topsy had an uncommon verbal memory, and committed with a fluency that greatly encouraged her instructress.

托普西对文字的记忆力非常强，上课时对答如流，使她的教师感十分鼓舞。

The bell sounded for the beginning of the lesson, and, right on cue, the teacher walked in.

上课铃响，就在这时候老师走进来。

It's time for class.

上课时间。