He’s quiet as a mouse in class.

上课时候他总是悄没声儿。

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

现在不得不走了, 因为得准时去上课。

He often reviews today's lessons for tomorrow.

他常为明上课而复习今课。

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

经常不得不在上课前攻读要讲东西。

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.

迟男孩抄捷径跑去上课。

The children were taught individually, not in a group.

孩子被个别教授，而不是一起上课。

I will inquire when to begin our lessons.

要去问一什么时候开始上课。

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

汤姆真没去上课，而且痛痛快快地玩了一场。

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

在上课时用玩具飞机发射器改制成了这把枪。

I was late for a class.

上课迟了。

He fell asleep during the lesson.

他在上课时睡着了。

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

托普西对文字记忆力非常强，上课时对答如流，使她教师感十分鼓舞。

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

上课铃响了，就在这时候老师走了进来。

It's time for class.

上课时间了。