嗯，我们上课不能迟到。

Well, we can't arrive late for class.

youdao

第二，当你上课时，不能戴帽子，第三，上课不能迟到，这是不好的，第四，下课后，不能在课室里或在走廊里玩，这是非常危险的。

Second, when you have classes, you can't wear a hat. Third, don't be late for class. It is not good. Fourth, after class, you can't run or play in the classroom or the hallways.

youdao

我们不能在上课日迟到。

We can't arrive late for class on weekdays.

youdao