Don't be late.

Don't be absent.

Don't sleep in the class.

Don't cheat in the exam.

Don't talk a lot.

Don't run.

Don't walk.

Don't wear sportswear.

Don't bring snacks to the class.

Don't connect with boys or girls very close.

Don't go to dangerous places.

Don't ignore the school rules.

这些句子涵盖了在学校中常见的一些禁止行为，包括迟到、缺席、在课堂上睡觉、作弊、讲话、跑步、走路、穿运动服、带零食到教室、过于亲密的与异性接触、去危险的地方以及忽视学校规则等。希望这些信息对你有所帮助。