用英语怎么表达校规

问题描述:

用英语怎么表达校规
用英语把上课时的“不许”表达出来.
不是校规用英语表达,是写几个学校规定的规则。

You should listen carefully.
You shuold be polie to teacher.
You shouldn't be rude.
You shouldn't talk to other in the class .
You should ……