Bonsoir
1- I must be on time.
2- I can't be late.
3- I can help my friends
4- I must do my homework.
5- I must raise my hand before answering.
6- I must keep silent.
7- I can't cheat.
8- I mustn't chat with friends during class.
9- I can eat at the self at school.
10- I must listen to the teacher.
11- I can borrow books at the school library.
12- I can't chew gums.
13- I can't smoke.
14- I can't use my cellphone.
etc...
Bonne soirée ☺☺☺
