do homework
You must do homework
help your friends
You must help your friends
break the rules
You mustn't break the rules
put litter in the bin
You must put litter in the bin
be quiet in class
You must be quiet in class
raise your hand
You must raise your hand
eat in class
You mustn't eat in class
arrive on time
You must arrive on time
cheat on a test
You mustn't cheat on a test
follow the rules
You must follow the rules
stand in line
You must stand in line
sleep in class
You mustn't sleep in class
shout in class
You mustn't shout in class
Fight
You mustn't fight
run
You mustn't run
use your phone
You mustn't use your phone
be late
You mustn't be late
Drop litter
You mustn't drop litter