School
do your homework
You must / have to do your homework.
touch the objects
You mustn't touch the objects.
drive safely
You must drive safely.
wear a uniform every day
You don't have to wear a uniform every day.
buy things in the souvernir shop
You can buy things in the souvenir shop.
drive at a 100 kmph when the limit is 90
You mustn't drive at a 100 kmph when the limit is 90.
speak when you don't raise your hand
You mustn't speak when you don't raise your hand.
eat in the cafeteria
You can eat in the cafeteria.
when you see the "STOP" sign
You have to stop when you see the "STOP" sign.
arrive by 7.40
You don't have to arrive by 7.40.
eat next to the paintings
You mustn't eat next to the paintings.
wear a helmet in the car
You don't have to wear a helmet in the car.
chew a gum during classes
You mustn't chew a gum during classes.
give your bag to the security for a check
You must / have to give your bag to the security for a check.
fasten the seatbelt
You have to fasten the seatbelt.