You ...
You mustn't walk on the flowers.
You ...
You mustn't swim here
You ...
You mustn't walk your dog here.
You ...
You mustn't smoke here.
You ...
You mustn't take photos here.
You ...
You mustn't park here.
You ...
You must fasten your seatbelt.
You ...
You mustn't turn left here.
You ...
You must turn off your mobile phone.
You ...
You must stop.
You ...
You must wash your hands.
You ...
You mustn't turn right.
You ...
You mustn't walk on the grass.
You ...
You mustn't eat here.
You ...
You must put litter in the bin.
You ...
You must be quiet here.