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