Must or mustn't?
turn off your mobile phone, put litter in the bin, walk on the grass, be quiet, walk your dog, wash your hands, take photos, eat here
You must put litter in the bin.
turn off your mobile phone, put litter in the bin, walk on the grass, be quiet, walk your dog, wash your hands, take photos, eat here
You must turn off your mobile phone.
turn off your mobile phone, put litter in the bin, walk on the grass, be quiet, walk your dog, wash your hands, take photos, eat here
You mustn't walk on the grass.