You MUST/ MUSTN'T take photos here.
MUSTN'T
You MUST/ MUSTN'T be quite.
MUST
You MUST/ MUSTN'T put litter in the bin.
MUST
You MUST/ MUSTN'T walk on the grass.
MUSTN'T
You MUST/ MUSTN'T turn off your mobile phone here.
MUSTN'T
We MUST/ MUSTN'T do our homework.
MUST
You MUST/ MUSTN'T smoke.
MUSTN'T
We MUST/ MUSTN'T walk on the path.
MUST
You MUST/ MUSTN'T wash your hands.
MUST
You MUST/ MUSTN'T walk your dog here.
MUSTN'T
You MUST/ MUSTN'T eat here.
MUSTN'T
You MUST/ MUSTN'T swim here.
MUSTN'T