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1 You mustn't hurt children 
2 You mustn't stay/be here
3 You mustn't feed animals in the zoo
4 We can't/mustn't use the phone on private business
5  One shouldn't interrupt each other during the discussion 
6 You musn't show him that you feel sorry for him 
7 You musn't/shouldn't contradict him, you must respect his age 
8 She shouldn't have missed the seminar 
9 "You mustn't argue with older people" said Mother 
10 You shouldn't have interfered in their affairs. You have spoilt everything