Must not Vs Doesn’t have to/ Don’t have to

Must Not ( Mustn’t )
=> Used to express prohibition ( mengekpresikan larangan)
Ex:
– it’s a non-smoking room. You mustn’t smoke here.
– children must not play with matches.

Doesn’t Have to / Don’t have to
=> used to express ‘lack of necessity ( mengekspresikan tidak adanya keharusan).
– Tomorrow is a holiday. Mary doesn’t have to go to school.
– I fished all my homework this afternoon. I don’t have to study tonight.

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