mustn't
لان الالذام خارج المتكلم وليس له اختيار ان يذهب او لا يذهب اما have toتعبر عن شعور ذاتى للمتكلم note
we have to buy presents for our friends
this express inner feeling
and we can say
we dont have to buy presents for our frienda
u have choice in this case
Best wishes
|