What´s the difference between MUST, and HAVE TO??
I don´t understand that on turkish,neither in english...

must is much stronger

Must refers to a legal or personal requirement. It either means the speaker thinks you have the obligation or that there is a legal requirement. If you exceed the speed limit you must pay a fine because that is a legal requirement.

Someone might think, you must act more responsibly after evaluating your actions. She thinks you acted irresponsibly therefore according to her own judgement, she might invite you to be more responsible by using "must" in her sentence. Let´s put aside the "probability" aspect of must and switch to "have to".

We use "have to" to talk about third party requirements. Consider this sentence:

We have to show up very early tomorrow, the boss will be waiting for us.

In this sentence, have to refers to a requirement placed by a third party.

must = moram ( moram da ućim jer pojma nemam a sutra imam ispit!) -nema druge nego da to učiniš

have to = morao bih da ućim jer nemam pojma ali ne da mi se,idem radije na pivo

možda je sada malo jasnije?

Alpha F,vineyards,thank´s i clear understand now!!!    
Milva,razumem sjajno! Hvala i tebi puno!  
Milva,i clear understand! Thank you a lot! (Zabranjeno je pisanje na domaćem jeziku na Forumu)