postane

In a sentence

• Kada čovjek postane umoran, treba se odmoriti.

  When a person becomes tired, they need to rest.

  The word 'postane' is used to indicate a change of state or transformation, in this case, becoming tired.

• Postane mi hladno kada puše jak vjetar.

  I become cold when a strong wind blows.

  Here, 'postane' expresses a personal experience of beginning to feel cold.

• Nadam se da će on postati slavan jednog dana.

  I hope he will become famous one day.

  In this example, 'postane' (future tense: 'postati') is used to express a future change in someone's state or condition, becoming famous.