zašto

In a sentence

• Zašto kasniš na sastanak?

  Why are you late for the meeting?

  In this sentence, 'zašto' is used to directly ask about the reason for someone's tardiness.

• Pitam se zašto je otišla tako rano.

  I wonder why she left so early.

  Here, 'zašto' introduces the clause describing the reason that is being wondered about.

• Nije mi jasno zašto to misliš.

  It's not clear to me why you think that.

  'Zašto' in this sentence is used to question the reason behind someone's thought.