napisao

In a sentence

• Ivan je napisao pismo svom prijatelju.

  Ivan wrote a letter to his friend.

  Here, 'napisao' is used in the past tense to indicate that Ivan completed the action of writing a letter in the past.

• Tko je napisao ovu knjigu?

  Who wrote this book?

  In this question, 'napisao' is used to inquire about the author of a book, emphasizing the completed action in the past.

• Napisao bih poruku, ali nemam olovku.

  I would write a message, but I don't have a pen.

  In this sentence, 'napisao bih' is used to express a conditional action that would occur under specific conditions in the present or future.