보니까

In a sentence

• 그 영화를 보니까 정말 재미있었어요.

  Watching that movie, it was really interesting.

  The usage of '보니까' here indicates observing or experiencing the movie, leading to the subsequent realization or impression of its interesting nature.

• 길을 지나가다 보니까 옛 친구를 만났어요.

  While walking down the street, I met an old friend.

  Here, '보니까' conveys the unexpected observation or encounter that occurred during the act of walking.

• 자료를 준비해보다 보니까 새로운 사실을 알게 되었어요.

  While preparing the materials, I discovered new facts.

  The term '보니까' in this sentence emphasizes the connection between the act of preparing the materials and the subsequent realization or learning of new facts.