높다고

In a sentence

• 이 산은 정말 높다고 들었어요.

  I heard this mountain is really high.

  In this sentence, '높다고' is used to quote information that someone has stated or reported about the mountain being high. The word '높다' means 'to be high' and the '-다고' ending is used to relay statements or remarks.

• 그 탑이 높다고 모두가 놀랐어요.

  Everyone was surprised by how high that tower is.

  Here, '높다고' is describing the quality of '높다' (to be high) about the tower in a reported sense, showing its impressive height as a reason for surprise.

• 저는 서울의 빌딩들이 매우 높다고 생각해요.

  I think the buildings in Seoul are very tall.

  In this sentence, '높다고' is used within a personal thought expression to indicate the speaker's opinion (marked by '생각해요') about the tallness of buildings in Seoul.