돌려준다고

In a sentence

• 그는 책을 반드시 돌려준다고 약속했어요.

  He promised to surely return the book.

  In this sentence, '돌려준다고' is used to indicate the act of promising to return an item that was borrowed.

• 나는 우산을 돌려준다고 계속 말했어.

  I kept saying I would return the umbrella.

  Here, '돌려준다고' expresses the intent to return something, showing repeated emphasis on this action in a conversation.

• 친구가 자전거를 돌려준다고 해서 기다렸어요.

  I waited because my friend said they would return the bicycle.

  In this usage, '돌려준다고' introduces the reason for an action, based on someone's statement to return something.