있다고

있다고

"있다고" means "saying that (something) exists" or "that there is."

있다고 is used to report something heard, concerning an issue's presence.

나는 그곳에 문제가 있다고 들었어요.

I heard that there is a problem there.

있다고 is part of a subordinate clause indicating existence presumed by someone's belief.

이 집에 귀신이 있다고 믿는 사람들이 있어요.

There are people who believe that there is a ghost in this house.

있다고 indicates reported speech, referring to the existence of a book.

그는 여기에 책이 있다고 말했어요.

He said that there is a book here.