책

책

Book.

Here, 책 is used as the direct object in the sentence and is marked with the object particle "을".

책을 읽는 것은 재미있어요.

Reading books is fun.

Here, 책 is the subject of the sentence and is marked with the subject particle "은".

그 책은 매우 유익해요.

That book is very informative.

Here, 책 is the subject of existence and is marked with the subject particle "이" to indicate its presence.

책상 위에 책이 있어요.

There is a book on the desk.