프로야구

In a sentence

• 그는 프로야구 경기를 아주 좋아합니다.

  He really enjoys watching professional baseball games.

  Here, '프로야구' is used as a noun to signify the sport 'professional baseball'.

• 프로야구 선수들은 엄격한 훈련을 받습니다.

  Professional baseball players undergo rigorous training.

  In this sentence, '프로야구' operates as a modifier to define 'players' as belonging to 'professional baseball'.

• 한국의 프로야구는 많은 관중들에게 인기가 있습니다.

  Korea's professional baseball is popular among many spectators.

  Here, '프로야구' is the subject of the sentence, referring to the organized league of professional baseball in Korea.