김두규

In a sentence

• 김두규 씨는 서울에서 태어났습니다.

  Mr. Kim Doo-gyu was born in Seoul.

  Here, '김두규' is used as a proper noun, referring to a person's full name.

• 제가 다음 주에 김두규 씨를 만날 예정입니다.

  I am planning to meet Mr. Kim Doo-gyu next week.

  In this sentence, '김두규' is again used as a proper name, specifically denoting the individual being referred to in the context of a future meeting.

• 김두규의 작품은 아주 흥미롭다고 생각해요.

  I think Kim Doo-gyu's works are very interesting.

  Here, '김두규' is used as a possessive form (with the particle '의'), indicating that the subject's works are the topic of discussion.