고 난

and I

→ 이다

phrase Uncommon #7,947

and I 고 connects a preceding noun or adjective to the next clause, while 난 is a contraction of 나는, meaning “I” or “as for me.” Often appears after 이다 as 이고 난.

KO: 나는 학생이고 난 매일 도서관에 가.

EN: I'm a student, and I go to the library every day.

형은 내 형제 고 난 형을 사랑해

He's my older brother, and I love him.

— 대부 (1972)