거라서요

because it is/was; because I'm going to

→ 것
phrase Rare #27,821
because it is/was; because I'm going to A conversational, polite way to give a reason. The meaning depends on the verb or adjective before 거라서요.
KO: 오늘은 일찍 갈 거라서요.
EN: Because I'm going to leave early today.

떠날 거 라서요

Because I'm leaving.

— 신경쇠약 직전의 여자 (1988)

빌린 거 라서요

Because I borrowed it.

— 인생 (1994)