-을걸요

Korean Alternative forms ko -ㄹ걸요 after vowel or ko ㄹ-final stems Pronunciation Suffix suffix conveys uncertainty or soft speculation and is often used in spoken language, especially in casual or semi-polite speech ko 그 사람 벌써 갔을걸요. He/she must have already left. ko 아마도 영희가 도왔을걸요. Maybe Younghee helped.