어떻게 아셨죠

how did you know

→ 어떻게
phrase Rare #30,496
how did you know Polite, respectful phrasing; 아셨죠 uses an honorific form of “know.”
KO: 제가 올 줄은 어떻게 아셨죠?
EN: How did you know I was coming?

오늘 일을 어떻게 아셨죠?

How did you know about today's work?

— 이탈자 (1990)

나치 란 걸 어떻게 아셨죠?

How did you know he was a Nazi?

— 인디아나 존스: 최후의 성전 (1989)

어떻게 아셨죠?

How did you know?

— 시네마 천국 (1988)

이 집 이름이 일 마레인 건 어떻게 아셨죠?

How did you know this house was called Il Mare?

— Il Mare (2000)