왜 그랬어요

Why did you do that?

→ 왜
phrase Rare #28,809
Why did you do that? A polite question; the subject and the action being referred to are usually understood from context.
KO: 대체 왜 그랬어요?
EN: Why on earth did you do that?

왜 그랬어요?

Why did you do that?

— 캐치 미 이프 유 캔 (2002)

바보 같이 왜 그랬어요?

Why did you do that, you idiot?

— 타이타닉 (1997)

당신은 이미 훌륭한 배우 인데 왜 그랬어요?

You're already a great actor, so why did you do that?

— 타인의 삶 (2006)

대체 왜 그랬어요?

Why on earth did you do that?

— 피케이: 별에서 온 얼간이 (2014)