그랬는데

said that, did that

→ 그러다
그랬 Past tense + 는데 Background/contrast connective
verb · informal, past tense Rare #26,314
said that Often used when the words or idea being referred to are clear from context.
KO: 엄마가 그랬는데, 오늘 비 온대.
EN: Mom said it would rain today.
did that Refers to an action or behavior already mentioned or understood from context.
KO: 왜 그랬는데?
EN: Why did you do that?
Conjugation of 그러다

아, 진짜 박세리 니 왜 그랬는데?

Oh, seriously, Park Seri, why did you do that?

— Love Untangled (2025)

누가 그랬는데?

Who said that?

— Pandora (2016)