했었죠

did, used to do

→ 하다
했 Past tense + 었 Past tense + 죠 Polite sentence-ending (confirmation)
verb · informal, pluperfect tense Rare #29,897
did, used to do A past form that often recalls or confirms something that happened or was agreed on earlier.
KO: 어제 집에서 청소했었죠.
EN: I cleaned at home yesterday, remember?
Conjugation of 하다

먹을 것 좀 가지러 가려고 했었죠

I was going to go get something to eat.

— 이중 배상 (1944)

광주에서는 뭘 했었죠?

What did you do in Gwangju?

— 색, 계 (2007)

그래요, 그러기로 했었죠.

Yes, that's what we decided to do.

— 퍼펙트 스트레인저 (2016)