should have seen, should have looked at, should have taken (an exam)
자네도 그의 눈을 봤어야 해
You should have seen his eyes, too.
— 엘 시크레토: 비밀의 눈동자 (2009)
맙소사, 네 표정 좀 봤어야 했는데
Good grief, you should have seen the look on your face.
— 사랑해 줘 사랑해 줘 (2026)