A: What do you think of laser treatment?
B: Why? Do you want to have some done?
A: Yeah, on the wrinkles around my eyes.
B: I knew it wouldn't work.
여기서 마지막 문장에서 왜 know가 아니라 knew가 온거죠..
I know it wouldn't work 가 되야하지 않을까요?

A: What do you think of laser treatment?
B: Why? Do you want to have some done?
A: Yeah, on the wrinkles around my eyes.
B: I knew it wouldn't work.
여기서 마지막 문장에서 왜 know가 아니라 knew가 온거죠..
I know it wouldn't work 가 되야하지 않을까요?

눈가의 주름에 레이저가 효과가 없을 줄 알았어!라는 뜻으니까 I knew it wouldn't work라고 쓰는게 맞습니다~