못 한다고

can't do it

→ 못
phrase Rare #19,510
can't do it Often used to insist that someone cannot do something, or to quote the claim “I/you/he can’t do it.” The subject and object are understood from context.
KO: 나도 그렇게는 못 한다고.
EN: I’m telling you, I can’t do it that way either.

나도 잘 못 한다고

That I’m not good at it either.

— 너자 (2019)

못 한다고?

You can't do it?

— 위플래쉬 (2014)

그냥 못 한다고 했어요

I just said I couldn't do it.

— 패딩턴 2 (2017)

신문 몇 장 보고는 저런 진술 못 한다고

You can't make a statement like that just from reading a few pages of the newspaper.

— The Chaser (2008)

못 한다고!

I can't do it!

— 엠 (1931)