을 못

can't …; unable to …

→ 을
phrase Very common #721
can't …; unable to … 을 marks the object of the verb that follows 못, which expresses inability or not managing to do something. The object marker changes to 를 after a vowel.
KO: 나는 너무 바빠서 톰을 못 봐.
EN: I'm too busy to see Tom.

아무도 예상을 못 했나 봅니다

I guess no one saw it coming.

— 콘클라베 (2024)

그 사소한 일… 그 사소한 일을 못 참았어

That little thing... I couldn't put up with it.

— 더 플랫폼 (2019)

아직 거기까지 파악을 못 했습니다, 죄송합니다

I’m sorry, I haven’t figured that out yet.

— Officer Black Belt (2024)

난 나흘을 못 잤다

I haven't slept for four days.

— 파이트 클럽 (1999)

오늘 함선을 못 봐서 아쉬워

It’s a shame I didn’t get to see the ship today.

— 특별한 날 (1977)