는 알지만

know, but; although [someone] knows

→ 는

phrase Common #1,980

know, but; although [someone] knows 는 marks a topic or contrast, and 알지만 means “know, but.” The subject is understood from context; in 나는 알지만, 나는 means “I” with the topic marker 는.

KO: 나는 알지만, 그는 몰라요.

EN: I know, but he doesn’t.