가 안

doesn't …

→ 가
phrase Very common #388
doesn't … 가 marks the subject, and 안 negates the following verb or adjective. The English wording depends on what follows.
KO: 비가 안 와요.
EN: It isn't raining.

호수에는 참치가 안 살지

Tuna don't live in lakes, do they?

— 빅 식 (2017)

프랭크가 안 왔거든

Frank didn’t show up.

— 옛날 옛적 서부에서 (1968)