가 있는데

there is/are ... but; someone/something exists or is present, often introducing a contrast or question

→ 가
phrase Rare #24,569
there is/are ... but; someone/something exists or is present, often introducing a contrast or question Used after a noun ending in a vowel with the subject marker 가 and the connective 그런데/는데. It commonly provides background before a contrast, explanation, or follow-up question. The exact meaning depends on context.
KO: 케이티가 있는데 뭐가 문제야?
EN: Katie is here, so what's the problem?

분화구가 있는데

There’s a crater.

— 크리에이터 (2023)

케이티가 있는데 뭐가 문제 야?

What's wrong with having Katie?

— 미스틱 리버 (2003)