있으면 좋을 텐데

it would be nice if there were

→ 있다
phrase Uncommon #9,910
it would be nice if there were Expresses a wistful wish or hope that something exists or is available. It can also mean “I wish there were” depending on context.
KO: 시간이 더 있으면 좋을 텐데.
EN: It would be nice if we had more time.

배가 있으면 좋을 텐데

I wish I had a boat.

— 벼랑 위의 포뇨 (2008)

사람 이랑 헝겊이 더 있으면 좋을 텐데

It would be nice to have more people and cloth.

— 스테이션 7 (2017)

오늘은 조용히 있으면 좋을 텐데

I wish you would just be quiet today.

— 퍼펙트 블루 (1998)

유파님 도울 수 있으면 좋을 텐데

I wish I could help you, Yupa…

— 바람계곡의 나우시카 (1984)