-(으)ㄹ 텐데
it would probably …, (so/but)
Level 3 · Connective
Explanation
The speaker's guess as background, often with concern or regret; sentence-final -(으)ㄹ 텐데요. -았/었을 텐데 expresses what would have happened.
Examples
주말이라 사람이 많을 텐데 일찍 출발합시다.
It'll be crowded on the weekend, so let's leave early.
혼자 이사하기 힘들 텐데 도와줄까요?
Moving alone must be hard. Shall I help?
미리 알았으면 좋았을 텐데요.
It would have been nice to know in advance.
TOPIK note
TOPIK II Listening 4–8 and Reading 1–2.