-는데

정의

1. since; used to convey current relevant circumstances before an explanation, suggestion, question, etc.
   morpheme
2. In the "intimate" speech level used between friends, by superiors to inferiors, etc., a verb-final suffix:
   morpheme
3. An exclamatory suffix conveying surprise or hesitation.
   morpheme
4. An interrogative suffix urging the listener to respond, used with an interrogative.
   morpheme

예문

“밖이 시끄러운데 무슨 일 있나?”

It's noisy outside; is something going on?

“날이 좋던데 어디 놀러 안 갈래?”

I saw that it was nice outside, why don't we go have fun?

“야, 밖에 눈 오는데 눈싸움하자!”

Hey, it's snowing outside! Let's have a snowball fight!

“여, 제법인데?”

Oh, nice performance; better than I expected!

“그렇지만 나이도 있으신데...”

But he's quite old...

“이러다⟳ 금메달도 따겠는데?”

At this rate, you're going to get the gold medal!

“뭐를 먹었는데?”

So what did you eat?

CEFR 등급