-(으)ㄴ/는데 Explained: The Korean Connector That Does Three Jobs
Written and reviewed by Jun and Jin, native Korean speakers
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After this page, you can use -(으)ㄴ/는데 to set up background, contrast two ideas, and soften a request or a sentence ending.
10-second answer
How do you say -는데/-은데 meaning in Korean?
-(으)ㄴ/는데 (-(eu)n/neunde) links two clauses and does three things depending on context: (1) sets up background before the main point (지금 밖에 나가는데 뭐 필요해? jigeum bakke naganeunde mwo piryohae? = "I'm heading out — need anything?"), (2) contrasts them like "but" (비싼데 맛없어요 bissande madeopseoyo = "it's expensive but not good"), and (3) trails off at the end of a sentence to soften it (좀 추운데… jom chuunde… = "it's a bit cold, so…").
Quick check — did that land?
1. Which is the correct form for 바쁘다 (to be busy)?
You’ve heard -는데 in K-dramas over and over. It could be 'but', but not all the time.
Conjugation
| Type | Ending | Example |
|---|---|---|
| Action verb, present | -는데 | 가다 → 가는데, 먹다 → 먹는데, 있다/없다 → 있는데/없는데 |
| Adjective, vowel or ㄹ stem | -ㄴ데 | 바쁘다 → 바쁜데, 멀다 → 먼데 (ㄹ drops) |
| Adjective, consonant stem | -은데 | 작다 → 작은데, 좋다 → 좋은데 |
| Noun + 이다 | -인데 | 학생이다 → 학생인데 |
| Past tense (any type) | -았/었는데 | 갔는데, 바빴는데, 학생이었는데 |
| Future / guess | -(으)ㄹ 건데 / -겠는데 | 갈 건데, 비 오겠는데 |
The one adjective trap
있다/없다 and their compounds (맛있다, 재미없다) conjugate like verbs: 맛있는데, 재미없는데 — never 맛있은데.
See also: -느라고 vs -는 바람에
Job 1 — Background Before the Point
The most common use, and the one that doesn't translate to any single English word. The first clause gives context so the second clause makes sense — a question, a request, or the real news. Think of it as "so…", "and…", or just a comma.
저 지금 마트 가는데 뭐 사다 줄까요?
jeo jigeum mateu ganeunde mwo sada julkkayo?
I'm going to the store now — want me to get you anything?
The trip is background; the offer is the point.
어제 그 식당 갔는데 문 닫았더라고요.
eoje geu sikdang ganneunde mun dadatdeoragoyo.
I went to that restaurant yesterday, and it was closed.
Past -았/었는데. Not contrast — just setting the scene.
제가 한국 사람인데요, 뭐 도와드릴까요?
jega hanguk saraminde-yo, mwo dowadeurilkkayo?
I'm Korean, by the way — can I help with something?
Noun + 인데. Adding 요 turns the first half into its own polite sentence.
Job 2 — Contrast ("but")
When the two halves pull in opposite directions, -는데 reads as "but." It's softer than 하지만 and far more common in speech; 하지만 is what you write in an essay, -는데 is what you say.
이 옷 예쁜데 너무 비싸요.
i ot yeppeunde neomu bissayo.
These clothes are pretty, but way too expensive.
Adjective 예쁘다 → 예쁜데.
열심히 공부했는데 시험을 망쳤어요.
yeolsimhi gongbuhaenneunde siheomeul mangchyeosseoyo.
I studied hard, but I bombed the exam.
Compare -느라고 / -는 바람에, which explain a bad result instead of contrasting with it.
Job 3 — Trailing Off to Soften
End a sentence on -는데(요) and leave the second half unsaid. The listener fills in the request, refusal, or hint — which is exactly why Koreans use it to avoid sounding blunt. 지금 좀 바쁜데요 ("I'm a bit busy right now…") is a polite no. 이거 좀 큰데… ("this is a bit big…") means "do you have a smaller one?" In K-dramas the pause after -는데 is doing a lot of the acting.
죄송한데, 여기 자리 있어요?
joesonghande, yeogi jari isseoyo?
Sorry to bother you — is this seat taken?
죄송한데 / 미안한데 is the standard polite opener before a question or favor.
저는 괜찮은데요.
jeoneun gwaenchaneundeyo.
I'm fine, actually… (implying: but maybe you're not?)
The -데요 ending leaves room; a flat 괜찮아요 closes the topic.
Common Mistakes
Mistake #1 — Using -는데 on an adjective
바쁘는데 ✗ → 바쁜데 ✓. Only action verbs (and 있다/없다) take -는데.
Mistake #2 — Reading every -는데 as 'but'
Most of the time it's just background. If the second clause is a question or request, it isn't contrast.
Mistake #3 — Ending on -는데 in formal writing
The trailing-off softener is spoken Korean. In a report or email, finish the sentence.
Mini Quiz
2. What is -는데 doing in 지금 나가는데 뭐 필요해?
3. What does 지금 좀 바쁜데요… most likely mean?
Related Knowledge
Learn Next
-(으)ㄹ 것 같다: How to Guess, Hedge, and Sound Polite
-는데 softens the start of a sentence; -(으)ㄹ 것 같다 softens the end. Together they're the core of polite spoken Korean.
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