jabi-는데①
-는데: Background Before the Point
Connective that frames background or a soft lead-in before the main clause — and often ends a sentence unfinished.
How to form it
| When | Form | Example |
|---|---|---|
| Action verb (present) | stem + -는데 | 가다 → 가는데 / 먹다 → 먹는데 |
| Descriptive verb / adjective | stem + -(으)ㄴ데 | 크다 → 큰데 / 좋다 → 좋은데 |
| 이다 / nouns | -인데 | 학생이다 → 학생인데 |
| Past | -았/었는데 | 갔는데 / 바빴는데 |
| Sentence-final (polite) | -는데요 | 바쁜데요 / 학생인데요 |
-는데 is the connective English speakers meet constantly and still mistranslate as “but.”
Sometimes it contrasts. Often it only sets the scene. Koreans also end sentences on -는데요 and leave the rest for you to infer.
The King Sejong Institute materials split this into two slots. This page is ① — background before the point. A later slot (②) leans into softer contrast. Same endings; different teaching focus.
Forms
| Stem type | Shape | Example |
|---|---|---|
| Action verb | -는데 | 가는데, 먹는데 |
| Adjective | -(으)ㄴ데 | 큰데, 좋은데 |
| Noun + 이다 | -인데 | 학생인데 |
| Past | -았/었는데 | 갔는데, 바빴는데 |
Polite sentence-final: add 요 → 가는데요, 좋은데요, 학생인데요.
Three jobs
1. Background setup
The first clause is the situation. The second is what matters now.
내일 시험인데 아직 공부 못 했어요.
I’ve got a test tomorrow, and I still haven’t studied.
지금 비가 오는데 우산이 없어요.
It’s raining, and I don’t have an umbrella.
English may insert “and,” “but,” or nothing. Korean marks the setup with -는데.
2. Soft contrast
Weaker than a hard “but.” Closer to “though” or a gentle turn.
맛있긴 한데 좀 짜요.
It is tasty, though it’s a bit salty.
For a blunter contrast you will later meet -지만. Do not rush there — -는데 is what conversation reaches for first.
3. Trailing off (-는데요)
The “main clause” stays unspoken. The listener is expected to finish the move: soft refuse, invite a response, or leave a hint.
오늘은 좀 바쁜데요.
I’m a bit busy today… (so maybe not / so what’s your plan?)
그거 제가 산 건데요.
That’s the one I bought… (so why are you…?)
This is why textbooks that only gloss “-는데 = but” fail in real talk.
Do not confuse it with -아서/어서
-아서/어서 claims cause. -는데 claims situation.
피곤해서 일찍 잤어요. ✅ tired → so I slept (cause)
피곤해 보이는데 일찍 자세요. ✅ you look tired — sleep early / setup for suggestion
피곤해서 일찍 자요. ❌ -아서 cannot precede a commandWhen the second half is a suggestion or request, -(으)니까 or a -는데 setup is safer than -아서.
Practice rule
If you are tempted to say “but” in English, ask: am I really opposing, or am I just loading context? If it is context, -는데 is probably the Korean you heard.
Do not confuse it with
Taught alongside this
In the Sejong course this appears in 불고기를 해 먹는 게 어때요? — Sejong Korean 2, Unit 4, on the theme of 장보기. These come with it:
Words used above
Quick check
No sign-up, no score saved — just see if it stuck.
1. Which form follows 좋다?
2. What does sentence-final 바쁜데요 often do?
3. How is -는데 different from a blunt English 'but'?
Common questions
When do I use -는데 vs -(으)ㄴ데?
Action verbs in the present: -는데 (가는데). Adjectives: -(으)ㄴ데 (좋은데). Past stems usually look like -았/었는데. Nouns use -인데.
Is trailing -는데요 rude?
Not by itself. Tone decides. Soft 바쁜데요 can refuse politely; a sharp fall can sound dismissive. The grammar leaves the next clause unspoken either way.
How is this different from -아서/어서?
-아서/어서 claims a cause. -는데 frames a situation. 비가 와서 못 갔어요 is causal; 비 오는데 우산 없어요 sets weather as background for the next point.
What is -는데② on the curriculum map?
A later Sejong slot that leans harder into soft contrast. This page is ① — background and lead-in. Learn the forms here first; the contrast flavour builds on the same endings.
Seen in the wild
Lessons where this pattern showed up in real Korean — news, slang, drama lines.