-ㄴ데/는데
But, Background Info
Connects sentences to give background info ('It's raining, so...') or to show contrast ('I studied, but...').
This pattern also has a main page: -ㄴ/는데 (Background Info, But).
How It Works
-ㄴ데/는데 is one of the most common and useful connective endings in Korean. It smoothly links two related ideas. Understanding its nuances is key to sounding more natural.
Conjugation Rules:
- Action Verbs & 있다/없다: Attach -는데 to the verb stem, regardless of whether it ends in a vowel or consonant.
- 가다 → 가는데 (going, so/but)
- 먹다 → 먹는데 (eating, so/but)
- 있다 → 있는데 (there is, so/but) - Descriptive Verbs (Adjectives):
- If the stem ends in a vowel, attach -ㄴ데. (e.g., 크다 → 큰데)
- If the stem ends in a consonant, attach -은데. (e.g., 작다 → 작은데) - Nouns: Attach -인데 to the noun.
- 학생 → 학생인데 (is a student, so/but)
- 의사 → 의사인데 (is a doctor, so/but) - Past Tense: Attach -았/었는데 to the verb/adjective stem.
- 갔다 → 갔는데 (went, but)
- 좋았다 → 좋았는데 (was good, but)
Main Usages:
1. Providing Background/Context: The first clause sets the scene for the second, which is often a question, suggestion, command, or statement.
- 내일 친구 생일인데, 무슨 선물을 살까요? (Tomorrow is my friend's birthday, so what gift should I buy?)
2. Showing Contrast: This is similar to -지만 (but), but often implies a softer contrast or a situation that is contrary to expectations.
- 그 옷은 예쁜데 너무 비싸요. (Those clothes are pretty, but they are too expensive.)
3. Mild Surprise/Exclamation (as a sentence ender): When used at the end of a sentence, it can express a feeling of admiration, surprise, or gentle disagreement.
- 와, 날씨 좋은데! (Wow, the weather is nice!)
Examples (5)
- 비가 오는데 우산 있어요?
It's raining, so do you have an umbrella?
Word by Word: Rain is coming, but/so umbrella exists?
The first clause (비가 오는데) provides the background situation for the question in the second clause.
- 이 식당 음식이 맛있는데 같이 갈래요?
This restaurant's food is delicious, so shall we go together?
Word by Word: This restaurant food is delicious, but/so together shall we go?
Here, '맛있는데' sets the context for making a suggestion.
- 열심히 공부했는데 시험에 떨어졌어요.
I studied hard, but I failed the test.
Word by Word: Diligently studied, but test on failed.
This example shows a clear contrast between the effort (studying hard) and the unexpected result (failing).
- 저는 학생인데, 할인받을 수 있어요?
I'm a student, so can I get a discount?
Word by Word: I am a student, but/so discount can receive?
This shows the usage with a noun + 인데. Being a student is the background information for asking about a discount.
- 와, 이 영화 정말 재미있는데!
Wow, this movie is really fun!
Word by Word: Wow, this movie really is fun!
Used as a sentence ender, it expresses the speaker's admiration or mild surprise about how fun the movie is.
Common Mistakes
Confusing -는데 (connective ending) with -는 데 (place/act of doing).
Different Meaning책 읽는데 조용한 곳이 필요해요.Better책 읽는 데는 조용한 곳이 필요해요.The key is the space. -는데 is a single grammatical ending that connects clauses. -는 데 is the noun modifier -는 plus the noun 데, meaning 'place' or 'act/case'. The correct sentence means 'For the act of reading a book, a quiet place is needed.' A correct use of -는데 would be: '책을 읽는데, 전화가 왔어요' (I was reading a book, and then the phone rang).
Using -는데 for a very direct cause-and-effect relationship where -아/어서 is more natural.
Different Meaning배가 아팠는데 병원에 갔어요.Better배가 아파서 병원에 갔어요.While the incorrect example isn't grammatically wrong, -아/어서 is much more natural for showing a direct reason or cause. 'My stomach hurt, so I went to the hospital.' Use -는데 for general background, not for the primary, direct cause of the following action.
Learn This First
To provide background info, you need modifier forms and conjugation.
Related Patterns
- -지만But
Both can mean 'but'. However, -지만 expresses a simple, direct contrast. -ㄴ데/는데 can also show contrast, but it's often softer and can also be used to provide background information, which -지만 cannot.
- -아/어서Because of, Therefore
Both can connect clauses with a sense of 'so'. -아/어서 indicates a direct cause-and-effect relationship. -ㄴ데/는데 provides a more general background situation that is not necessarily the direct cause of the second clause.
- -(으)니까So, Because
-니까 also means 'because/so' but it often expresses the speaker's subjective reason and is commonly followed by a command or suggestion. -ㄴ데/는데 sets a more objective background scene.
- -는 데Place Where, Location Where
This is a very common point of confusion. -ㄴ데/는데 is a connective ending. -는 데 (with a space) is the noun modifier -는 attached to the noun 데, which means 'place', 'situation', or 'the act of'. For example, '공부하는 데' means 'the place where I study' or 'the act of studying'.