잠들다 Korean verb conjugation
to go to sleep
Every form of 잠들다 across the four speech levels. It is ㄹ dropping — ㄹ drops before ㄴ, ㅂ and ㅅ: 살다 → 삽니다. Regular, but universal.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 잠드는
- 아/어Infinitive
- 잠들어
- -으니Since
- 잠드니
- 합니다Formal
- 잠듭니다
현재Present
The tense that does the most work. 해요체 is the one to learn first — it is polite without being formal, and it is what most conversation is in.
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 잠들어요 | 잠듭니다 | 잠들어 | 잠든다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 잠들었어요 | 잠들었습니다 | 잠들었어 | 잠들었다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 잠들겠어요 | 잠들겠습니다 | 잠들겠어 | 잠들겠다 |
| -을 것이다Going to | 잠들 거예요 | 잠들 것입니다 | 잠들 거야 | 잠들 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잠들어요? | 잠듭니까? | 잠들어? | 잠드니? |
| 과거Past | 잠들었어요? | 잠들었습니까? | 잠들었어? | 잠들었니? |
명령Commands
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 명령Do it | 잠드세요 | 잠드십시오 | 잠들어 | 잠들어라 |
| 청유Let's | 잠들어요 | 잠듭시다 | 잠들어 | 잠들자 |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 잠들어요 | 안 잠듭니다 | 안 잠들어 | 안 잠든다 |
| -지 않다Not (long) | 잠들지 않아요 | 잠들지 않습니다 | 잠들지 않아 | 잠들지 않는다 |
| 못Cannot | 못 잠들어요 | 못 잠듭니다 | 못 잠들어 | 못 잠든다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잠드세요 | 잠드십니다 | 잠드셔 | 잠드신다 |
| 과거Past | 잠드셨어요 | 잠드셨습니다 | 잠드셨어 | 잠드셨다 |
관형사형Modifying a noun
- 현재Present
- 잠드는
- 과거Past
- 잠든
- 미래Future
- 잠들
- 회상Used to
- 잠들던
연결Joining clauses
- -고and
- 잠들고
- -게-ly / so that
- 잠들게
- -어서so / and then
- 잠들어서
- -으니까since
- 잠드니까
- -으면if / when
- 잠들면
- -지만but
- 잠들지만
- -는데and / but (setting up)
- 잠드는데
- -어도even if
- 잠들어도
진행In progress
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Is doing | 잠들고 있어요 | 잠들고 있습니다 | 잠들고 있어 | 잠들고 있다 |
| 과거Was doing | 잠들고 있었어요 | 잠들고 있었습니다 | 잠들고 있었어 | 잠들고 있었다 |
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 잠들다
예문In real sentences
From the dictionary, each with its translation.
절대로 잠들면 안 되겠죠.
You shouldn't be, certainly.
세 아이가 그곳에 누워 잠들어 있습니다.
Three kids lying on it, asleep.
우리는 잠들고자 노력하는 한 소년을 생각하죠.
We think about a little boy trying to get to sleep.
여러분은 잠든 것처럼 보이겠지만, 사실 그렇지 않습니다.
And it might seem like you were asleep, but you weren't.
자주 묻는 질문Common questions
How do you conjugate 잠들다 in Korean?
잠들다 (to go to sleep) is 잠들어요 in the polite 해요체, 잠듭니다 in formal 합니다체, 잠들어 in casual 반말 and 잠든다 in the plain written style. The past is 잠들었어요.
What is the past tense of 잠들다?
잠들었어요 in everyday polite speech, 잠들었습니다 formally. It is built from the 아/어 form 잠들어 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 잠들다 irregular?
Yes — it is ㄹ dropping (ㄹ 탈락). ㄹ drops before ㄴ, ㅂ and ㅅ: 살다 → 삽니다. Regular, but universal. That is why the stem looks different in 잠들어 and 잠드니 but unchanged in 잠듭니다.
What TOPIK level is 잠들다?
4급 — TOPIK 4, upper intermediate.
Dictionary form, meaning, sentence patterns, examples and audio from the 국립국어원 한국어기초사전, used under CC BY-SA 2.0 KR.
Conjugations are generated by this site's own engine and checked against the 9,380 forms the dictionary publishes on every build.