잠그다 Korean verb conjugation
to lock
Every form of 잠그다 across the four speech levels. It is 으 irregular — The stem 으 drops before a vowel ending: 쓰다 → 써요.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 잠그는
- 아/어Infinitive
- 잠가
- -으니Since
- 잠그니
- 합니다Formal
- 잠급니다
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 | 잠가요 | 잠급니다 | 잠가 | 잠근다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 잠갔어요 | 잠갔습니다 | 잠갔어 | 잠갔다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 잠그겠어요 | 잠그겠습니다 | 잠그겠어 | 잠그겠다 |
| -을 것이다Going to | 잠글 거예요 | 잠글 것입니다 | 잠글 거야 | 잠글 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잠가요? | 잠급니까? | 잠가? | 잠그니? |
| 과거Past | 잠갔어요? | 잠갔습니까? | 잠갔어? | 잠갔니? |
명령Commands
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 명령Do it | 잠그세요 | 잠그십시오 | 잠가 | 잠가라 |
| 청유Let's | 잠가요 | 잠급시다 | 잠가 | 잠그자 |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 잠가요 | 안 잠급니다 | 안 잠가 | 안 잠근다 |
| -지 않다Not (long) | 잠그지 않아요 | 잠그지 않습니다 | 잠그지 않아 | 잠그지 않는다 |
| 못Cannot | 못 잠가요 | 못 잠급니다 | 못 잠가 | 못 잠근다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잠그세요 | 잠그십니다 | 잠그셔 | 잠그신다 |
| 과거Past | 잠그셨어요 | 잠그셨습니다 | 잠그셨어 | 잠그셨다 |
관형사형Modifying a noun
- 현재Present
- 잠그는
- 과거Past
- 잠근
- 미래Future
- 잠글
- 회상Used to
- 잠그던
연결Joining clauses
- -고and
- 잠그고
- -게-ly / so that
- 잠그게
- -어서so / and then
- 잠가서
- -으니까since
- 잠그니까
- -으면if / when
- 잠그면
- -지만but
- 잠그지만
- -는데and / but (setting up)
- 잠그는데
- -어도even if
- 잠가도
진행In progress
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Is doing | 잠그고 있어요 | 잠그고 있습니다 | 잠그고 있어 | 잠그고 있다 |
| 과거Was doing | 잠그고 있었어요 | 잠그고 있었습니다 | 잠그고 있었어 | 잠그고 있었다 |
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 2를 잠그다
예문In real sentences
From the dictionary, each with its translation.
문 꼭 잠그고 자
Just, keep your door locked.
나 대신 문 잠가
Lock up for me.
우린 문을 잠가야 돼
We should lock the door. What?
문을 네가 안 잠갔어
You didn't lock the door.
자주 묻는 질문Common questions
How do you conjugate 잠그다 in Korean?
잠그다 (to lock) is 잠가요 in the polite 해요체, 잠급니다 in formal 합니다체, 잠가 in casual 반말 and 잠근다 in the plain written style. The past is 잠갔어요.
What is the past tense of 잠그다?
잠갔어요 in everyday polite speech, 잠갔습니다 formally. It is built from the 아/어 form 잠가 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 잠그다 irregular?
Yes — it is 으 irregular (으 불규칙). The stem 으 drops before a vowel ending: 쓰다 → 써요. That is why the stem looks different in 잠가 and 잠그니 but unchanged in 잠급니다.
What TOPIK level is 잠그다?
3급 — TOPIK 3, lower 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.