잊어버리다 Korean verb conjugation
to forget
Every form of 잊어버리다 across the four speech levels. It is a regular stem, so the endings below attach without changing it.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 잊어버리는
- 아/어Infinitive
- 잊어버려
- -으니Since
- 잊어버리니
- 합니다Formal
- 잊어버립니다
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 | 잊어버려요 | 잊어버립니다 | 잊어버려 | 잊어버린다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 잊어버렸어요 | 잊어버렸습니다 | 잊어버렸어 | 잊어버렸다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 잊어버리겠어요 | 잊어버리겠습니다 | 잊어버리겠어 | 잊어버리겠다 |
| -을 것이다Going to | 잊어버릴 거예요 | 잊어버릴 것입니다 | 잊어버릴 거야 | 잊어버릴 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잊어버려요? | 잊어버립니까? | 잊어버려? | 잊어버리니? |
| 과거Past | 잊어버렸어요? | 잊어버렸습니까? | 잊어버렸어? | 잊어버렸니? |
명령Commands
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 명령Do it | 잊어버리세요 | 잊어버리십시오 | 잊어버려 | 잊어버려라 |
| 청유Let's | 잊어버려요 | 잊어버립시다 | 잊어버려 | 잊어버리자 |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 잊어버려요 | 안 잊어버립니다 | 안 잊어버려 | 안 잊어버린다 |
| -지 않다Not (long) | 잊어버리지 않아요 | 잊어버리지 않습니다 | 잊어버리지 않아 | 잊어버리지 않는다 |
| 못Cannot | 못 잊어버려요 | 못 잊어버립니다 | 못 잊어버려 | 못 잊어버린다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 잊어버리세요 | 잊어버리십니다 | 잊어버리셔 | 잊어버리신다 |
| 과거Past | 잊어버리셨어요 | 잊어버리셨습니다 | 잊어버리셨어 | 잊어버리셨다 |
관형사형Modifying a noun
- 현재Present
- 잊어버리는
- 과거Past
- 잊어버린
- 미래Future
- 잊어버릴
- 회상Used to
- 잊어버리던
연결Joining clauses
- -고and
- 잊어버리고
- -게-ly / so that
- 잊어버리게
- -어서so / and then
- 잊어버려서
- -으니까since
- 잊어버리니까
- -으면if / when
- 잊어버리면
- -지만but
- 잊어버리지만
- -는데and / but (setting up)
- 잊어버리는데
- -어도even if
- 잊어버려도
진행In progress
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Is doing | 잊어버리고 있어요 | 잊어버리고 있습니다 | 잊어버리고 있어 | 잊어버리고 있다 |
| 과거Was doing | 잊어버리고 있었어요 | 잊어버리고 있었습니다 | 잊어버리고 있었어 | 잊어버리고 있었다 |
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 2를 잊어버리다
예문In real sentences
From the dictionary, each with its translation.
네가 잊어버린 줄 알았어.
I thought you'd forgotten.
왜 그 단어를 잊어버렸니?
Why have you forgotten the word?
이제 우리는 잊어버렸지만, 착륙선은 알겠네요.
Now, we forgot, but the lander knew.
하지만 5분 후에는 그가 시험봤던 사실조차 잊어버렸다.
But only five minutes later, he forgot the test had even taken place.
자주 묻는 질문Common questions
How do you conjugate 잊어버리다 in Korean?
잊어버리다 (to forget) is 잊어버려요 in the polite 해요체, 잊어버립니다 in formal 합니다체, 잊어버려 in casual 반말 and 잊어버린다 in the plain written style. The past is 잊어버렸어요.
What is the past tense of 잊어버리다?
잊어버렸어요 in everyday polite speech, 잊어버렸습니다 formally. It is built from the 아/어 form 잊어버려 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 잊어버리다 a regular verb?
Yes. Its stem never changes shape: 잊어버립니다, 잊어버려, 잊어버리니 all keep 잊어버리 intact. Only the ending moves.
What TOPIK level is 잊어버리다?
2급 — TOPIK 2, elementary.
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.