틀림없다 Korean adjective conjugation
to be certain, to be sure
Every form of 틀림없다 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
- 틀림없는
- 아/어Infinitive
- 틀림없어
- -으니Since
- 틀림없으니
- 합니다Formal
- 틀림없습니다
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 | 틀림없어요 | 틀림없습니다 | 틀림없어 | 틀림없다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 틀림없었어요 | 틀림없었습니다 | 틀림없었어 | 틀림없었다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 틀림없겠어요 | 틀림없겠습니다 | 틀림없겠어 | 틀림없겠다 |
| -을 것이다Going to | 틀림없을 거예요 | 틀림없을 것입니다 | 틀림없을 거야 | 틀림없을 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 틀림없어요? | 틀림없습니까? | 틀림없어? | 틀림없으니? |
| 과거Past | 틀림없었어요? | 틀림없었습니까? | 틀림없었어? | 틀림없었니? |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 틀림없어요 | 안 틀림없습니다 | 안 틀림없어 | 안 틀림없다 |
| -지 않다Not (long) | 틀림없지 않아요 | 틀림없지 않습니다 | 틀림없지 않아 | 틀림없지 않다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 틀림없으세요 | 틀림없으십니다 | 틀림없으셔 | 틀림없으시다 |
| 과거Past | 틀림없으셨어요 | 틀림없으셨습니다 | 틀림없으셨어 | 틀림없으셨다 |
관형사형Modifying a noun
- 현재Present
- 틀림없는
- 과거Past
- 틀림없은
- 미래Future
- 틀림없을
- 회상Used to
- 틀림없던
연결Joining clauses
- -고and
- 틀림없고
- -게-ly / so that
- 틀림없게
- -어서so / and then
- 틀림없어서
- -으니까since
- 틀림없으니까
- -으면if / when
- 틀림없으면
- -지만but
- 틀림없지만
- -는데and / but (setting up)
- 틀림없는데
- -어도even if
- 틀림없어도
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 틀림없다
예문In real sentences
From the dictionary, each with its translation.
뉴욕 지하철이 프리타타를 정치적이라고 본 게 틀림없습니다.
Now clearly, frittatas are considered political by the MTA.
힘든 삶이었던 것이 틀림없다.
It had surely been a hard life.
네가 한 게 틀림없어!
It must be your doing!
대형 사고가 일어날 게 틀림없어
This is a tetanus shot waiting to happen.
자주 묻는 질문Common questions
How do you conjugate 틀림없다 in Korean?
틀림없다 (to be certain, to be sure) is 틀림없어요 in the polite 해요체, 틀림없습니다 in formal 합니다체, 틀림없어 in casual 반말 and 틀림없다 in the plain written style. The past is 틀림없었어요.
What is the past tense of 틀림없다?
틀림없었어요 in everyday polite speech, 틀림없었습니다 formally. It is built from the 아/어 form 틀림없어 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 틀림없다 a regular verb?
Yes. Its stem never changes shape: 틀림없습니다, 틀림없어, 틀림없으니 all keep 틀림없 intact. Only the ending moves.
What TOPIK level is 틀림없다?
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.