불확실하다 Korean adjective conjugation
be uncertain
Every form of 불확실하다 across the four speech levels. It is 여 irregular — 하다 and every verb built on it: 하다 → 하여 → 해요.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 불확실한
- 아/어Infinitive
- 불확실해
- -으니Since
- 불확실하니
- 합니다Formal
- 불확실합니다
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 | 불확실해요 | 불확실합니다 | 불확실해 | 불확실하다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 불확실했어요 | 불확실했습니다 | 불확실했어 | 불확실했다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 불확실하겠어요 | 불확실하겠습니다 | 불확실하겠어 | 불확실하겠다 |
| -을 것이다Going to | 불확실할 거예요 | 불확실할 것입니다 | 불확실할 거야 | 불확실할 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 불확실해요? | 불확실합니까? | 불확실해? | 불확실하니? |
| 과거Past | 불확실했어요? | 불확실했습니까? | 불확실했어? | 불확실했니? |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 불확실해요 | 안 불확실합니다 | 안 불확실해 | 안 불확실하다 |
| -지 않다Not (long) | 불확실하지 않아요 | 불확실하지 않습니다 | 불확실하지 않아 | 불확실하지 않다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 불확실하세요 | 불확실하십니다 | 불확실하셔 | 불확실하시다 |
| 과거Past | 불확실하셨어요 | 불확실하셨습니다 | 불확실하셨어 | 불확실하셨다 |
관형사형Modifying a noun
- 현재Present
- 불확실한
- 과거Past
- 불확실한
- 미래Future
- 불확실할
- 회상Used to
- 불확실하던
연결Joining clauses
- -고and
- 불확실하고
- -게-ly / so that
- 불확실하게
- -어서so / and then
- 불확실해서
- -으니까since
- 불확실하니까
- -으면if / when
- 불확실하면
- -지만but
- 불확실하지만
- -는데and / but (setting up)
- 불확실한데
- -어도even if
- 불확실해도
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 불확실하다
예문In real sentences
From the dictionary, each with its translation.
그가 불확실해 하는 걸 제가 얘기했죠.
I mentioned the doubt that he was having.
우리의 미래도 불확실하잖아.
With our future so uncertain.
에클스턴과의 계약은 1년이었는데 당시에는 드라마가 부활 시리즈 하나를 너머 계속될 것인지 불확실해서였다.
Eccleston's contract was for a single year because at the time it was uncertain whether the show would continue beyond a single revival series.
여전히 많은 것들이 불확실하죠.
Now, there are still uncertainties here.
자주 묻는 질문Common questions
How do you conjugate 불확실하다 in Korean?
불확실하다 (be uncertain) is 불확실해요 in the polite 해요체, 불확실합니다 in formal 합니다체, 불확실해 in casual 반말 and 불확실하다 in the plain written style. The past is 불확실했어요.
What is the past tense of 불확실하다?
불확실했어요 in everyday polite speech, 불확실했습니다 formally. It is built from the 아/어 form 불확실하여 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 불확실하다 irregular?
Yes — it is 여 irregular (여 불규칙). 하다 and every verb built on it: 하다 → 하여 → 해요. That is why the stem looks different in 불확실하여 and 불확실하니 but unchanged in 불확실합니다.
What TOPIK level is 불확실하다?
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.