불확실하다

be uncertain

Principal parts

관형사형Modifier
불확실한
아/어Infinitive
불확실해
-으니Since
불확실하니
합니다Formal
불확실합니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 불확실해요불확실합니다불확실해불확실하다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 불확실했어요불확실했습니다불확실했어불확실했다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 불확실하겠어요불확실하겠습니다불확실하겠어불확실하겠다
-을 것이다Going to 불확실할 거예요불확실할 것입니다불확실할 거야불확실할 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 불확실해요?불확실합니까?불확실해?불확실하니?
과거Past 불확실했어요?불확실했습니까?불확실했어?불확실했니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 불확실해요안 불확실합니다안 불확실해안 불확실하다
-지 않다Not (long) 불확실하지 않아요불확실하지 않습니다불확실하지 않아불확실하지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 불확실하세요불확실하십니다불확실하셔불확실하시다
과거Past 불확실하셨어요불확실하셨습니다불확실하셨어불확실하셨다

Modifying a noun

현재Present
불확실한
과거Past
불확실한
미래Future
불확실할
회상Used to
불확실하던

Joining 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

Sentence patterns

In real sentences

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.

Common 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.