활발하다

to be lively

Principal parts

관형사형Modifier
활발한
아/어Infinitive
활발해
-으니Since
활발하니
합니다Formal
활발합니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 활발해요활발합니다활발해활발하다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 활발했어요활발했습니다활발했어활발했다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 활발하겠어요활발하겠습니다활발하겠어활발하겠다
-을 것이다Going to 활발할 거예요활발할 것입니다활발할 거야활발할 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 활발해요?활발합니까?활발해?활발하니?
과거Past 활발했어요?활발했습니까?활발했어?활발했니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 활발해요안 활발합니다안 활발해안 활발하다
-지 않다Not (long) 활발하지 않아요활발하지 않습니다활발하지 않아활발하지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 활발하세요활발하십니다활발하셔활발하시다
과거Past 활발하셨어요활발하셨습니다활발하셨어활발하셨다

Modifying a noun

현재Present
활발한
과거Past
활발한
미래Future
활발할
회상Used to
활발하던

Joining clauses

-고and
활발하고
-게-ly / so that
활발하게
-어서so / and then
활발해서
-으니까since
활발하니까
-으면if / when
활발하면
-지만but
활발하지만
-는데and / but (setting up)
활발한데
-어도even if
활발해도

Sentence patterns

In real sentences

공기가 충분하면 더 활발하더라고요.

It seems that if the water is well-aerated, they're a lot more active.

숫자는 자연속에서 활발한 활동을 합니다.

Numbers were active agents in nature.

고통은 매우 연구가 활발하게 진행되는 분야입니다.

Pain is an area of active research.

범죄율이 떨어졌습니다. 거리들마다 사람들로 활발하게 북적대기 때문입니다.

Crime rates dropped, because the streets were alive with people.

Common questions

How do you conjugate 활발하다 in Korean?

활발하다 (to be lively) is 활발해요 in the polite 해요체, 활발합니다 in formal 합니다체, 활발해 in casual 반말 and 활발하다 in the plain written style. The past is 활발했어요.

What is the past tense of 활발하다?

활발했어요 in everyday polite speech, 활발했습니다 formally. It is built from the 아/어 form 활발하여 plus ㅆ, which is why an irregular stem shows its irregularity here.

Is 활발하다 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 활발하여 and 활발하니 but unchanged in 활발합니다.

What TOPIK level is 활발하다?

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.