행복하다

to be happy

Principal parts

관형사형Modifier
행복한
아/어Infinitive
행복해
-으니Since
행복하니
합니다Formal
행복합니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 행복해요행복합니다행복해행복하다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 행복했어요행복했습니다행복했어행복했다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 행복하겠어요행복하겠습니다행복하겠어행복하겠다
-을 것이다Going to 행복할 거예요행복할 것입니다행복할 거야행복할 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 행복해요?행복합니까?행복해?행복하니?
과거Past 행복했어요?행복했습니까?행복했어?행복했니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 행복해요안 행복합니다안 행복해안 행복하다
-지 않다Not (long) 행복하지 않아요행복하지 않습니다행복하지 않아행복하지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 행복하세요행복하십니다행복하셔행복하시다
과거Past 행복하셨어요행복하셨습니다행복하셨어행복하셨다

Modifying a noun

현재Present
행복한
과거Past
행복한
미래Future
행복할
회상Used to
행복하던

Joining clauses

-고and
행복하고
-게-ly / so that
행복하게
-어서so / and then
행복해서
-으니까since
행복하니까
-으면if / when
행복하면
-지만but
행복하지만
-는데and / but (setting up)
행복한데
-어도even if
행복해도

Sentence patterns

In real sentences

우리 가족은 항상 행복합니다.

Our family is always happy.

난 책을 읽고 있을 때가 가장 행복해.

I'm happiest when I'm reading.

나는 지구 상에서 가장 행복한 사람이었다.

I was the happiest man on earth.

더 행복했다고 했습니다.

They felt happier.

Common questions

How do you conjugate 행복하다 in Korean?

행복하다 (to be happy) is 행복해요 in the polite 해요체, 행복합니다 in formal 합니다체, 행복해 in casual 반말 and 행복하다 in the plain written style. The past is 행복했어요.

What is the past tense of 행복하다?

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

Is 행복하다 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 행복하여 and 행복하니 but unchanged in 행복합니다.

What TOPIK level is 행복하다?

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.