크다

to be big, large

Principal parts

관형사형Modifier
큰
아/어Infinitive
커
-으니Since
크니
합니다Formal
큽니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 커요큽니다커크다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 컸어요컸습니다컸어컸다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 크겠어요크겠습니다크겠어크겠다
-을 것이다Going to 클 거예요클 것입니다클 거야클 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 커요?큽니까?커?크니?
과거Past 컸어요?컸습니까?컸어?컸니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 커요안 큽니다안 커안 크다
-지 않다Not (long) 크지 않아요크지 않습니다크지 않아크지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 크세요크십니다크셔크시다
과거Past 크셨어요크셨습니다크셨어크셨다

Modifying a noun

현재Present
큰
과거Past
큰
미래Future
클
회상Used to
크던

Joining clauses

-고and
크고
-게-ly / so that
크게
-어서so / and then
커서
-으니까since
크니까
-으면if / when
크면
-지만but
크지만
-는데and / but (setting up)
큰데
-어도even if
커도

Sentence patterns

In real sentences

큰 일을 할 때이고

It's time to do something big.

큰 사람

a great person

큰 거인 것 같다

It must be one hairy dump.

아니다, 크면 알게 될 거다

Nothing. You'll find out when you grow up.

Common questions

How do you conjugate 크다 in Korean?

크다 (to be big, large) is 커요 in the polite 해요체, 큽니다 in formal 합니다체, 커 in casual 반말 and 크다 in the plain written style. The past is 컸어요.

What is the past tense of 크다?

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

Is 크다 irregular?

Yes — it is 으 irregular (으 불규칙). The stem 으 drops before a vowel ending: 쓰다 → 써요. That is why the stem looks different in 커 and 크니 but unchanged in 큽니다.

What TOPIK level is 크다?

1급 — TOPIK 1, beginner.

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.