힘쓰다

to strive

Principal parts

관형사형Modifier
힘쓰는
아/어Infinitive
힘써
-으니Since
힘쓰니
합니다Formal
힘씁니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 힘써요힘씁니다힘써힘쓴다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 힘썼어요힘썼습니다힘썼어힘썼다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 힘쓰겠어요힘쓰겠습니다힘쓰겠어힘쓰겠다
-을 것이다Going to 힘쓸 거예요힘쓸 것입니다힘쓸 거야힘쓸 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 힘써요?힘씁니까?힘써?힘쓰니?
과거Past 힘썼어요?힘썼습니까?힘썼어?힘썼니?

Commands

해요체Polite합니다체Formal해체Casual한다체Plain
명령Do it 힘쓰세요힘쓰십시오힘써힘써라
청유Let's 힘써요힘씁시다힘써힘쓰자

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 힘써요안 힘씁니다안 힘써안 힘쓴다
-지 않다Not (long) 힘쓰지 않아요힘쓰지 않습니다힘쓰지 않아힘쓰지 않는다
못Cannot 못 힘써요못 힘씁니다못 힘써못 힘쓴다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 힘쓰세요힘쓰십니다힘쓰셔힘쓰신다
과거Past 힘쓰셨어요힘쓰셨습니다힘쓰셨어힘쓰셨다

Modifying a noun

현재Present
힘쓰는
과거Past
힘쓴
미래Future
힘쓸
회상Used to
힘쓰던

Joining clauses

-고and
힘쓰고
-게-ly / so that
힘쓰게
-어서so / and then
힘써서
-으니까since
힘쓰니까
-으면if / when
힘쓰면
-지만but
힘쓰지만
-는데and / but (setting up)
힘쓰는데
-어도even if
힘써도

In progress

해요체Polite합니다체Formal해체Casual한다체Plain
현재Is doing 힘쓰고 있어요힘쓰고 있습니다힘쓰고 있어힘쓰고 있다
과거Was doing 힘쓰고 있었어요힘쓰고 있었습니다힘쓰고 있었어힘쓰고 있었다

Sentence patterns

In real sentences

어머니들은 자녀들의 교육을 위해 힘쓰고 계시죠.

And our mothers are involved in the education of their own children.

그래서 이것들을 가지고 대륙을 위해 힘쓰는 거죠.

So put these to work for the continent.

대신 평범한 이들이 민주주의적 삶의 중심이 되도록 힘써야합니다.

We must instead work to center ordinary people in democratic life.

공부에 힘쓰다.

He strives for his studies.

Common questions

How do you conjugate 힘쓰다 in Korean?

힘쓰다 (to strive) is 힘써요 in the polite 해요체, 힘씁니다 in formal 합니다체, 힘써 in casual 반말 and 힘쓴다 in the plain written style. The past is 힘썼어요.

What is the past tense of 힘쓰다?

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

Is 힘쓰다 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 힘써 and 힘쓰니 but unchanged in 힘씁니다.

What TOPIK level is 힘쓰다?

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.