충실하다 Korean adjective conjugation
to be faithful
Every form of 충실하다 across the four speech levels. It is 여 irregular — 하다 and every verb built on it: 하다 → 하여 → 해요.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 충실한
- 아/어Infinitive
- 충실해
- -으니Since
- 충실하니
- 합니다Formal
- 충실합니다
현재Present
The tense that does the most work. 해요체 is the one to learn first — it is polite without being formal, and it is what most conversation is in.
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 충실해요 | 충실합니다 | 충실해 | 충실하다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 충실했어요 | 충실했습니다 | 충실했어 | 충실했다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 충실하겠어요 | 충실하겠습니다 | 충실하겠어 | 충실하겠다 |
| -을 것이다Going to | 충실할 거예요 | 충실할 것입니다 | 충실할 거야 | 충실할 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 충실해요? | 충실합니까? | 충실해? | 충실하니? |
| 과거Past | 충실했어요? | 충실했습니까? | 충실했어? | 충실했니? |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 충실해요 | 안 충실합니다 | 안 충실해 | 안 충실하다 |
| -지 않다Not (long) | 충실하지 않아요 | 충실하지 않습니다 | 충실하지 않아 | 충실하지 않다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 충실하세요 | 충실하십니다 | 충실하셔 | 충실하시다 |
| 과거Past | 충실하셨어요 | 충실하셨습니다 | 충실하셨어 | 충실하셨다 |
관형사형Modifying a noun
- 현재Present
- 충실한
- 과거Past
- 충실한
- 미래Future
- 충실할
- 회상Used to
- 충실하던
연결Joining clauses
- -고and
- 충실하고
- -게-ly / so that
- 충실하게
- -어서so / and then
- 충실해서
- -으니까since
- 충실하니까
- -으면if / when
- 충실하면
- -지만but
- 충실하지만
- -는데and / but (setting up)
- 충실한데
- -어도even if
- 충실해도
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 2에/에게 충실하다
예문In real sentences
From the dictionary, each with its translation.
그 순간에 충실하세요.
I mean, be present.
이 순간에 충실한다는 게 무슨 뜻인지 다들 아시잖아요.
You and I know exactly what it means like to be truly present in a moment.
우린 말 없이 거부하는 것은 불충실한 것이라고 말하죠.
And we say, "To disagree silently is disloyal."
여느 충실한 아버지처럼, 그는 선물을 가지고 과테말라의 집으로 돌아왔어요.
And like any dutiful father, he returned home to Guatemala, bearing gifts.
자주 묻는 질문Common questions
How do you conjugate 충실하다 in Korean?
충실하다 (to be faithful) is 충실해요 in the polite 해요체, 충실합니다 in formal 합니다체, 충실해 in casual 반말 and 충실하다 in the plain written style. The past is 충실했어요.
What is the past tense of 충실하다?
충실했어요 in everyday polite speech, 충실했습니다 formally. It is built from the 아/어 form 충실하여 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 충실하다 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 충실하여 and 충실하니 but unchanged in 충실합니다.
What TOPIK level is 충실하다?
5급 — TOPIK 5, advanced.
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.