If 합니다체 is the business suit of Korean, 해요체 is smart-casual — and most of your day is smart-casual. This is the informal-polite register that carries the overwhelming majority of adult conversation: the café, the coworker at lunch, the taxi, the message to an older acquaintance, the chat with a friend's parent. Its ending is -아/어요, and although it ends in the polite 요, it feels warm and personal rather than crisp and distant. If you learn one register well first, make it this one — it is the safest, most useful default in the language.
해요체 is "polite you can live in"
The single most freeing thing to understand about 해요체 is that it is genuinely 존댓말 — fully polite speech — while being nothing like the ceremonial stiffness of 합니다체. That 요 on the end does all the respect-work you need for the vast middle of social life: people you don't know well, people slightly older, shopkeepers, colleagues, acquaintances. It is polite without being formal.
주말에 보통 뭐 해요?
jumare botong mwo haeyo
What do you usually do on weekends?
날씨가 정말 좋아요. 산책할까요?
nalssiga jeongmal joayo. sanchaekalkkayo
The weather's really nice. Shall we take a walk?
Forming the ending: vowel harmony -아/어요
The 해요체 ending attaches to the verb or adjective stem, and which vowel it uses is decided by vowel harmony — a match between the last vowel of the stem and the vowel of the ending.
Rule: if the stem's last vowel is ㅏ or ㅗ, use -아요. Otherwise (ㅓ, ㅜ, ㅣ, ㅡ, and the rest), use -어요.
| Stem's last vowel | Ending | Verb | 해요체 | Reading |
|---|---|---|---|---|
| ㅏ | -아요 | 살다 (live) | 살아요 | sarayo |
| ㅗ | -아요 | 좋다 (be good) | 좋아요 | joayo |
| ㅓ | -어요 | 먹다 (eat) | 먹어요 | meogeoyo |
| ㅣ | -어요 | 읽다 (read) | 읽어요 | ilgeoyo |
| ㅜ | -어요 | 웃다 (laugh) | 웃어요 | useoyo |
저는 지금 신촌에 살아요.
jeoneun jigeum sinchone sarayo
I live in Sinchon these days.
아침에는 보통 빵을 먹어요.
achimeneun botong ppang-eul meogeoyo
In the morning I usually eat bread.
The logic behind harmony is ancient euphony — bright vowels (ㅏ, ㅗ) group with the bright ending -아, dark vowels group with the dark -어 — and once your ear adjusts, the harmonic choice starts to feel automatic. English has no equivalent; we never change a verb ending to "match" the vowel already in the stem.
하다 verbs become 해요
Any verb built on 하다 ("do") — and there are thousands (공부하다, 사랑하다, 죄송하다, 시작하다) — takes an irregular -여요 that always contracts to 해요.
요즘 한국어를 공부해요.
yojeum hangugeoreul gongbuhaeyo
I'm studying Korean these days.
죄송해요, 조금 늦어요.
joesonghaeyo, jogeum neujeoyo
Sorry, I'm running a little late.
The copula: -이에요 / -예요
The copula 이다 ("to be") has its own 해요체 shapes: -이에요 after a consonant and -예요 after a vowel. These deserve their own treatment — see -이에요 / -예요 — but you meet them constantly, so know them from the start.
저는 회사원이에요.
jeoneun hoesawon-ieyo
I'm an office worker.
이거 뭐예요?
igeo mwoyeyo
What is this?
The only real difficulty: contractions
Because -아/어요 is a vowel attaching to a vowel-final stem, the two vowels very often fuse. This is the one genuinely fiddly corner of 해요체, and it has its own full page on vowel contractions. A preview of the most common fusions:
| Verb | Stem + ending | Contracts to | Reading |
|---|---|---|---|
| 오다 (come) | 오 + 아요 | 와요 | wayo |
| 보다 (see) | 보 + 아요 | 봐요 | bwayo |
| 쓰다 (write) | 쓰 + 어요 (ㅡ drops) | 써요 | sseoyo |
| 마시다 (drink) | 마시 + 어요 | 마셔요 | masyeoyo |
| 주다 (give) | 주 + 어요 | 줘요 | jwoyo |
| 배우다 (learn) | 배우 + 어요 | 배워요 | baewoyo |
저는 커피 마셔요. 물도 좀 줘요.
jeoneun keopi masyeoyo. muldo jom jwoyo
I'll have coffee. And give me some water too.
버스가 와요! 빨리 뛰어요.
beoseuga wayo! ppalli ttwieoyo
The bus is coming! Run, quick.
One form, four jobs — the mirror image of 합니다체
Here is where 해요체 is exactly the opposite of 합니다체. Where the formal register has four endings for its four moods, 해요체 uses one -아/어요 for all of them — statement, question, command, and proposal. What tells them apart is intonation and context, not the ending.
| Mood | Sentence | What carries it |
|---|---|---|
| Statement | 학교에 가요. | falling intonation |
| Question | 학교에 가요? | rising intonation |
| Command | 학교에 가요. | context (telling you to go) |
| Proposal | 같이 학교에 가요. | context / 같이 ("together") |
우리 이따가 같이 밥 먹어요.
uri ittaga gachi bap meogeoyo
Let's grab a meal together later.
여기 잠깐 앉아요.
yeogi jamkkan anjayo
Have a seat here for a moment.
The trade-off is the reverse of 합니다체's: 해요체 is easier to produce (one ending covers everything) but leans on prosody — you have to carry the mood in your voice, because the grammar won't do it for you. This is why 해요체 barely works in flat, printed contexts where intonation is invisible, and why formal writing prefers 합니다체. The four functions get a dedicated treatment on the one-form, four-functions page.
The 요 is load-bearing
The final 요 is not decoration — it is the entire politeness of the register. Strip it off and 가요 becomes 가, which is 반말 (intimate speech). That is a huge social jump, and you do not get to make it unilaterally: 반말 must be licensed by the relationship (age, closeness, mutual agreement). Dropping 요 with someone who hasn't licensed it — a new acquaintance, an elder, a stranger — reads as abrupt or rude.
어디 가요? 저도 그쪽으로 가요.
eodi gayo? jeodo geujjogeuro gayo
Where are you headed? I'm going that way too.
Common Mistakes
1. Over-using 합니다체 in ordinary conversation. Chatting with a coworker or acquaintance in 합니다체 sounds robotic and distant; 해요체 is the natural register.
❌ 저도 이 카페 자주 옵니다.
Stiff — sounds like a formal report while casually chatting about a café.
✅ 저도 이 카페 자주 와요.
jeodo i kape jaju wayo
I come to this café a lot too.
2. Picking -아요 for a dark-vowel stem. A ㅓ/ㅜ/ㅣ stem takes -어요; 먹다 → 먹어요, never ×먹아요.
❌ 저는 매운 음식을 잘 먹아요.
Incorrect harmony — 먹- (ㅓ) takes -어요.
✅ 저는 매운 음식을 잘 먹어요.
jeoneun maeun eumsigeul jal meogeoyo
I eat spicy food well.
3. Picking -어요 for a bright-vowel stem. A ㅏ/ㅗ stem takes -아요; 좋다 → 좋아요, never ×좋어요.
❌ 이 노래 진짜 좋어요.
Incorrect harmony — 좋- (ㅗ) takes -아요.
✅ 이 노래 진짜 좋아요.
i norae jinjja joayo
This song is really good.
4. Treating 하다 like a regular vowel stem. 하다 verbs don't give ×하아요 or the bookish ×하여요 in speech — they contract to 해요.
❌ 저녁에 운동하아요.
Incorrect — 하다 contracts to 해요.
✅ 저녁에 운동해요.
jeonyeoge undonghaeyo
I exercise in the evening.
5. Dropping the 요 with someone who hasn't licensed 반말. Losing the 요 silently downgrades you into intimate speech.
❌ (처음 만난 윗사람에게) 어디 살아?
Rude — 반말 to an elder you just met.
✅ (처음 만난 윗사람에게) 어디 살아요?
eodi sarayo
Where do you live?
Key Takeaways
- 해요체 is informal-polite 존댓말 — the warm, everyday default for talking with a person, as opposed to the formal, public 합니다체.
- The ending is -아/어요 by vowel harmony: ㅏ/ㅗ stems take -아요 (좋아요), everything else takes -어요 (먹어요); 하다 → 해요.
- Vowel-final stems contract (와요, 봐요, 써요, 마셔요) — the one fiddly part, with its own page.
- One -아/어요 does all four moods, split by intonation and context — the mirror image of 합니다체's four endings.
- The final 요 is load-bearing: drop it and you're in 반말. Keep it consistently with anyone you're being polite to.
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Start learning Korean→Related Topics
- One Ending, Four Jobs: 해요 by IntonationTOPIK 1 — In 해요체 a single -아/어요 form serves as statement, question, command, and proposal — split not by morphology but by intonation and context, which is why Koreans lean on cues like 같이, 좀, and -나요 to keep flat text unambiguous.
- 해요체 vs 합니다체: Which Polite to UseTOPIK 1 — Both raise the listener, so this is a formality-and-distance choice, not a politeness one: 합니다체 is public and on-the-record, 해요체 is warm and conversational, and fluent speakers slide between them mid-interaction rather than picking one for life.
- 해요체 Vowel Contractions (봐요, 와요, 써요)TOPIK 1 — The one genuinely fiddly part of 해요체: how a vowel-final stem fuses with -아/어요 — identical-vowel collapse, the ㅗ/ㅜ and ㅣ glides, the ㅡ change, ㅐ/ㅔ absorption, and 하→해 — and why learning these fused stems here unlocks the past tense and half the connectives.
- 이에요 / 예요: Polite Present (with Casual 이야/야)TOPIK 1 — The everyday polite copula picks its shape from the noun's final sound — 이에요 after a consonant, 예요 after a vowel — and the number-one spelling trap is writing 에요 for 예요; the casual 반말 pair 이야/야 tracks it exactly.
- 합니다체: The Formal Polite Style (-(스)ㅂ니다)TOPIK 1 — The formal-polite declarative -(스)ㅂ니다 — its batchim allomorphy, the ㄹ-drop, the [슴니다] pronunciation trap, and why 합니다체 is a distinct register, not just 'more polite 해요체.'