In English, politeness lives in word choice. Could you possibly pass the salt versus pass the salt. The verb doesn't change.
In Korean, politeness is built into the verb ending, and every sentence has to pick one. There's no neutral setting. This catches learners off guard, because it means you're making a social decision with every single thing you say.
The three you'll actually meet
Korean textbooks sometimes list seven speech levels. In practice, modern spoken Korean uses three.
해요체 — the 요 form. 가요, 먹어요, 좋아요. Polite but not stiff. This is what you'll hear most in daily life, and it's what a learner should default to.
합니다체 — the formal form. 갑니다, 먹습니다, 좋습니다. Used in announcements, news broadcasts, presentations, military settings, and by service staff. Correct but distant; using it with a friend sounds odd.
반말 — the casual form. 가, 먹어, 좋아. Used with close friends, people clearly younger, and family. Just the 요 form with 요 removed, in most cases.
Learn the 요 form first, thoroughly
If you learn only one, learn 해요체.
It's appropriate with strangers, shopkeepers, coworkers, classmates, and anyone older. It's never rude. At worst it's slightly more polite than needed, which is a harmless place to land.
The formal 합니다 form is worth recognizing when you hear it — announcements and staff will use it with you — but you rarely need to produce it as a beginner.
When you can drop the 요
Here's the part that isn't obvious to English speakers: switching to 반말 isn't just casualness. It's a statement about the relationship.
In most cases it's negotiated, not assumed. A Korean speaker will often ask something like 말 놓아도 될까요? — is it okay if I speak casually? — before switching. That question exists because the switch means something.
Safe to use 반말:
- With close friends your own age, after you've established that
- With children
- Talking to yourself, or in inner monologue
- When the other person has invited it
Not safe:
- With anyone noticeably older, even if they're friendly
- With someone you just met, however casual the setting
- At work with anyone senior to you
- With service staff
The asymmetry matters. An older person may speak 반말 to you while you speak 요 back. That's normal, not an insult, and it doesn't mean you can switch.
What happens if you get it wrong
As a foreign learner, the risk is smaller than you fear. Korean speakers are generally forgiving with learners and won't take offense at a misused ending.
The practical consequence of erring polite is nothing at all. The consequence of erring casual is a moment of awkwardness. So the safe default is obvious.
The one thing to avoid is mixing levels inside one conversation with the same person. Ending one sentence with 요 and the next without reads as unsteady rather than casual.
The mechanics are simpler than the etiquette
The good news: converting between levels is mostly mechanical.
- 요 form → 반말: drop 요.
먹어요→먹어,좋아요→좋아 - 요 form → 합니다 form: different ending, but a regular pattern
The hard part isn't conjugation. It's knowing which to use, and that's social knowledge picked up from watching real interactions.
This is one reason story-based material helps here — you see who is speaking to whom, and the ending follows from the relationship rather than from a chart.
The short version
- Default to the 요 form; it's correct in almost every situation you'll be in
- Recognize 합니다 when you hear it, don't worry about producing it yet
- Don't switch to 반말 until the relationship makes it clear, or you're invited
- Erring polite costs nothing
K-PATTO shows expressions in context, so you see which speech level a character uses and why — with audio for each form, inside webtoon scenes.