Languages

Korean grammar you need on day one

By Ren · Updated October 20, 2026

Korean is not hard so much as differently shaped. Four structural facts explain most of what feels strange, and knowing them upfront turns confusion into pattern-matching.

1. The verb goes last

Korean is subject–object–verb. "I coffee drink." Everything that modifies something comes before it, all the way down. This means you often cannot know what a sentence is about until the very end — which is exactly why listening feels hard at first.

Practical consequence: stop translating as you hear. Wait for the verb.

2. Particles mark the job of each word

Instead of relying on position, Korean attaches a small particle to each noun to say what role it plays:

The 은/는 versus 이/가 distinction is the classic sticking point and it is not worth solving in month one. Use 은/는 as a default, notice the contrast over time.

3. Politeness is built into the verb

This is not optional decoration. The ending changes depending on who you are speaking to.

• -요 form — polite, everyday. Learn this one first. It is correct in almost every situation a learner will be in.
• -습니다 form — formal. Announcements, news, business.
• plain form — casual, for close friends and people younger than you. Using it wrongly is genuinely rude, so leave it until you know the social rules.

Dramas are mostly casual speech between close characters. Copying them directly is a common and awkward mistake.

Banmal vs jondaetmal: casual or polite?

Koreans sort all of this into two everyday words. 존댓말 (jondaetmal) is polite speech: the -요 and -습니다 endings above, plus honorific words. The dictionary entry lists 선생님, 진지 and 드리다 among them. 반말 (banmal, literally "half speech") is the casual form, usually the polite ending with the -요 cut off: 고마워요 becomes 고마워, 먹어요 becomes 먹어.

The cost of a mistake runs in two directions, and they are not equal. 존댓말 to someone close can come across as socially awkward or emotionally distant; 반말 to a stranger or acquaintance is perceived as rude. Distance is easy to fix later. Rudeness is not.

Who gets which

"People younger than you" in the list above means younger people you know. Polite endings are expected with strangers and acquaintances regardless of their age or social status, pre-teen children being the exception.

Because the line usually falls on age, Koreans ask about it early. It is common to frequently ask people about their age, and speakers choose honorifics by whether the other person's year of birth is before, the same as or after their own. Al Jazeera's explainer on South Korea's switch to international age counting, which took effect on 28 June 2023, summed up anthropologist Mo Hyun-joo's view: age "dictates which titles and honorifics one must use for others". A question about your age on a first meeting is usually this calculation, not nosiness.

K-drama scenes, decoded

Dramas turn speech level into plot, which makes them good teachers once you know what to look for. Five scenes of the kind they keep returning to (the lines are typical, not quoted from a particular show):

• The stand-off. A stranger talks down to the lead, who snaps back: 언제 봤다고 반말이세요? (eonje bwatdago banmariseyo?, "since when do we know each other well enough for 반말?"). The scene works because everyone watching knows unasked 반말 to an adult is the provocation.
• The age check. Two new colleagues compare birth years: 어, 동갑이네요! 우리 말 놓을까요? (eo, donggabineyo! uri mal noeulkkayo?, "Oh, we're the same age! Shall we drop the formal speech?"). The switch is proposed and agreed out loud.
• The one-way street. The team leader says 이거 내일까지 해 줘 (igeo naeilkkaji hae jwo, "get this done by tomorrow"); the junior answers 네, 알겠습니다 (ne, algetseumnida, "yes, understood"). Being spoken to in 반말 by someone senior is not permission to answer in it.
• The romance turn. The leads use -요 for episodes, and the moment one says 우리 이제 말 놓을까? (uri ije mal noeulkka?, "shall we talk casually now?") is a beat in the relationship. That is why switching unprompted feels presumptuous.
• The cold polite. After a fight, a couple who always use 반말 snap into -요: 알겠어요. 먼저 갈게요 (algesseoyo. meonjeo galgeyo, "Fine. I'll go first."). Polite speech to someone close signals distance, and in a lighter scene the same switch can be playful or sarcastic instead.

The safe default: a checklist

• Use -요 with every adult until both of you have agreed otherwise. It is also the style most phrasebooks for foreigners use, for its simplicity and proper politeness.
• Use -습니다 for set pieces: introducing yourself to a group, an interview, the first lines with someone senior. A conversation with a stranger generally starts in this style and gradually fades into -요.
• Do not mirror 반말. If someone uses it with you, keep answering in -요 until they invite you to switch.
• Drop 너 ("you"). It is a 반말 word, and second-person pronouns are generally left out of polite speech. Use the person's name + 씨 for a peer, or a title such as 선생님 or 사장님.
• Learn drama lines in two versions. When a line you like is 반말 (보고 싶어, "I miss you"), learn the -요 version too (보고 싶어요) and use that one.
• Fix slips on the spot. Say 아, 죄송해요 ("oh, sorry"), then repeat the sentence with -요.
• Unsure mid-conversation? Go back to -요. Too polite reads as distant. Too casual reads as rude.

Switching to banmal: the script

The agreement even has a slang word: 반모, which the Urimalsaem dictionary lists as short for 반말 모드 ("banmal mode"). Speech level is also an error that is hard to catch alone, because the sentence is grammatical; it just does not fit the person. If you practise speaking with a Korean tutor, ask them to stop you every time an ending does not fit.

4. There are two number systems

Yes, telling the time uses both — native for the hour, Sino for the minutes. Drill that one case specifically; it is where people freeze.

Learning words in themes

Isolated vocabulary is hard to review because nothing cues it. Groups cue themselves:

• Food — high frequency, immediately usable
• Travel — transport, directions, tickets
• Feelings — the vocabulary that makes dramas understandable
• Time — small, closed, appears in everything

Twenty-five words in each group is a hundred words that all reinforce each other.

Words you already know

A surprising amount of Korean vocabulary is borrowed from English and adapted to Korean sounds. Once you can read hangul you get these almost free — coffee, computer, bus, ice cream, card, camera. Reading practice on signs and menus is unusually rewarding early on for this reason.