Korean Spacing Rules (띄어쓰기): Why 아버지가방에들어가신다 Is a Joke, and the Rules That Actually Matter

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Every Korean learner meets 아버지가방에들어가신다 sooner or later. Written without spaces, it can be read two ways, and one of them puts your father in a bag.

It is a good joke and a poor lesson. Han Seong-u, a professor of Korean at Inha University who sits on the committee that reviews Korean language norms, pointed out in a 2024 column for the newspaper Kyunghyang Shinmun that nobody actually misreads the sentence, since fathers do not climb into bags. Careful Korean would also say 아버지께서 방에 들어가신다, with the honorific subject particle 께서, and then there is nothing to misread at all.

The spacing mistakes learners really make are less funny and much more predictable: 할수있어요, 할거예요, 학생 이에요, 먹고싶어요. A handful of rules fix most of them, and in several places the rules let you choose.

The unit of spacing is the 어절, not the English word

The spelling rules start from the principle that each word in a sentence is written separately (Article 2), then make one big exception: particles attach to the word in front of them (Article 41). Verb and adjective endings were never separate words to begin with. So what sits between two spaces is what the Standard Korean Language Dictionary calls an 어절: a segment of a sentence, and the unit of spacing.

저는I + topic 학교에서school + at 친구를friend + object 만났어요met (verb + endings)

Four chunks, three spaces. Particles are shown in pink; the verb and its endings were always one chunk.

English needs six words for that sentence. Korean needs four chunks, because the work that English does with at and with word order is done by particles inside the chunks.

Rule 1: particles and 이다 stick to the word before

However many particles pile up, they stay attached: 집에서도 (at home too), 친구한테만 (only to a friend), and the rule book's own 학교에서처럼 (as at school). The copula 이다 counts as a particle here: the rules list 꽃이다 and 꽃입니다 among their examples. That is why it is 학생이에요, never 학생 이에요.

The particles themselves are covered in Korean particles explained.

Rule 2: after -ㄴ, -는 or -ㄹ, the noun gets its own space

For learners this is the most useful rule, because so much intermediate grammar is built on it. The spelling rules write bound nouns (의존 명사) separately. A bound noun is a real noun that cannot stand alone: it always needs a modifier such as 할, 먹을 or 온 in front of it. The rule's own examples include 아는 것이 힘이다 (knowledge is power) and 나도 할 수 있다 (I can do it too).

Noun	Example	English
수	혼자 할 수 있어요.honja hal su isseoyo	I can do it on my own.
것	먹을 것 좀 있어요?meogeul geot jom isseoyo?	Is there anything to eat?
거spoken 것	내일 할 거예요.naeil hal geoyeyo	I'm going to do it tomorrow.
줄	운전할 줄 알아요?unjeonhal jul arayo?	Do you know how to drive?
지	한국에 온 지 3년 됐어요.hanguge on ji samnyeon dwaesseoyo	It's been three years since I came to Korea.
적	제주도에 가 본 적이 있어요?jejudoe ga bon jeogi isseoyo?	Have you ever been to Jeju?
때	시간 있을 때 연락하세요.sigan isseul ttae yeollakaseyo	Get in touch when you have time.

The future -(으)ㄹ 거예요 is easy to get wrong because it is usually learned as one block. But 거 is simply the spoken form of 것, and the dictionary lists it as a bound noun, so it is spaced exactly like 것: 할 거예요, 비가 올 것 같아요 (it looks like rain).

Endings that only look like a noun

Some endings start with ㄹ or ㄴ and carry on into another syllable, but they are single endings. No particle can go inside them, so they attach:

Compare 온 지 3년 (three years since I came: the noun 지, with a space) with 왔는지 (when or whether I came: the ending -는지, no space). 배울수록 contains a 수, but -ㄹ수록 is one ending, so it never splits. The same distinction separates -는데 from -는 데, explained in -는데 in Korean: one ending, five jobs.

Same word, two jobs: 대로, 만큼, 뿐

A few words act as a particle after a noun and as a bound noun after a modifier. The official commentary lists them, and the spacing follows the job:

Word	After a noun: particle, attached	After -ㄴ/-는/-ㄹ: noun, spaced
대로	약속대로yaksokdaero · as promised	약속한 대로yaksokan daero · the way we agreed
만큼	형만큼hyeongmankeum · as much as my brother	먹을 만큼meogeul mankeum · as much as you will eat
뿐	셋뿐setppun · only three	웃을 뿐useul ppun · did nothing but smile

Rule 3: counters take a space after a spelled-out number

Counting units are written separately. With a number spelled out in Hangul, put a space before the counter: 한 개, 두 잔, 세 번, 열 살. After Arabic numerals the rules allow you to attach it: 3개, 2시간, 10명. The official commentary explains that this was allowed because the attached form is easier to read and is what people mostly write. Times, dates and ordinal numbers may be attached as well: 두 시 삼십 분 or 두시 삼십분.

Rule 4: 안 and 못 stand on their own

안 (short for 아니) and 못 are adverbs, so each is a word with its own space: 안 가요, 못 먹어요, 안 좋아요. With noun + 하다 verbs they go right before 하다, still spaced.

The exceptions are words in which 안 or 못 has fused with the verb into a dictionary word with a meaning of its own: 못생기다 (to be ugly), 못되다 (to be mean), 못하다 (to be bad at) and 안되다 (to go badly, or to feel sorry for someone). Two of them come up in the pairs below. Where 안 and 못 go in a sentence is covered in 안 vs 못 vs -지 않아요.

Rule 5: helping verbs, where both spellings are right

This is the place to stop worrying. When a verb in its -아/어 form is followed by a helping verb such as 보다 (try), 주다 (for someone), 버리다 (completely) or 놓다 (in advance), the spelling rules make the space the principle and allow writing them together.

The allowance has limits, all spelled out in the commentary:

• -고 싶다 and -고 있다 are always spaced. Attaching is allowed only after -아/어 and in patterns like 아는 척하다, so 먹고 싶어요 and 먹고 있어요 keep the space.
• Some pairs are single dictionary words. 도와주다 is one word, so it is always 도와주세요, and the commentary adds that 도와드리다 is always written together too.
• A compound or derived main verb keeps the space, because the joined form would get too long: only 공부해 보세요, never 공부해보세요. The exception is a form of just two syllables before the helper: 구해 봐요 or 구해봐요 (from 구하다, to look for), 나가 버렸어요 or 나가버렸어요.
• A particle in between forces the space: 먹어도 봤어요 (I even tried it).
• -아/어하다 and -아/어지다 are always attached (예뻐해요, 지워져요), except after a whole phrase: 먹고 싶어 해요.

One space, two meanings

These are the cases where the space really does change the meaning. Each pair is listed in the Standard Korean Language Dictionary.

한번 or 한 번

한 번 with a space is the number one plus the counter 번: once. 한번 written as one word is an adverb meaning “give it a try” or “some time”. The dictionary's test: replace it with 두 번 (twice). If the sentence still makes sense, write 한 번.

할게 or 할 게

-ㄹ게 is a single ending for a promise, so it attaches. 할 게 with a space is 할 것이 squeezed together: a modifier plus the noun 것. The dictionary entry for -ㄹ게 points out this exact pair.

큰집 or 큰 집

안되다 or 안 되다

The dictionary has two words 안되다: a verb meaning “to go badly”, whose opposite is 잘되다, and an adjective meaning “to feel sorry for someone”. When 안 simply means not, as in “not allowed” or “not yet”, it is the adverb with a space.

Two more pairs work the same way. 못하다 (to be bad at) versus 못 하다 (cannot do) is covered in Saying “can” in Korean, and -는데 versus -는 데 in the -는데 guide.

Names and titles

A family name and a given name are written together, and whatever is added to the name, such as 씨, a job title or a form of address, takes a space: 김민지 씨, 민지 씨, 김 선생님. 님 after a name works like a politer 씨 and is spaced too (민지 님), but the -님 on a title such as 선생님 or 사장님 is a suffix and attaches. The one allowance is for names whose family name could be misread: with a two-syllable surname such as 남궁, the rules accept 남궁 억 as well as 남궁억 (Article 48).

Where the rules let you choose

A lot of the stress around spacing comes from assuming that every space is fixed. The spelling standard marks a principle (원칙) and an allowed alternative (허용) in several places, and both are correct:

In the first row the allowed form is the everyday one: the commentary itself notes that people mostly write 3개 and 2시간, so there is no need to space digits to look careful.

That flexibility fits the headline of Han's column, 규정보다 소통이 먼저다, “communication comes before the rules”. Korean, after all, managed without spaces for most of its history.

Frequently asked questions

What are the basic rules of Korean spacing?

Write each word together with its particles and endings as one chunk (an 어절) and put a space between chunks. Particles and 이다 attach to the word before (학생이에요). A noun after -ㄴ, -는 or -ㄹ takes a space (할 수 있어요, 할 거예요, 온 지 3년). A counter after a spelled-out number takes a space (한 개, 두 잔). 안 and 못 stand alone (안 가요), and 씨 after a name is spaced (민지 씨).

Is it 할 수 있어요 or 할수있어요?

할 수 있어요. 수 is a bound noun, and Article 42 of the Korean spelling rules writes bound nouns separately; the rule's own example is 나도 할 수 있다. Writing it as one block, 할수있다, follows North Korean spelling norms, not the South Korean standard.

Is it 할 거예요 or 할거예요?

할 거예요. 거 is the spoken form of the bound noun 것, and the Standard Korean Language Dictionary lists it as a bound noun, so it takes a space after a modifier, exactly like 것: 할 거예요, 비가 올 것 같아요.

Is it 먹어 보다 or 먹어보다?

Both are correct. Article 47 makes the spaced form (먹어 보다) the principle and allows the attached form (먹어보다). The allowance does not cover -고 싶다 or -고 있다, so 먹고 싶어요 and 먹고 있어요 always keep the space.

Why is 3년 written without a space?

Counters are normally spaced (삼 년, 한 개), but Article 43 allows them to be attached after Arabic numerals: 3년, 10개, 2시간. The official commentary says this was allowed because the attached form is easier to read and is what people mostly write.

What is the difference between 한번 and 한 번?

한 번 with a space means once: 하루에 한 번 드세요 (take it once a day). 한번 as one word means give it a try or some time: 한번 먹어 보세요, 언제 한번 만나요. Test: replace it with 두 번. If the sentence still makes sense, write 한 번.

What does 아버지가방에들어가신다 mean?

It is a famous spacing joke. Spaced as 아버지가 방에 들어가신다 it means Father is going into the room; spaced as 아버지 가방에 들어가신다 it means Father is getting into the bag. In practice nobody misreads it, and careful Korean would say 아버지께서 방에 들어가신다 anyway.

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