The -는 것 Nominalizer (the general-purpose one) | Korean Grammar

Of Korean's three nominalizers, -는 것 is the one you can lean on. -기 is choosy about its collocations, -(으)ㅁ is formal and written — but -는 것 is the neutral, everyday, spoken default. It turns any clause into a noun phrase: take the clause, end it in an attributive ending, and add 것. 운동하다 ("exercise") becomes 운동하는 것 ("exercising / the act of exercising"), which you can then make the subject or object of a bigger sentence. It is the closest Korean gets to the English gerund and to "the fact that…," and when you are unsure which nominalizer to use, -는 것 is almost always safe.

From clause to noun: attach the attributive + 것

The recipe never changes: put the verb in its attributive form and stick 것 on the end. The clause now behaves as a single noun phrase and takes ordinary particles.

책을 읽는 것이 재미있어요.

chaegeul ingneun geosi jaemi-isseoyo

Reading books is fun.

Here the whole clause 책을 읽는 ("reading books") is nominalized by 것 into a subject, marked with 이 (것이 → [거시]). The predicate 재미있어요 comments on that activity. English does this with the -ing gerund; Korean does it with -는 것.

운동하는 것이 건강에 좋아요.

undonghaneun geosi geongang-e joayo

Exercising is good for your health.

This 것 is the propositional cousin of the referential 것 on 것 head-noun clauses: there 내가 산 것 is "the thing I bought" (a physical thing); here 운동하는 것 is "exercising" (an event packaged as a noun). Same word, two jobs.

The tense lives on the attributive

Because 것 sits behind a normal attributive ending, that ending still carries the tense of the nominalized clause. Get it right and you can nominalize past, present, and future events cleanly:

Attributive + 것	Tense	Meaning
하는 것	present	doing / the doing of
한 것	past	having done / that … did
할 것	prospective	going to do / the thing to do

A past nominalization — the event is completed:

그가 온 것을 봤어요.

geuga on geoseul bwasseoyo

I saw that he had come.

A prospective one — the thing yet to be done:

지금 제일 먼저 할 게 뭐예요?

jigeum jeil meonjeo hal ge mwoyeyo

What's the first thing to do right now?

Note that adjectives, which use -(으)ㄴ for their present attributive, nominalize the same way (좋은 것 "a good thing / being good"). The attributive machinery is shared with all of Korean's modifiers before nouns.

Perceived events: "I heard the baby crying"

-는 것 is how Korean packages an event so a perception verb (보다 see, 듣다 hear, 느끼다 feel) can take it as an object — "I saw/heard [that X was happening]."

아기가 우는 것을 들었어요.

agiga uneun geoseul deureosseoyo

I heard the baby crying.

그가 거짓말하는 걸 봤어요.

geuga geojinmalhaneun geol bwasseoyo

I caught him lying.

The perceived clause keeps its own subject (아기가, 그가), gets nominalized by 것, and is handed to 듣다/보다 as an object. English uses either a gerund ("heard him crying") or a that-clause ("saw that he was lying"); Korean uses -는 것 for both.

Liking and knowing an activity

-는 것 also lets a whole activity be the object of verbs like 좋아하다 (like), 싫어하다 (dislike), 알다 (know), and 모르다 (not know). With 좋아하다, -는 것 frames a specific instance or personal habit — "the doing of it, in my case":

저는 요리하는 걸 좋아해요.

jeoneun yorihaneun geol joahaeyo

I like cooking.

Here -는 것 and the activity-noun -기 overlap: 요리하기를 좋아해요 is equally fine, with -기 leaning more toward the generic activity and -는 것 toward the concrete habit. When the object is a fact you know, though, -는 것 (or -다는 것) is the natural choice, not -기:

저는 그가 매일 운동하는 것을 알아요.

jeoneun geuga mae-il undonghaneun geoseul arayo

I know that he exercises every day.

The spoken default — and its contractions

In conversation, -는 것 is not a fancy structure — it is how people constantly talk, and 것 contracts exactly as it does everywhere: 것이 → 게, 것을 → 걸, 것은 → 건, 것이다 → 거예요.

일찍 자는 게 좋아요.

iljjik janeun ge joayo

Going to bed early is better.

매일 조금씩 공부하는 게 최고예요.

mae-il jogeumssik gongbuhaneun ge choegoyeyo

Studying a little every day is the best.

여기서 담배 피우는 것은 금지예요.

yeogiseo dambae piuneun geoseun geumjiyeyo

Smoking here is prohibited.

💡

When you're unsure whether to nominalize with -기, -(으)ㅁ, or -는 것, reach for -는 것 (usually contracted to 게/걸/건 in speech). It is the safe, natural, register-neutral choice — you will rarely be wrong, whereas -(으)ㅁ risks sounding stiff and -기 is locked to specific collocations.

It also underlies the cleft

Because -는 것 nominalizes so freely, it feeds the explanatory/focus frame -는 것이다 ("the thing is that…," "it's that…"). 제가 하고 싶은 건 이거예요 ("what I want is this") is a -는 것 nominal plugged into a copula — the beginning of the cleft, which gets its own treatment on the -는 것은 …이다 cleft.

Common Mistakes

1. Dropping 것 and leaving a bare attributive. The clause must land on 것 to become a noun; without it, there is no subject for the main verb.

❌ 운동하는 중요해요.

Wrong — 운동하는 modifies nothing; you need the nominalizer 것 (게).

✅ 운동하는 게 중요해요.

undonghaneun ge jung-yohaeyo

Exercising is important.

2. Freezing on 하는 것 and ignoring tense. The attributive carries the tense, so a completed event is 온 것 (past), not 오는 것 (present).

❌ 그가 오는 것을 봤어요.

Says 'I saw him coming' — for the completed arrival you need the past 온 것.

✅ 그가 온 것을 봤어요.

geuga on geoseul bwasseoyo

I saw that he had come.

3. Over-reaching for formal -(으)ㅁ in speech. In conversation, use -는 것 (게), not the written -(으)ㅁ.

❌ 일찍 자는 것이 좋음.

Reads like a notice-board fragment — in speech it's 자는 게 좋아요.

✅ 일찍 자는 게 좋아요.

iljjik janeun ge joayo

It's better to go to bed early.

4. Not contracting in speech. 것이 / 것을 / 것은 spoken in full sound bookish; natives say 게 / 걸 / 건.

❌ 매일 공부하는 것이 최고예요.

Grammatically fine but stiff aloud — a native contracts 것이 to 게.

✅ 매일 공부하는 게 최고예요.

mae-il gongbuhaneun ge choegoyeyo

Studying every day is the best.

Key Takeaways

-는 것 turns any clause into a noun phrase — the neutral, everyday, spoken default nominalizer, and Korean's nearest thing to the English gerund and "the fact that…."
The tense sits on the attributive: 하는 것 (present) / 한 것 (past) / 할 것 (prospective); adjectives use -(으)ㄴ (좋은 것).
It packages perceived events for 보다/듣다/느끼다 (우는 것을 들었어요) and contracts to 게/걸/건/거예요 in speech.
When in doubt, choose -는 것 over -기 or -(으)ㅁ; it also underlies the 것이다 cleft.

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