The ㄷ irregular is easy to state — ㄷ becomes ㄹ before a vowel — but it hides a genuinely tricky fact: you cannot tell from a verb's spelling whether it is irregular. Two verbs can be written identically, pronounced identically in their dictionary form, and still conjugate differently, because ㄷ-class membership is decided by the word's meaning, not by any sound you can hear. This page draws that boundary. It covers the two notorious homograph pairs and the everyday ㄷ verbs that are perfectly regular.
For an English speaker, the closest analogy is a pair like lie (recline: lay, lain) versus lie (tell an untruth: lied) — same spelling, same base pronunciation, different past tense chosen by meaning. Korean has exactly this situation with 걷다 and 묻다, and getting the sense wrong produces a real, meaning-changing error.
The two homograph pairs
걷다 — walk (irregular) vs roll up / take in (regular)
| Verb | Meaning | Class | 해요 form |
|---|---|---|---|
| 걷다 | walk | irregular | 걸어요 |
| 걷다 | roll up (sleeves); take in (laundry); clear up | regular | 걷어요 |
The "walk" verb mutates (걸어요, 걸으면), following the pattern from the previous page. The other 걷다 — the one you use for rolling up your sleeves, bringing the laundry in off the line, or fog lifting — is a plain regular verb: the ㄷ stays, and the ending simply liaises onto it (걷어요, pronounced 거더요).
공원을 한 바퀴 걸었어요.
gong-woneul han bakwi georeosseoyo
I walked one lap around the park. (walk — irregular)
비가 와서 빨래를 걷었어요.
biga waseo ppallaereul geodeosseoyo
It started raining, so I took the laundry in. (take in — regular)
더워서 소매를 걷어 올렸어요.
deowoseo somaereul geodeo ollyeosseoyo
It was hot, so I rolled up my sleeves. (roll up — regular)
Hear the minimal pair: 걸었어요 ("walked") mutates, 걷었어요 ("took in") does not.
묻다 — ask (irregular) vs bury (regular)
| Verb | Meaning | Class | 해요 form |
|---|---|---|---|
| 묻다 | ask (a question) | irregular | 물어요 |
| 묻다 | bury; get (dirt) on something | regular | 묻어요 |
모르는 건 선생님한테 물어보세요.
moreuneun geon seonsaengnimhante mureoboseyo
Ask the teacher about anything you don't know. (ask — irregular)
강아지가 마당에 뼈를 묻었어요.
gang-ajiga madang-e ppyeoreul mudeosseoyo
The puppy buried a bone in the yard. (bury — regular)
The fully regular ㄷ verbs
Most ㄷ-final verbs are regular — they keep their ㄷ in front of every ending, vowel or consonant, and the vowel ending just liaises onto the ㄷ. These are extremely common, and the safest habit is to treat any unfamiliar ㄷ verb as regular unless you recognize it from the short irregular list.
| Dictionary form | Meaning | 해요 form | Pronounced |
|---|---|---|---|
| 받다 | receive | 받아요 | 바다요 |
| 닫다 | close | 닫아요 | 다다요 |
| 믿다 | believe | 믿어요 | 미더요 |
| 얻다 | obtain / get | 얻어요 | 어더요 |
| 묻다 | bury | 묻어요 | 무더요 |
| 쏟다 | spill / pour out | 쏟아요 | 쏘다요 |
어제 친구한테서 선물을 받았어요.
eoje chinguhanteseo seonmureul badasseoyo
I got a present from a friend yesterday.
추우니까 창문 좀 닫아 주세요.
chuunikka changmun jom dada juseyo
It's cold, so please close the window.
저는 그 사람 말을 안 믿어요.
jeoneun geu saram mareul an mideoyo
I don't believe that person's word.
인터넷에서 좋은 정보를 많이 얻어요.
inteoneseseo joeun jeongboreul mani eodeoyo
I get a lot of good information off the internet.
커피를 책상에 쏟아 버렸어요.
keopireul chaeksang-e ssoda beoryeosseoyo
I spilled coffee all over the desk.
The heuristic: memorize the short irregular list
Because the difference is inaudible in the dictionary form and invisible in the spelling, there is no phonological shortcut — this is honest rote memory. The good news is that the irregular side is the short, closed list; everything else is regular. Learn these as "the ㄷ verbs that mutate":
- 듣다 (listen), 싣다 (load), 깨닫다 (realize), 붇다 (swell)
- 걷다 in the sense "walk" only
- 묻다 in the sense "ask" only
If a ㄷ verb is not on that list — 받다, 닫다, 믿다, 얻다, 쏟다, and the "bury/roll-up" senses of 묻다/걷다 — assume it is regular and keep the ㄷ.
Common Mistakes
1. Conjugating regular 받다 as if it were irregular. This is the classic overgeneralization from 듣다 → 들어요.
❌ 월급을 바라요.
Incorrect for 'receive' — 받다 is regular: 받아요. (바라요 is 바라다, 'to hope for'.)
✅ 월급을 받아요.
wolgeubeul badayo
I receive my salary.
2. Making 닫다 mutate. "Close" keeps its ㄷ.
❌ 문을 다라 주세요.
Incorrect — 닫다 is regular; the ㄷ stays: 닫아 주세요.
✅ 문을 닫아 주세요.
muneul dada juseyo
Please close the door.
3. Mixing up the two 묻다 senses. "Bury" is regular (묻어요); using the "ask" stem changes the meaning.
❌ 마당에 씨앗을 물어요.
Incorrect for 'bury' — that's the 'ask' stem. Bury = 묻어요.
✅ 마당에 씨앗을 묻어요.
madang-e ssiaseul mudeoyo
I bury the seeds in the yard.
4. Mixing up the two 걷다 senses. "Take in the laundry" is regular (걷어요); the "walk" stem (걸어요) would say something else entirely.
❌ 빨래를 걸어요.
Incorrect for 'take in laundry' — 걸어요 is 'walk' (or 걸다 'hang'). Take in = 걷어요.
✅ 빨래를 걷어요.
ppallaereul geodeoyo
I take in the laundry.
5. Treating 믿다 or 얻다 as irregular. Neither mutates.
❌ 저는 당신을 미러요.
Incorrect — 믿다 is regular: 믿어요 (미더요).
✅ 저는 당신을 믿어요.
jeoneun dangsineul mideoyo
I believe you.
Key Takeaways
- ㄷ-class membership is lexical, decided by meaning, and it is not visible in the spelling.
- 걷다 and 묻다 each have an irregular sense (walk / ask → 걸어요, 물어요) and a regular sense (roll up–take in / bury → 걷어요, 묻어요).
- The everyday ㄷ verbs 받다, 닫다, 믿다, 얻다, 쏟다 are all regular — the ㄷ stays and the ending liaises onto it.
- The reliable strategy: memorize the short irregular list (듣다, 싣다, 깨닫다, 붇다, 걷다-walk, 묻다-ask) and default everything else to regular.
- Store each irregular by its 해요 form (들어요, 물어요), so you never bleed the pattern onto a regular verb.
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Start learning Korean→Related Topics
- The ㄷ Irregular: 듣다 → 들어요TOPIK 2 — How stem-final ㄷ mutates to ㄹ before a vowel- or 으-initial ending — 듣다 → 들어요, 들으면, 들으세요 — while staying put before consonant endings (듣고, 듣는).
- Irregular Predicates at a Glance (Reference Table)TOPIK 2 — One-screen reference for all eight irregular classes — the trigger, the change, a model verb with its 아/어-form and 으-form, and a regular look-alike to guard against over-generalizing each class.
- ㅂ Exceptions (돕다·곱다 → 도와/고와) and Regular ㅂ VerbsTOPIK 2 — The only two ㅂ-irregulars that go to 와 instead of 워 — 돕다 and 곱다 — plus the crucial boundary between irregular and regular ㅂ stems, which you cannot read off the spelling.
- Regular vs Irregular Predicates: The Big PictureTOPIK 1 — The seven irregular predicate classes are not chaos — each is a small, predictable sound change keyed to the stem's FINAL letter, and adjectives conjugate by the exact same machinery as verbs.