Verbseoul.
르 irregular

몰르다 conjugation (molreuda, colloquial and dialectal form of 모르다 (to not know))

To say colloquial and dialectal form of 모르다 (to not know) politely in the present tense, use 몰라요 (mohl-rah-yoh) · molrayo. Below is the full conjugation of 몰르다 across the three tenses and three everyday speech levels.

Grammar note (르 irregular): 르-irregular verbs and adjectives end in 르다. Before the -어/-아 suffix the 르 splits: the ㅡ vowel drops and a ㄹ is added as the final consonant of the preceding syllable. 모르다 (not to know) → 몰라요 (not *모르어요), 부르다 (to call) → 불러요. Before consonant suffixes 르 stays intact: 모르고, 부르지. See all 르-irregular verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
몰라
mohl-rah
molra
몰라요
mohl-rah-yoh
molrayo
몰릅니다
mohl-reum-nee-dah
molreumnida
Past
몰랐어
mohl-rah-ssuh
molrasseo
몰랐어요
mohl-rah-ssuh-yoh
molrasseoyo
몰랐습니다
mohl-rah-sseum-nee-dah
molrasseumnida
Future
몰를 거야
mohl-reul guh-yah
molreul geoya
몰를 거예요
mohl-reul guh-yae-yoh
molreul geoyeyo
몰를 겁니다
mohl-reul guhm-nee-dah
molreul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
몰르세요
mohl-reu-sae-yoh
molreuseyo
Suggestion / Let's Polite (요)
몰라요
mohl-rah-yoh
molrayo
Question Polite (요)
몰라요?
mohl-rah-yoh-?
molrayo?
Connective "and" — (고)
몰르고
mohl-reu-goh
molreugo
Conditional "if" — (면)
몰르면
mohl-reu-myuhn
molreumyeon
Progressive (고 있어요)
몰르고 있어요
mohl-reu-goh ee-ssuh-yoh
molreugo isseoyo
Want to (고 싶어요)
몰르고 싶어요
mohl-reu-goh shee-puh-yoh
molreugo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
몰를 수 있어요
mohl-reul soo ee-ssuh-yoh
molreul su isseoyo
Because / So (아/어서)
몰라서
mohl-rah-suh
molraseo
Noun form — (기)
몰르기
mohl-reu-gee
molreugi
Noun form — (음)
몰름
mohl-reum
molreum