Verbseoul.
ㄹ stem

뛰어들다 conjugation (ttwieodeulda, to run, to rush)

To say to run, to rush politely in the present tense, use 뛰어들어요 (ttwee-uh-deu-ruh-yoh) · ttwieodeureoyo. Below is the full conjugation of 뛰어들다 across the three tenses and three everyday speech levels.

Grammar note (ㄹ stem): ㄹ-stem verbs end in ㄹ as the final consonant. They are conjugated regularly with vowel suffixes (살다 → 살아요), but the ㄹ drops before certain consonant suffixes — specifically before ㄴ, ㅂ, ㅅ, and before the formal ending 습니다: 살다 → 사는, 삽니다, 살지 (ㄹ kept before ㅈ). This is sometimes called a "ㄹ drop" or "ㄹ irregular." See all ㄹ-stem verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
뛰어들어
ttwee-uh-deu-ruh
ttwieodeureo
뛰어들어요
ttwee-uh-deu-ruh-yoh
ttwieodeureoyo
뛰어듭니다
ttwee-uh-deum-nee-dah
ttwieodeumnida
Past
뛰어들었어
ttwee-uh-deu-ruh-ssuh
ttwieodeureosseo
뛰어들었어요
ttwee-uh-deu-ruh-ssuh-yoh
ttwieodeureosseoyo
뛰어들었습니다
ttwee-uh-deu-ruh-sseum-nee-dah
ttwieodeureosseumnida
Future
뛰어들 거야
ttwee-uh-deul guh-yah
ttwieodeul geoya
뛰어들 거예요
ttwee-uh-deul guh-yae-yoh
ttwieodeul geoyeyo
뛰어들 겁니다
ttwee-uh-deul guhm-nee-dah
ttwieodeul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
뛰어드세요
ttwee-uh-deu-sae-yoh
ttwieodeuseyo
Suggestion / Let's Polite (요)
뛰어들어요
ttwee-uh-deu-ruh-yoh
ttwieodeureoyo
Question Polite (요)
뛰어들어요?
ttwee-uh-deu-ruh-yoh-?
ttwieodeureoyo?
Connective "and" — (고)
뛰어들고
ttwee-uh-deul-goh
ttwieodeulgo
Conditional "if" — (면)
뛰어들면
ttwee-uh-deul-myuhn
ttwieodeulmyeon
Progressive (고 있어요)
뛰어들고 있어요
ttwee-uh-deul-goh ee-ssuh-yoh
ttwieodeulgo isseoyo
Want to (고 싶어요)
뛰어들고 싶어요
ttwee-uh-deul-goh shee-puh-yoh
ttwieodeulgo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
뛰어들 수 있어요
ttwee-uh-deul soo ee-ssuh-yoh
ttwieodeul su isseoyo
Because / So (아/어서)
뛰어들어서
ttwee-uh-deu-ruh-suh
ttwieodeureoseo
Noun form — (기)
뛰어들기
ttwee-uh-deul-gee
ttwieodeulgi
Noun form — (음)
뛰어듦
ttwee-uh-deum
ttwieodeum