Verbseoul.
ㄹ stem

떨다 conjugation (tteolda, to shake, to shiver, to tremble, to shudder)

To say to shake, to shiver, to tremble, to shudder politely in the present tense, use 떨어요 (ttuh-ruh-yoh) · tteoreoyo. Below is the full conjugation of 떨다 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
떨어
ttuh-ruh
tteoreo
떨어요
ttuh-ruh-yoh
tteoreoyo
떱니다
ttuhm-nee-dah
tteomnida
Past
떨었어
ttuh-ruh-ssuh
tteoreosseo
떨었어요
ttuh-ruh-ssuh-yoh
tteoreosseoyo
떨었습니다
ttuh-ruh-sseum-nee-dah
tteoreosseumnida
Future
떨 거야
ttuhl guh-yah
tteol geoya
떨 거예요
ttuhl guh-yae-yoh
tteol geoyeyo
떨 겁니다
ttuhl guhm-nee-dah
tteol geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
떠세요
ttuh-sae-yoh
tteoseyo
Suggestion / Let's Polite (요)
떨어요
ttuh-ruh-yoh
tteoreoyo
Question Polite (요)
떨어요?
ttuh-ruh-yoh-?
tteoreoyo?
Connective "and" — (고)
떨고
ttuhl-goh
tteolgo
Conditional "if" — (면)
떨면
ttuhl-myuhn
tteolmyeon
Progressive (고 있어요)
떨고 있어요
ttuhl-goh ee-ssuh-yoh
tteolgo isseoyo
Want to (고 싶어요)
떨고 싶어요
ttuhl-goh shee-puh-yoh
tteolgo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
떨 수 있어요
ttuhl soo ee-ssuh-yoh
tteol su isseoyo
Because / So (아/어서)
떨어서
ttuh-ruh-suh
tteoreoseo
Noun form — (기)
떨기
ttuhl-gee
tteolgi
Noun form — (음)
떪
ttuhm
tteom