Verbseoul.
ㅂ irregular (adj)

갑작스럽다 conjugation (gapjakseureopda, to be sudden, abrupt, unexpected)

To say to be sudden, abrupt, unexpected politely in the present tense, use 갑작스러워요 (gahp-chahg-sseu-ruh-wuh-yoh) · gapjaksseureowoyo. Below is the full conjugation of 갑작스럽다 across the three tenses and three everyday speech levels.

Grammar note (ㅂ irregular (adj)): ㅂ-irregular adjectives follow the same rule as ㅂ-irregular verbs: the ㅂ changes to 우 when a vowel suffix follows. 덥다 (to be hot) becomes 더워요; 쉽다 (to be easy) becomes 쉬워요. The ㅂ is kept intact before consonant suffixes: 덥고, 쉽지. See all ㅂ-irregular verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
갑작스러워
gahp-chahg-sseu-ruh-wuh
gapjaksseureowo
갑작스러워요
gahp-chahg-sseu-ruh-wuh-yoh
gapjaksseureowoyo
갑작스럽습니다
gahp-chahg-sseu-ruhp-sseum-nee-dah
gapjaksseureopsseumnida
Past
갑작스러웠어
gahp-chahg-sseu-ruh-wuh-ssuh
gapjaksseureowosseo
갑작스러웠어요
gahp-chahg-sseu-ruh-wuh-ssuh-yoh
gapjaksseureowosseoyo
갑작스러웠습니다
gahp-chahg-sseu-ruh-wuh-sseum-nee-dah
gapjaksseureowosseumnida
Future
갑작스러울 거야
gahp-chahg-sseu-ruh-ool guh-yah
gapjaksseureoul geoya
갑작스러울 거예요
gahp-chahg-sseu-ruh-ool guh-yae-yoh
gapjaksseureoul geoyeyo
갑작스러울 겁니다
gahp-chahg-sseu-ruh-ool guhm-nee-dah
gapjaksseureoul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
갑작스러우세요
gahp-chahg-sseu-ruh-oo-sae-yoh
gapjaksseureouseyo
Suggestion / Let's Polite (요)
갑작스러워요
gahp-chahg-sseu-ruh-wuh-yoh
gapjaksseureowoyo
Question Polite (요)
갑작스러워요?
gahp-chahg-sseu-ruh-wuh-yoh-?
gapjaksseureowoyo?
Connective "and" — (고)
갑작스럽고
gahp-chahg-sseu-ruhp-goh
gapjaksseureopgo
Conditional "if" — (면)
갑작스러우면
gahp-chahg-sseu-ruh-oo-myuhn
gapjaksseureoumyeon
Progressive (고 있어요)
갑작스럽고 있어요
gahp-chahg-sseu-ruhp-goh ee-ssuh-yoh
gapjaksseureopgo isseoyo
Want to (고 싶어요)
갑작스럽고 싶어요
gahp-chahg-sseu-ruhp-goh shee-puh-yoh
gapjaksseureopgo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
갑작스러울 수 있어요
gahp-chahg-sseu-ruh-ool soo ee-ssuh-yoh
gapjaksseureoul su isseoyo
Because / So (아/어서)
갑작스러워서
gahp-chahg-sseu-ruh-wuh-suh
gapjaksseureowoseo
Noun form — (기)
갑작스럽기
gahp-chahg-sseu-ruhp-gee
gapjaksseureopgi
Noun form — (음)
갑작스러움
gahp-chahg-sseu-ruh-oom
gapjaksseureoum