Verbseoul.
ㅂ irregular (adj)
변덕스럽다byeondeokseureopdato be fickle, to be mercurial, to be capricious

To say to be fickle, to be mercurial, to be capricious politely in the present tense, use 변덕스러워요 (byuhn-duhg-sseu-ruh-wuh-yoh). Below is the full conjugation of 변덕스럽다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
변덕스러워
byuhn-duhg-sseu-ruh-wuh
변덕스러워요
byuhn-duhg-sseu-ruh-wuh-yoh
변덕스럽습니다
byuhn-duhg-sseu-ruhp-sseum-nee-dah
Past
변덕스러웠어
byuhn-duhg-sseu-ruh-wuh-ssuh
변덕스러웠어요
byuhn-duhg-sseu-ruh-wuh-ssuh-yoh
변덕스러웠습니다
byuhn-duhg-sseu-ruh-wuh-sseum-nee-dah
Future
변덕스러울 거야
byuhn-duhg-sseu-ruh-ool- -guh-yah
변덕스러울 거예요
byuhn-duhg-sseu-ruh-ool- -guh-yae-yoh
변덕스러울 겁니다
byuhn-duhg-sseu-ruh-ool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
변덕스러우세요
byuhn-duhg-sseu-ruh-oo-sae-yoh
Suggestion / Let's Polite (요)
변덕스러워요
byuhn-duhg-sseu-ruh-wuh-yoh
Question Polite (요)
변덕스러워요?
byuhn-duhg-sseu-ruh-wuh-yoh-?
Connective “and” — (고)
변덕스럽고
byuhn-duhg-sseu-ruhp-goh
Conditional “if” — (면)
변덕스러우면
byuhn-duhg-sseu-ruh-oo-myuhn
Noun form — (기)
변덕스러움
byuhn-duhg-sseu-ruh-oom