Verbseoul.
ㄹ stem
굴다guldato behave, to conduct oneself, to act

To say to behave, to conduct oneself, to act politely in the present tense, use 굴어요 (goo-ruh-yoh). Below is the full conjugation of 굴다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
굴어
goo-ruh
굴어요
goo-ruh-yoh
굽니다
goom-nee-dah
Past
굴었어
goo-ruh-ssuh
굴었어요
goo-ruh-ssuh-yoh
굴었습니다
goo-ruh-sseum-nee-dah
Future
굴 거야
gool- -guh-yah
굴 거예요
gool- -guh-yae-yoh
굴 겁니다
gool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
구세요
goo-sae-yoh
Suggestion / Let's Polite (요)
굴어요
goo-ruh-yoh
Question Polite (요)
굴어요?
goo-ruh-yoh-?
Connective “and” — (고)
굴고
gool-goh
Conditional “if” — (면)
굴면
gool-myuhn
Noun form — (기)
goom