Verbseoul.
으 irregular
끄다kkeudato extinguish

To say to extinguish politely in the present tense, use 꺼요 (gguh-yoh). Below is the full conjugation of 끄다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
gguh
꺼요
gguh-yoh
끕니다
ggeum-nee-dah
Past
껐어
gguh-ssuh
껐어요
gguh-ssuh-yoh
껐습니다
gguh-sseum-nee-dah
Future
끌 거야
ggeul- -guh-yah
끌 거예요
ggeul- -guh-yae-yoh
끌 겁니다
ggeul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
끄세요
ggeu-sae-yoh
Suggestion / Let's Polite (요)
꺼요
gguh-yoh
Question Polite (요)
꺼요?
gguh-yoh-?
Connective “and” — (고)
끄고
ggeu-goh
Conditional “if” — (면)
끄면
ggeu-myuhn
Noun form — (기)
ggeum