Verbseoul.
regular
켜다kyeodaTo light an oil lamp or candle

To say To light an oil lamp or candle politely in the present tense, use 켜요 (kyuh-yoh). Below is the full conjugation of 켜다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
kyuh
켜요
kyuh-yoh
켭니다
kyuhm-nee-dah
Past
켰어
kyuh-ssuh
켰어요
kyuh-ssuh-yoh
켰습니다
kyuh-sseum-nee-dah
Future
켤 거야
kyuhl- -guh-yah
켤 거예요
kyuhl- -guh-yae-yoh
켤 겁니다
kyuhl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
켜세요
kyuh-sae-yoh
Suggestion / Let's Polite (요)
켜요
kyuh-yoh
Question Polite (요)
켜요?
kyuh-yoh-?
Connective “and” — (고)
켜고
kyuh-goh
Conditional “if” — (면)
켜면
kyuh-myuhn
Noun form — (기)
kyuhm