Verbseoul.
regular
끼다kkidato insert, to fasten, to put in

To say to insert, to fasten, to put in politely in the present tense, use 껴요 (ggyuh-yoh). Below is the full conjugation of 끼다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
ggyuh
껴요
ggyuh-yoh
낍니다
ggeem-nee-dah
Past
꼈어
ggyuh-ssuh
꼈어요
ggyuh-ssuh-yoh
꼈습니다
ggyuh-sseum-nee-dah
Future
낄 거야
ggeel- -guh-yah
낄 거예요
ggeel- -guh-yae-yoh
낄 겁니다
ggeel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
끼세요
ggee-sae-yoh
Suggestion / Let's Polite (요)
껴요
ggyuh-yoh
Question Polite (요)
껴요?
ggyuh-yoh-?
Connective “and” — (고)
끼고
ggee-goh
Conditional “if” — (면)
끼면
ggee-myuhn
Noun form — (기)
ggeem