Verbseoul.
regular
끼치다kkichidato cause, to exert

To say to cause, to exert politely in the present tense, use 끼쳐요 (ggee-chyuh-yoh). Below is the full conjugation of 끼치다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
끼쳐
ggee-chyuh
끼쳐요
ggee-chyuh-yoh
끼칩니다
ggee-cheem-nee-dah
Past
끼쳤어
ggee-chyuh-ssuh
끼쳤어요
ggee-chyuh-ssuh-yoh
끼쳤습니다
ggee-chyuh-sseum-nee-dah
Future
끼칠 거야
ggee-cheel- -guh-yah
끼칠 거예요
ggee-cheel- -guh-yae-yoh
끼칠 겁니다
ggee-cheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
끼치세요
ggee-chee-sae-yoh
Suggestion / Let's Polite (요)
끼쳐요
ggee-chyuh-yoh
Question Polite (요)
끼쳐요?
ggee-chyuh-yoh-?
Connective “and” — (고)
끼치고
ggee-chee-goh
Conditional “if” — (면)
끼치면
ggee-chee-myuhn
Noun form — (기)
끼침
ggee-cheem