Verbseoul.
regular
마치다machidato finish

To say to finish politely in the present tense, use 마쳐요 (mah-chyuh-yoh). Below is the full conjugation of 마치다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
마쳐
mah-chyuh
마쳐요
mah-chyuh-yoh
마칩니다
mah-cheem-nee-dah
Past
마쳤어
mah-chyuh-ssuh
마쳤어요
mah-chyuh-ssuh-yoh
마쳤습니다
mah-chyuh-sseum-nee-dah
Future
마칠 거야
mah-cheel- -guh-yah
마칠 거예요
mah-cheel- -guh-yae-yoh
마칠 겁니다
mah-cheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
마치세요
mah-chee-sae-yoh
Suggestion / Let's Polite (요)
마쳐요
mah-chyuh-yoh
Question Polite (요)
마쳐요?
mah-chyuh-yoh-?
Connective “and” — (고)
마치고
mah-chee-goh
Conditional “if” — (면)
마치면
mah-chee-myuhn
Noun form — (기)
마침
mah-cheem