Verbseoul.
하다 verb
작동하다jakdonghadato operate, to function, to run, to be on

To say to operate, to function, to run, to be on politely in the present tense, use 작동해요 (chahg-dohng-hae-yoh). Below is the full conjugation of 작동하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
작동해
chahg-dohng-hae
작동해요
chahg-dohng-hae-yoh
작동합니다
chahg-dohng-hahm-nee-dah
Past
작동했어
chahg-dohng-hae-ssuh
작동했어요
chahg-dohng-hae-ssuh-yoh
작동했습니다
chahg-dohng-hae-sseum-nee-dah
Future
작동할 거야
chahg-dohng-hahl- -guh-yah
작동할 거예요
chahg-dohng-hahl- -guh-yae-yoh
작동할 겁니다
chahg-dohng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
작동하세요
chahg-dohng-hah-sae-yoh
Suggestion / Let's Polite (요)
작동해요
chahg-dohng-hae-yoh
Question Polite (요)
작동해요?
chahg-dohng-hae-yoh-?
Connective “and” — (고)
작동하고
chahg-dohng-hah-goh
Conditional “if” — (면)
작동하면
chahg-dohng-hah-myuhn
Noun form — (기)
작동함
chahg-dohng-hahm