Verbseoul.
하다 verb
유지하다yujihadato maintain, to continue

To say to maintain, to continue politely in the present tense, use 유지해요 (yoo-chee-hae-yoh). Below is the full conjugation of 유지하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
유지해
yoo-chee-hae
유지해요
yoo-chee-hae-yoh
유지합니다
yoo-chee-hahm-nee-dah
Past
유지했어
yoo-chee-hae-ssuh
유지했어요
yoo-chee-hae-ssuh-yoh
유지했습니다
yoo-chee-hae-sseum-nee-dah
Future
유지할 거야
yoo-chee-hahl- -guh-yah
유지할 거예요
yoo-chee-hahl- -guh-yae-yoh
유지할 겁니다
yoo-chee-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
유지하세요
yoo-chee-hah-sae-yoh
Suggestion / Let's Polite (요)
유지해요
yoo-chee-hae-yoh
Question Polite (요)
유지해요?
yoo-chee-hae-yoh-?
Connective “and” — (고)
유지하고
yoo-chee-hah-goh
Conditional “if” — (면)
유지하면
yoo-chee-hah-myuhn
Noun form — (기)
유지함
yoo-chee-hahm