Verbseoul.
하다 verb
주의하다juuihadato watch out

To say to watch out politely in the present tense, use 주의해요 (choo-ui-hae-yoh). Below is the full conjugation of 주의하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
주의해
choo-ui-hae
주의해요
choo-ui-hae-yoh
주의합니다
choo-ui-hahm-nee-dah
Past
주의했어
choo-ui-hae-ssuh
주의했어요
choo-ui-hae-ssuh-yoh
주의했습니다
choo-ui-hae-sseum-nee-dah
Future
주의할 거야
choo-ui-hahl- -guh-yah
주의할 거예요
choo-ui-hahl- -guh-yae-yoh
주의할 겁니다
choo-ui-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
주의하세요
choo-ui-hah-sae-yoh
Suggestion / Let's Polite (요)
주의해요
choo-ui-hae-yoh
Question Polite (요)
주의해요?
choo-ui-hae-yoh-?
Connective “and” — (고)
주의하고
choo-ui-hah-goh
Conditional “if” — (면)
주의하면
choo-ui-hah-myuhn
Noun form — (기)
주의함
choo-ui-hahm