경계해
gyuhng-gyae-hae
gyeonggyehae
경계하다
To say to be vigilant politely in the present tense, use 경계해요 (gyuhng-gyae-hae-yoh) · gyeonggyehaeyo. Below is the full conjugation of 경계하다 across the three tenses and three everyday speech levels.
Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →
Conjugation table
pron. = pronunciation guide · RR = Revised Romanization
Highlighted = where the stem changes
| Tense | Casual (반말) | Polite (요) | Formal (합니다) |
|---|---|---|---|
| Present | 경계해요 gyuhng-gyae-hae-yoh gyeonggyehaeyo | 경계합니다 gyuhng-gyae-hahm-nee-dah gyeonggyehamnida | |
| Past | 경계했어 gyuhng-gyae-hae-ssuh gyeonggyehaesseo | 경계했어요 gyuhng-gyae-hae-ssuh-yoh gyeonggyehaesseoyo | 경계했습니다 gyuhng-gyae-hae-sseum-nee-dah gyeonggyehaesseumnida |
| Future | 경계할 거야 gyuhng-gyae-hahl guh-yah gyeonggyehal geoya | 경계할 거예요 gyuhng-gyae-hahl guh-yae-yoh gyeonggyehal geoyeyo | 경계할 겁니다 gyuhng-gyae-hahl guhm-nee-dah gyeonggyehal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
경계하세요
gyuhng-gyae-hah-sae-yoh
gyeonggyehaseyo
Suggestion / Let's Polite (요)
경계해요
gyuhng-gyae-hae-yoh
gyeonggyehaeyo
Question Polite (요)
경계해요?
gyuhng-gyae-hae-yoh-?
gyeonggyehaeyo?
Connective "and" — (고)
경계하고
gyuhng-gyae-hah-goh
gyeonggyehago
Conditional "if" — (면)
경계하면
gyuhng-gyae-hah-myuhn
gyeonggyehamyeon
Progressive (고 있어요)
경계하고 있어요
gyuhng-gyae-hah-goh ee-ssuh-yoh
gyeonggyehago isseoyo
Want to (고 싶어요)
경계하고 싶어요
gyuhng-gyae-hah-goh shee-puh-yoh
gyeonggyehago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
경계할 수 있어요
gyuhng-gyae-hahl soo ee-ssuh-yoh
gyeonggyehal su isseoyo
Because / So (아/어서)
경계해서
gyuhng-gyae-hae-suh
gyeonggyehaeseo
Noun form — (기)
경계하기
gyuhng-gyae-hah-gee
gyeonggyehagi
Noun form — (음)
경계함
gyuhng-gyae-hahm
gyeonggyeham