보증해
boh-cheung-hae
bojeunghae
보증하다
To say to guarantee politely in the present tense, use 보증해요 (boh-cheung-hae-yoh) · bojeunghaeyo. Below is the full conjugation of 보증하다 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 | 보증해요 boh-cheung-hae-yoh bojeunghaeyo | 보증합니다 boh-cheung-hahm-nee-dah bojeunghamnida | |
| Past | 보증했어 boh-cheung-hae-ssuh bojeunghaesseo | 보증했어요 boh-cheung-hae-ssuh-yoh bojeunghaesseoyo | 보증했습니다 boh-cheung-hae-sseum-nee-dah bojeunghaesseumnida |
| Future | 보증할 거야 boh-cheung-hahl guh-yah bojeunghal geoya | 보증할 거예요 boh-cheung-hahl guh-yae-yoh bojeunghal geoyeyo | 보증할 겁니다 boh-cheung-hahl guhm-nee-dah bojeunghal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
보증하세요
boh-cheung-hah-sae-yoh
bojeunghaseyo
Suggestion / Let's Polite (요)
보증해요
boh-cheung-hae-yoh
bojeunghaeyo
Question Polite (요)
보증해요?
boh-cheung-hae-yoh-?
bojeunghaeyo?
Connective "and" — (고)
보증하고
boh-cheung-hah-goh
bojeunghago
Conditional "if" — (면)
보증하면
boh-cheung-hah-myuhn
bojeunghamyeon
Progressive (고 있어요)
보증하고 있어요
boh-cheung-hah-goh ee-ssuh-yoh
bojeunghago isseoyo
Want to (고 싶어요)
보증하고 싶어요
boh-cheung-hah-goh shee-puh-yoh
bojeunghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
보증할 수 있어요
boh-cheung-hahl soo ee-ssuh-yoh
bojeunghal su isseoyo
Because / So (아/어서)
보증해서
boh-cheung-hae-suh
bojeunghaeseo
Noun form — (기)
보증하기
boh-cheung-hah-gee
bojeunghagi
Noun form — (음)
보증함
boh-cheung-hahm
bojeungham