유용해
yoo-yohng-hae
yuyonghae
유용하다
To say useful politely in the present tense, use 유용해요 (yoo-yohng-hae-yoh) · yuyonghaeyo. Below is the full conjugation of 유용하다 across the three tenses and three everyday speech levels.
Grammar note (하다 verb (adj)): 하다 adjectives use the same verb 하다 as a suffix to turn descriptive nouns into predicates (행복하다 = to be happy). They conjugate identically to 하다 verbs: the 하 contracts before -아/-어 suffixes to give 해. 행복해요, 행복했어요, 행복합니다. 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 | 유용해요 yoo-yohng-hae-yoh yuyonghaeyo | 유용합니다 yoo-yohng-hahm-nee-dah yuyonghamnida | |
| Past | 유용했어 yoo-yohng-hae-ssuh yuyonghaesseo | 유용했어요 yoo-yohng-hae-ssuh-yoh yuyonghaesseoyo | 유용했습니다 yoo-yohng-hae-sseum-nee-dah yuyonghaesseumnida |
| Future | 유용할 거야 yoo-yohng-hahl guh-yah yuyonghal geoya | 유용할 거예요 yoo-yohng-hahl guh-yae-yoh yuyonghal geoyeyo | 유용할 겁니다 yoo-yohng-hahl guhm-nee-dah yuyonghal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
유용하세요
yoo-yohng-hah-sae-yoh
yuyonghaseyo
Suggestion / Let's Polite (요)
유용해요
yoo-yohng-hae-yoh
yuyonghaeyo
Question Polite (요)
유용해요?
yoo-yohng-hae-yoh-?
yuyonghaeyo?
Connective "and" — (고)
유용하고
yoo-yohng-hah-goh
yuyonghago
Conditional "if" — (면)
유용하면
yoo-yohng-hah-myuhn
yuyonghamyeon
Progressive (고 있어요)
유용하고 있어요
yoo-yohng-hah-goh ee-ssuh-yoh
yuyonghago isseoyo
Want to (고 싶어요)
유용하고 싶어요
yoo-yohng-hah-goh shee-puh-yoh
yuyonghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
유용할 수 있어요
yoo-yohng-hahl soo ee-ssuh-yoh
yuyonghal su isseoyo
Because / So (아/어서)
유용해서
yoo-yohng-hae-suh
yuyonghaeseo
Noun form — (기)
유용하기
yoo-yohng-hah-gee
yuyonghagi
Noun form — (음)
유용함
yoo-yohng-hahm
yuyongham