유익해
yoo-ee-kae
yuikae
유익하다
To say to be profitable politely in the present tense, use 유익해요 (yoo-ee-kae-yoh) · yuikaeyo. Below is the full conjugation of 유익하다 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 | 유익해요 yoo-ee-kae-yoh yuikaeyo | 유익합니다 yoo-ee-kahm-nee-dah yuikamnida | |
| Past | 유익했어 yoo-ee-kae-ssuh yuikaesseo | 유익했어요 yoo-ee-kae-ssuh-yoh yuikaesseoyo | 유익했습니다 yoo-ee-kae-sseum-nee-dah yuikaesseumnida |
| Future | 유익할 거야 yoo-ee-kahl guh-yah yuikal geoya | 유익할 거예요 yoo-ee-kahl guh-yae-yoh yuikal geoyeyo | 유익할 겁니다 yoo-ee-kahl guhm-nee-dah yuikal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
유익하세요
yoo-ee-kah-sae-yoh
yuikaseyo
Suggestion / Let's Polite (요)
유익해요
yoo-ee-kae-yoh
yuikaeyo
Question Polite (요)
유익해요?
yoo-ee-kae-yoh-?
yuikaeyo?
Connective "and" — (고)
유익하고
yoo-ee-kah-goh
yuikago
Conditional "if" — (면)
유익하면
yoo-ee-kah-myuhn
yuikamyeon
Progressive (고 있어요)
유익하고 있어요
yoo-ee-kah-goh ee-ssuh-yoh
yuikago isseoyo
Want to (고 싶어요)
유익하고 싶어요
yoo-ee-kah-goh shee-puh-yoh
yuikago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
유익할 수 있어요
yoo-ee-kahl soo ee-ssuh-yoh
yuikal su isseoyo
Because / So (아/어서)
유익해서
yoo-ee-kae-suh
yuikaeseo
Noun form — (기)
유익하기
yoo-ee-kah-gee
yuikagi
Noun form — (음)
유익함
yoo-ee-kahm
yuikam