Verbseoul.
하다 verb (adj)

야비하다 conjugation (yabihada, to be base, to be mean, to be underhanded)

To say to be base, to be mean, to be underhanded politely in the present tense, use 야비해요 (yah-bee-hae-yoh) · yabihaeyo. Below is the full conjugation of 야비하다 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

TenseCasual (반말)Polite (요)Formal (합니다)
Present
야비해
yah-bee-hae
yabihae
야비해요
yah-bee-hae-yoh
yabihaeyo
야비합니다
yah-bee-hahm-nee-dah
yabihamnida
Past
야비했어
yah-bee-hae-ssuh
yabihaesseo
야비했어요
yah-bee-hae-ssuh-yoh
yabihaesseoyo
야비했습니다
yah-bee-hae-sseum-nee-dah
yabihaesseumnida
Future
야비할 거야
yah-bee-hahl guh-yah
yabihal geoya
야비할 거예요
yah-bee-hahl guh-yae-yoh
yabihal geoyeyo
야비할 겁니다
yah-bee-hahl guhm-nee-dah
yabihal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
야비하세요
yah-bee-hah-sae-yoh
yabihaseyo
Suggestion / Let's Polite (요)
야비해요
yah-bee-hae-yoh
yabihaeyo
Question Polite (요)
야비해요?
yah-bee-hae-yoh-?
yabihaeyo?
Connective "and" — (고)
야비하고
yah-bee-hah-goh
yabihago
Conditional "if" — (면)
야비하면
yah-bee-hah-myuhn
yabihamyeon
Progressive (고 있어요)
야비하고 있어요
yah-bee-hah-goh ee-ssuh-yoh
yabihago isseoyo
Want to (고 싶어요)
야비하고 싶어요
yah-bee-hah-goh shee-puh-yoh
yabihago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
야비할 수 있어요
yah-bee-hahl soo ee-ssuh-yoh
yabihal su isseoyo
Because / So (아/어서)
야비해서
yah-bee-hae-suh
yabihaeseo
Noun form — (기)
야비하기
yah-bee-hah-gee
yabihagi
Noun form — (음)
야비함
yah-bee-hahm
yabiham