Verbseoul.
하다 verb (adj)

야하다 conjugation (yahada, to be lewd, to be NSFW)

To say to be lewd, to be NSFW politely in the present tense, use 야해요 (yah-hae-yoh) · yahaeyo. Below is the full conjugation of 야하다 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
야해
yah-hae
yahae
야해요
yah-hae-yoh
yahaeyo
야합니다
yah-hahm-nee-dah
yahamnida
Past
야했어
yah-hae-ssuh
yahaesseo
야했어요
yah-hae-ssuh-yoh
yahaesseoyo
야했습니다
yah-hae-sseum-nee-dah
yahaesseumnida
Future
야할 거야
yah-hahl guh-yah
yahal geoya
야할 거예요
yah-hahl guh-yae-yoh
yahal geoyeyo
야할 겁니다
yah-hahl guhm-nee-dah
yahal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
야하세요
yah-hah-sae-yoh
yahaseyo
Suggestion / Let's Polite (요)
야해요
yah-hae-yoh
yahaeyo
Question Polite (요)
야해요?
yah-hae-yoh-?
yahaeyo?
Connective "and" — (고)
야하고
yah-hah-goh
yahago
Conditional "if" — (면)
야하면
yah-hah-myuhn
yahamyeon
Progressive (고 있어요)
야하고 있어요
yah-hah-goh ee-ssuh-yoh
yahago isseoyo
Want to (고 싶어요)
야하고 싶어요
yah-hah-goh shee-puh-yoh
yahago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
야할 수 있어요
yah-hahl soo ee-ssuh-yoh
yahal su isseoyo
Because / So (아/어서)
야해서
yah-hae-suh
yahaeseo
Noun form — (기)
야하기
yah-hah-gee
yahagi
Noun form — (음)
야함
yah-hahm
yaham