Verbseoul.
하다 verb (adj)

무용하다 conjugation (muyonghada, useless)

To say useless politely in the present tense, use 무용해요 (moo-yohng-hae-yoh) · muyonghaeyo. Below is the full conjugation of 무용하다 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
무용해
moo-yohng-hae
muyonghae
무용해요
moo-yohng-hae-yoh
muyonghaeyo
무용합니다
moo-yohng-hahm-nee-dah
muyonghamnida
Past
무용했어
moo-yohng-hae-ssuh
muyonghaesseo
무용했어요
moo-yohng-hae-ssuh-yoh
muyonghaesseoyo
무용했습니다
moo-yohng-hae-sseum-nee-dah
muyonghaesseumnida
Future
무용할 거야
moo-yohng-hahl guh-yah
muyonghal geoya
무용할 거예요
moo-yohng-hahl guh-yae-yoh
muyonghal geoyeyo
무용할 겁니다
moo-yohng-hahl guhm-nee-dah
muyonghal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
무용하세요
moo-yohng-hah-sae-yoh
muyonghaseyo
Suggestion / Let's Polite (요)
무용해요
moo-yohng-hae-yoh
muyonghaeyo
Question Polite (요)
무용해요?
moo-yohng-hae-yoh-?
muyonghaeyo?
Connective "and" — (고)
무용하고
moo-yohng-hah-goh
muyonghago
Conditional "if" — (면)
무용하면
moo-yohng-hah-myuhn
muyonghamyeon
Progressive (고 있어요)
무용하고 있어요
moo-yohng-hah-goh ee-ssuh-yoh
muyonghago isseoyo
Want to (고 싶어요)
무용하고 싶어요
moo-yohng-hah-goh shee-puh-yoh
muyonghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
무용할 수 있어요
moo-yohng-hahl soo ee-ssuh-yoh
muyonghal su isseoyo
Because / So (아/어서)
무용해서
moo-yohng-hae-suh
muyonghaeseo
Noun form — (기)
무용하기
moo-yohng-hah-gee
muyonghagi
Noun form — (음)
무용함
moo-yohng-hahm
muyongham