Verbseoul.
하다 verb

이용하다 conjugation (iyonghada, to use)

To say to use politely in the present tense, use 이용해요 (ee-yohng-hae-yoh) · iyonghaeyo. Below is the full conjugation of 이용하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
이용해
ee-yohng-hae
iyonghae
이용해요
ee-yohng-hae-yoh
iyonghaeyo
이용합니다
ee-yohng-hahm-nee-dah
iyonghamnida
Past
이용했어
ee-yohng-hae-ssuh
iyonghaesseo
이용했어요
ee-yohng-hae-ssuh-yoh
iyonghaesseoyo
이용했습니다
ee-yohng-hae-sseum-nee-dah
iyonghaesseumnida
Future
이용할 거야
ee-yohng-hahl guh-yah
iyonghal geoya
이용할 거예요
ee-yohng-hahl guh-yae-yoh
iyonghal geoyeyo
이용할 겁니다
ee-yohng-hahl guhm-nee-dah
iyonghal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
이용하세요
ee-yohng-hah-sae-yoh
iyonghaseyo
Suggestion / Let's Polite (요)
이용해요
ee-yohng-hae-yoh
iyonghaeyo
Question Polite (요)
이용해요?
ee-yohng-hae-yoh-?
iyonghaeyo?
Connective "and" — (고)
이용하고
ee-yohng-hah-goh
iyonghago
Conditional "if" — (면)
이용하면
ee-yohng-hah-myuhn
iyonghamyeon
Progressive (고 있어요)
이용하고 있어요
ee-yohng-hah-goh ee-ssuh-yoh
iyonghago isseoyo
Want to (고 싶어요)
이용하고 싶어요
ee-yohng-hah-goh shee-puh-yoh
iyonghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
이용할 수 있어요
ee-yohng-hahl soo ee-ssuh-yoh
iyonghal su isseoyo
Because / So (아/어서)
이용해서
ee-yohng-hae-suh
iyonghaeseo
Noun form — (기)
이용하기
ee-yohng-hah-gee
iyonghagi
Noun form — (음)
이용함
ee-yohng-hahm
iyongham