Verbseoul.
하다 verb
이용하다iyonghadato use

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

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
이용해
ee-yohng-hae
이용해요
ee-yohng-hae-yoh
이용합니다
ee-yohng-hahm-nee-dah
Past
이용했어
ee-yohng-hae-ssuh
이용했어요
ee-yohng-hae-ssuh-yoh
이용했습니다
ee-yohng-hae-sseum-nee-dah
Future
이용할 거야
ee-yohng-hahl- -guh-yah
이용할 거예요
ee-yohng-hahl- -guh-yae-yoh
이용할 겁니다
ee-yohng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
이용하세요
ee-yohng-hah-sae-yoh
Suggestion / Let's Polite (요)
이용해요
ee-yohng-hae-yoh
Question Polite (요)
이용해요?
ee-yohng-hae-yoh-?
Connective “and” — (고)
이용하고
ee-yohng-hah-goh
Conditional “if” — (면)
이용하면
ee-yohng-hah-myuhn
Noun form — (기)
이용함
ee-yohng-hahm