Verbseoul.
하다 verb
의하다uihadato be due to

To say to be due to politely in the present tense, use 의해요 (ui-hae-yoh). Below is the full conjugation of 의하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
의해
ui-hae
의해요
ui-hae-yoh
의합니다
ui-hahm-nee-dah
Past
의했어
ui-hae-ssuh
의했어요
ui-hae-ssuh-yoh
의했습니다
ui-hae-sseum-nee-dah
Future
의할 거야
ui-hahl- -guh-yah
의할 거예요
ui-hahl- -guh-yae-yoh
의할 겁니다
ui-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
의하세요
ui-hah-sae-yoh
Suggestion / Let's Polite (요)
의해요
ui-hae-yoh
Question Polite (요)
의해요?
ui-hae-yoh-?
Connective “and” — (고)
의하고
ui-hah-goh
Conditional “if” — (면)
의하면
ui-hah-myuhn
Noun form — (기)
의함
ui-hahm