Verbseoul.
하다 verb (adj)
열렬하다yeolryeolhadato be enthusiastic, to be vehement, to be ardent

To say to be enthusiastic, to be vehement, to be ardent politely in the present tense, use 열렬해요 (yuhl-ryuhl-hae-yoh). Below is the full conjugation of 열렬하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
열렬해
yuhl-ryuhl-hae
열렬해요
yuhl-ryuhl-hae-yoh
열렬합니다
yuhl-ryuhl-hahm-nee-dah
Past
열렬했어
yuhl-ryuhl-hae-ssuh
열렬했어요
yuhl-ryuhl-hae-ssuh-yoh
열렬했습니다
yuhl-ryuhl-hae-sseum-nee-dah
Future
열렬할 거야
yuhl-ryuhl-hahl- -guh-yah
열렬할 거예요
yuhl-ryuhl-hahl- -guh-yae-yoh
열렬할 겁니다
yuhl-ryuhl-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
열렬하세요
yuhl-ryuhl-hah-sae-yoh
Suggestion / Let's Polite (요)
열렬해요
yuhl-ryuhl-hae-yoh
Question Polite (요)
열렬해요?
yuhl-ryuhl-hae-yoh-?
Connective “and” — (고)
열렬하고
yuhl-ryuhl-hah-goh
Conditional “if” — (면)
열렬하면
yuhl-ryuhl-hah-myuhn
Noun form — (기)
열렬함
yuhl-ryuhl-hahm