Verbseoul.
하다 verb (adj)
흥미진진하다heungmijinjinhadato be of great interest, to be very interesting

To say to be of great interest, to be very interesting politely in the present tense, use 흥미진진해요 (heung-mee-cheen-cheen-hae-yoh). Below is the full conjugation of 흥미진진하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
흥미진진해
heung-mee-cheen-cheen-hae
흥미진진해요
heung-mee-cheen-cheen-hae-yoh
흥미진진합니다
heung-mee-cheen-cheen-hahm-nee-dah
Past
흥미진진했어
heung-mee-cheen-cheen-hae-ssuh
흥미진진했어요
heung-mee-cheen-cheen-hae-ssuh-yoh
흥미진진했습니다
heung-mee-cheen-cheen-hae-sseum-nee-dah
Future
흥미진진할 거야
heung-mee-cheen-cheen-hahl- -guh-yah
흥미진진할 거예요
heung-mee-cheen-cheen-hahl- -guh-yae-yoh
흥미진진할 겁니다
heung-mee-cheen-cheen-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
흥미진진하세요
heung-mee-cheen-cheen-hah-sae-yoh
Suggestion / Let's Polite (요)
흥미진진해요
heung-mee-cheen-cheen-hae-yoh
Question Polite (요)
흥미진진해요?
heung-mee-cheen-cheen-hae-yoh-?
Connective “and” — (고)
흥미진진하고
heung-mee-cheen-cheen-hah-goh
Conditional “if” — (면)
흥미진진하면
heung-mee-cheen-cheen-hah-myuhn
Noun form — (기)
흥미진진함
heung-mee-cheen-cheen-hahm