Verbseoul.
하다 verb (adj)
울창하다ulchanghadadense

To say dense politely in the present tense, use 울창해요 (ool-chahng-hae-yoh). Below is the full conjugation of 울창하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
울창해
ool-chahng-hae
울창해요
ool-chahng-hae-yoh
울창합니다
ool-chahng-hahm-nee-dah
Past
울창했어
ool-chahng-hae-ssuh
울창했어요
ool-chahng-hae-ssuh-yoh
울창했습니다
ool-chahng-hae-sseum-nee-dah
Future
울창할 거야
ool-chahng-hahl- -guh-yah
울창할 거예요
ool-chahng-hahl- -guh-yae-yoh
울창할 겁니다
ool-chahng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
울창하세요
ool-chahng-hah-sae-yoh
Suggestion / Let's Polite (요)
울창해요
ool-chahng-hae-yoh
Question Polite (요)
울창해요?
ool-chahng-hae-yoh-?
Connective “and” — (고)
울창하고
ool-chahng-hah-goh
Conditional “if” — (면)
울창하면
ool-chahng-hah-myuhn
Noun form — (기)
울창함
ool-chahng-hahm