Verbseoul.
하다 verb (adj)
복잡하다bokjaphadato be complicated

To say to be complicated politely in the present tense, use 복잡해요 (bohg-chah-pae-yoh). Below is the full conjugation of 복잡하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
복잡해
bohg-chah-pae
복잡해요
bohg-chah-pae-yoh
복잡합니다
bohg-chah-pahm-nee-dah
Past
복잡했어
bohg-chah-pae-ssuh
복잡했어요
bohg-chah-pae-ssuh-yoh
복잡했습니다
bohg-chah-pae-sseum-nee-dah
Future
복잡할 거야
bohg-chah-pahl- -guh-yah
복잡할 거예요
bohg-chah-pahl- -guh-yae-yoh
복잡할 겁니다
bohg-chah-pahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
복잡하세요
bohg-chah-pah-sae-yoh
Suggestion / Let's Polite (요)
복잡해요
bohg-chah-pae-yoh
Question Polite (요)
복잡해요?
bohg-chah-pae-yoh-?
Connective “and” — (고)
복잡하고
bohg-chah-pah-goh
Conditional “if” — (면)
복잡하면
bohg-chah-pah-myuhn
Noun form — (기)
복잡함
bohg-chah-pahm