Verbseoul.
하다 verb
협력하다hyeopryeokhadato cooperate

To say to cooperate politely in the present tense, use 협력해요 (hyuhm-nyuh-kae-yoh). Below is the full conjugation of 협력하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
협력해
hyuhm-nyuh-kae
협력해요
hyuhm-nyuh-kae-yoh
협력합니다
hyuhm-nyuh-kahm-nee-dah
Past
협력했어
hyuhm-nyuh-kae-ssuh
협력했어요
hyuhm-nyuh-kae-ssuh-yoh
협력했습니다
hyuhm-nyuh-kae-sseum-nee-dah
Future
협력할 거야
hyuhm-nyuh-kahl- -guh-yah
협력할 거예요
hyuhm-nyuh-kahl- -guh-yae-yoh
협력할 겁니다
hyuhm-nyuh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
협력하세요
hyuhm-nyuh-kah-sae-yoh
Suggestion / Let's Polite (요)
협력해요
hyuhm-nyuh-kae-yoh
Question Polite (요)
협력해요?
hyuhm-nyuh-kae-yoh-?
Connective “and” — (고)
협력하고
hyuhm-nyuh-kah-goh
Conditional “if” — (면)
협력하면
hyuhm-nyuh-kah-myuhn
Noun form — (기)
협력함
hyuhm-nyuh-kahm