Verbseoul.
하다 verb
연구하다yeonguhadato conduct research

To say to conduct research politely in the present tense, use 연구해요 (yuhn-goo-hae-yoh). Below is the full conjugation of 연구하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
연구해
yuhn-goo-hae
연구해요
yuhn-goo-hae-yoh
연구합니다
yuhn-goo-hahm-nee-dah
Past
연구했어
yuhn-goo-hae-ssuh
연구했어요
yuhn-goo-hae-ssuh-yoh
연구했습니다
yuhn-goo-hae-sseum-nee-dah
Future
연구할 거야
yuhn-goo-hahl- -guh-yah
연구할 거예요
yuhn-goo-hahl- -guh-yae-yoh
연구할 겁니다
yuhn-goo-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
연구하세요
yuhn-goo-hah-sae-yoh
Suggestion / Let's Polite (요)
연구해요
yuhn-goo-hae-yoh
Question Polite (요)
연구해요?
yuhn-goo-hae-yoh-?
Connective “and” — (고)
연구하고
yuhn-goo-hah-goh
Conditional “if” — (면)
연구하면
yuhn-goo-hah-myuhn
Noun form — (기)
연구함
yuhn-goo-hahm