Verbseoul.
ㄹ stem
더불다deobuldato be accompanied by, to bring a person

To say to be accompanied by, to bring a person politely in the present tense, use 더불어요 (duh-boo-ruh-yoh). Below is the full conjugation of 더불다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
더불어
duh-boo-ruh
더불어요
duh-boo-ruh-yoh
더붑니다
duh-boom-nee-dah
Past
더불었어
duh-boo-ruh-ssuh
더불었어요
duh-boo-ruh-ssuh-yoh
더불었습니다
duh-boo-ruh-sseum-nee-dah
Future
더불 거야
duh-bool- -guh-yah
더불 거예요
duh-bool- -guh-yae-yoh
더불 겁니다
duh-bool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
더부세요
duh-boo-sae-yoh
Suggestion / Let's Polite (요)
더불어요
duh-boo-ruh-yoh
Question Polite (요)
더불어요?
duh-boo-ruh-yoh-?
Connective “and” — (고)
더불고
duh-bool-goh
Conditional “if” — (면)
더불면
duh-bool-myuhn
Noun form — (기)
더붊
duh-boom