Verbseoul.
regular
앞장서다apjangseodato lead, to head, to forerun

To say to lead, to head, to forerun politely in the present tense, use 앞장서요 (ahp-chahng-suh-yoh). Below is the full conjugation of 앞장서다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
앞장서
ahp-chahng-suh
앞장서요
ahp-chahng-suh-yoh
앞장섭니다
ahp-chahng-suhm-nee-dah
Past
앞장섰어
ahp-chahng-suh-ssuh
앞장섰어요
ahp-chahng-suh-ssuh-yoh
앞장섰습니다
ahp-chahng-suh-sseum-nee-dah
Future
앞장설 거야
ahp-chahng-suhl- -guh-yah
앞장설 거예요
ahp-chahng-suhl- -guh-yae-yoh
앞장설 겁니다
ahp-chahng-suhl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
앞장서세요
ahp-chahng-suh-sae-yoh
Suggestion / Let's Polite (요)
앞장서요
ahp-chahng-suh-yoh
Question Polite (요)
앞장서요?
ahp-chahng-suh-yoh-?
Connective “and” — (고)
앞장서고
ahp-chahng-suh-goh
Conditional “if” — (면)
앞장서면
ahp-chahng-suh-myuhn
Noun form — (기)
앞장섬
ahp-chahng-suhm