Verbseoul.
regular
해내다haenaedato accomplish, to manage, to achieve

To say to accomplish, to manage, to achieve politely in the present tense, use 해내요 (hae-nae-yoh). Below is the full conjugation of 해내다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
해내
hae-nae
해내요
hae-nae-yoh
해냅니다
hae-naem-nee-dah
Past
해냈어
hae-nae-ssuh
해냈어요
hae-nae-ssuh-yoh
해냈습니다
hae-nae-sseum-nee-dah
Future
해낼 거야
hae-nael- -guh-yah
해낼 거예요
hae-nael- -guh-yae-yoh
해낼 겁니다
hae-nael- -guhm-nee-dah

Other useful forms

Command Polite (세요)
해내세요
hae-nae-sae-yoh
Suggestion / Let's Polite (요)
해내요
hae-nae-yoh
Question Polite (요)
해내요?
hae-nae-yoh-?
Connective “and” — (고)
해내고
hae-nae-goh
Conditional “if” — (면)
해내면
hae-nae-myuhn
Noun form — (기)
해냄
hae-naem