Verbseoul.
regular
힘내다himnaedato pluck up one's heart, to gather heart

To say to pluck up one's heart, to gather heart politely in the present tense, use 힘내요 (heem-nae-yoh). Below is the full conjugation of 힘내다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
힘내
heem-nae
힘내요
heem-nae-yoh
힘냅니다
heem-naem-nee-dah
Past
힘냈어
heem-nae-ssuh
힘냈어요
heem-nae-ssuh-yoh
힘냈습니다
heem-nae-sseum-nee-dah
Future
힘낼 거야
heem-nael- -guh-yah
힘낼 거예요
heem-nael- -guh-yae-yoh
힘낼 겁니다
heem-nael- -guhm-nee-dah

Other useful forms

Command Polite (세요)
힘내세요
heem-nae-sae-yoh
Suggestion / Let's Polite (요)
힘내요
heem-nae-yoh
Question Polite (요)
힘내요?
heem-nae-yoh-?
Connective “and” — (고)
힘내고
heem-nae-goh
Conditional “if” — (면)
힘내면
heem-nae-myuhn
Noun form — (기)
힘냄
heem-naem