Verbseoul.
하다 verb
배신하다baesinhadato betray

To say to betray politely in the present tense, use 배신해요 (bae-sheen-hae-yoh). Below is the full conjugation of 배신하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
배신해
bae-sheen-hae
배신해요
bae-sheen-hae-yoh
배신합니다
bae-sheen-hahm-nee-dah
Past
배신했어
bae-sheen-hae-ssuh
배신했어요
bae-sheen-hae-ssuh-yoh
배신했습니다
bae-sheen-hae-sseum-nee-dah
Future
배신할 거야
bae-sheen-hahl- -guh-yah
배신할 거예요
bae-sheen-hahl- -guh-yae-yoh
배신할 겁니다
bae-sheen-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
배신하세요
bae-sheen-hah-sae-yoh
Suggestion / Let's Polite (요)
배신해요
bae-sheen-hae-yoh
Question Polite (요)
배신해요?
bae-sheen-hae-yoh-?
Connective “and” — (고)
배신하고
bae-sheen-hah-goh
Conditional “if” — (면)
배신하면
bae-sheen-hah-myuhn
Noun form — (기)
배신함
bae-sheen-hahm