Verbseoul.
하다 verb
답장하다dapjanghadato answer

To say to answer politely in the present tense, use 답장해요 (dahp-chahng-hae-yoh). Below is the full conjugation of 답장하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
답장해
dahp-chahng-hae
답장해요
dahp-chahng-hae-yoh
답장합니다
dahp-chahng-hahm-nee-dah
Past
답장했어
dahp-chahng-hae-ssuh
답장했어요
dahp-chahng-hae-ssuh-yoh
답장했습니다
dahp-chahng-hae-sseum-nee-dah
Future
답장할 거야
dahp-chahng-hahl- -guh-yah
답장할 거예요
dahp-chahng-hahl- -guh-yae-yoh
답장할 겁니다
dahp-chahng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
답장하세요
dahp-chahng-hah-sae-yoh
Suggestion / Let's Polite (요)
답장해요
dahp-chahng-hae-yoh
Question Polite (요)
답장해요?
dahp-chahng-hae-yoh-?
Connective “and” — (고)
답장하고
dahp-chahng-hah-goh
Conditional “if” — (면)
답장하면
dahp-chahng-hah-myuhn
Noun form — (기)
답장함
dahp-chahng-hahm