Verbseoul.
하다 verb
첨부하다cheombuhadato attach (e.g. file to an email)

To say to attach (e.g. file to an email) politely in the present tense, use 첨부해요 (chuhm-boo-hae-yoh). Below is the full conjugation of 첨부하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
첨부해
chuhm-boo-hae
첨부해요
chuhm-boo-hae-yoh
첨부합니다
chuhm-boo-hahm-nee-dah
Past
첨부했어
chuhm-boo-hae-ssuh
첨부했어요
chuhm-boo-hae-ssuh-yoh
첨부했습니다
chuhm-boo-hae-sseum-nee-dah
Future
첨부할 거야
chuhm-boo-hahl- -guh-yah
첨부할 거예요
chuhm-boo-hahl- -guh-yae-yoh
첨부할 겁니다
chuhm-boo-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
첨부하세요
chuhm-boo-hah-sae-yoh
Suggestion / Let's Polite (요)
첨부해요
chuhm-boo-hae-yoh
Question Polite (요)
첨부해요?
chuhm-boo-hae-yoh-?
Connective “and” — (고)
첨부하고
chuhm-boo-hah-goh
Conditional “if” — (면)
첨부하면
chuhm-boo-hah-myuhn
Noun form — (기)
첨부함
chuhm-boo-hahm