Verbseoul.
하다 verb
구매하다gumaehadato purchase

To say to purchase politely in the present tense, use 구매해요 (goo-mae-hae-yoh). Below is the full conjugation of 구매하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
구매해
goo-mae-hae
구매해요
goo-mae-hae-yoh
구매합니다
goo-mae-hahm-nee-dah
Past
구매했어
goo-mae-hae-ssuh
구매했어요
goo-mae-hae-ssuh-yoh
구매했습니다
goo-mae-hae-sseum-nee-dah
Future
구매할 거야
goo-mae-hahl- -guh-yah
구매할 거예요
goo-mae-hahl- -guh-yae-yoh
구매할 겁니다
goo-mae-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
구매하세요
goo-mae-hah-sae-yoh
Suggestion / Let's Polite (요)
구매해요
goo-mae-hae-yoh
Question Polite (요)
구매해요?
goo-mae-hae-yoh-?
Connective “and” — (고)
구매하고
goo-mae-hah-goh
Conditional “if” — (면)
구매하면
goo-mae-hah-myuhn
Noun form — (기)
구매함
goo-mae-hahm