Verbseoul.
하다 verb (adj)
공손하다gongsonhadapolite, courteous, well-mannered

To say polite, courteous, well-mannered politely in the present tense, use 공손해요 (gohng-sohn-hae-yoh). Below is the full conjugation of 공손하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
공손해
gohng-sohn-hae
공손해요
gohng-sohn-hae-yoh
공손합니다
gohng-sohn-hahm-nee-dah
Past
공손했어
gohng-sohn-hae-ssuh
공손했어요
gohng-sohn-hae-ssuh-yoh
공손했습니다
gohng-sohn-hae-sseum-nee-dah
Future
공손할 거야
gohng-sohn-hahl- -guh-yah
공손할 거예요
gohng-sohn-hahl- -guh-yae-yoh
공손할 겁니다
gohng-sohn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
공손하세요
gohng-sohn-hah-sae-yoh
Suggestion / Let's Polite (요)
공손해요
gohng-sohn-hae-yoh
Question Polite (요)
공손해요?
gohng-sohn-hae-yoh-?
Connective “and” — (고)
공손하고
gohng-sohn-hah-goh
Conditional “if” — (면)
공손하면
gohng-sohn-hah-myuhn
Noun form — (기)
공손함
gohng-sohn-hahm