Verbseoul.
descriptive
많다mandamany, much, a lot, plentiful

To say many, much, a lot, plentiful politely in the present tense, use 많아요 (mahn-ah-yoh). Below is the full conjugation of 많다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
많아
mahn-ah
많아요
mahn-ah-yoh
많습니다
mahn-seum-nee-dah
Past
많았어
mahn-ah-ssuh
많았어요
mahn-ah-ssuh-yoh
많았습니다
mahn-ah-sseum-nee-dah
Future
많을 거야
mahn-eul- -guh-yah
많을 거예요
mahn-eul- -guh-yae-yoh
많을 겁니다
mahn-eul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
많으세요
mahn-eu-sae-yoh
Suggestion / Let's Polite (요)
많아요
mahn-ah-yoh
Question Polite (요)
많아요?
mahn-ah-yoh-?
Connective “and” — (고)
많고
mahn-goh
Conditional “if” — (면)
많으면
mahn-eu-myuhn
Noun form — (기)
많음
mahn-eum