Verbseoul.
descriptive

수많다 conjugation (sumanda, to be numerous)

To say to be numerous politely in the present tense, use 수많아요 (soo-mahn-ah-yoh) · sumaayo. Below is the full conjugation of 수많다 across the three tenses and three everyday speech levels.

Grammar note (descriptive): Descriptive verbs (형용사) function like adjectives in Korean and conjugate the same way as regular action verbs. They cannot take the progressive -고 있어요 or imperative forms. 좋다 (to be good) → 좋아요; 크다 (to be big) → 커요 (으-irregular).

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

TenseCasual (반말)Polite (요)Formal (합니다)
Present
수많아
soo-mahn-ah
sumaa
수많아요
soo-mahn-ah-yoh
sumaayo
수많습니다
soo-mahn-seum-nee-dah
sumaseumnida
Past
수많았어
soo-mahn-ah-ssuh
sumaasseo
수많았어요
soo-mahn-ah-ssuh-yoh
sumaasseoyo
수많았습니다
soo-mahn-ah-sseum-nee-dah
sumaasseumnida
Future
수많을 거야
soo-mahn-eul guh-yah
sumaeul geoya
수많을 거예요
soo-mahn-eul guh-yae-yoh
sumaeul geoyeyo
수많을 겁니다
soo-mahn-eul guhm-nee-dah
sumaeul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
수많으세요
soo-mahn-eu-sae-yoh
sumaeuseyo
Suggestion / Let's Polite (요)
수많아요
soo-mahn-ah-yoh
sumaayo
Question Polite (요)
수많아요?
soo-mahn-ah-yoh-?
sumaayo?
Connective "and" — (고)
수많고
soo-mahn-goh
sumago
Conditional "if" — (면)
수많으면
soo-mahn-eu-myuhn
sumaeumyeon
Progressive (고 있어요)
수많고 있어요
soo-mahn-goh ee-ssuh-yoh
sumago isseoyo
Want to (고 싶어요)
수많고 싶어요
soo-mahn-goh shee-puh-yoh
sumago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
수많을 수 있어요
soo-mahn-eul soo ee-ssuh-yoh
sumaeul su isseoyo
Because / So (아/어서)
수많아서
soo-mahn-ah-suh
sumaaseo
Noun form — (기)
수많기
soo-mahn-gee
sumagi
Noun form — (음)
수많음
soo-mahn-eum
sumaeum