Verbseoul.
하다 verb (adj)

위대하다 conjugation (widaehada, great)

To say great politely in the present tense, use 위대해요 (wee-dae-hae-yoh) · widaehaeyo. Below is the full conjugation of 위대하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb (adj)): 하다 adjectives use the same verb 하다 as a suffix to turn descriptive nouns into predicates (행복하다 = to be happy). They conjugate identically to 하다 verbs: the 하 contracts before -아/-어 suffixes to give 해. 행복해요, 행복했어요, 행복합니다. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
위대해
wee-dae-hae
widaehae
위대해요
wee-dae-hae-yoh
widaehaeyo
위대합니다
wee-dae-hahm-nee-dah
widaehamnida
Past
위대했어
wee-dae-hae-ssuh
widaehaesseo
위대했어요
wee-dae-hae-ssuh-yoh
widaehaesseoyo
위대했습니다
wee-dae-hae-sseum-nee-dah
widaehaesseumnida
Future
위대할 거야
wee-dae-hahl guh-yah
widaehal geoya
위대할 거예요
wee-dae-hahl guh-yae-yoh
widaehal geoyeyo
위대할 겁니다
wee-dae-hahl guhm-nee-dah
widaehal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
위대하세요
wee-dae-hah-sae-yoh
widaehaseyo
Suggestion / Let's Polite (요)
위대해요
wee-dae-hae-yoh
widaehaeyo
Question Polite (요)
위대해요?
wee-dae-hae-yoh-?
widaehaeyo?
Connective "and" — (고)
위대하고
wee-dae-hah-goh
widaehago
Conditional "if" — (면)
위대하면
wee-dae-hah-myuhn
widaehamyeon
Progressive (고 있어요)
위대하고 있어요
wee-dae-hah-goh ee-ssuh-yoh
widaehago isseoyo
Want to (고 싶어요)
위대하고 싶어요
wee-dae-hah-goh shee-puh-yoh
widaehago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
위대할 수 있어요
wee-dae-hahl soo ee-ssuh-yoh
widaehal su isseoyo
Because / So (아/어서)
위대해서
wee-dae-hae-suh
widaehaeseo
Noun form — (기)
위대하기
wee-dae-hah-gee
widaehagi
Noun form — (음)
위대함
wee-dae-hahm
widaeham