증명해
cheung-myuhng-hae
jeungmyeonghae
증명하다
To say to prove politely in the present tense, use 증명해요 (cheung-myuhng-hae-yoh) · jeungmyeonghaeyo. Below is the full conjugation of 증명하다 across the three tenses and three everyday speech levels.
Grammar note (하다 verb): 하다 verbs are formed with a Sino-Korean noun + 하다 (e.g. 공부하다 = study + do). 하다 conjugates irregularly: the ㅏ in 하 contracts with the -아/-어 suffix to give 해 (not *하어). Present polite: 해요; past polite: 했어요. The formal ending is 합니다 (not *하습니다). Most noun+하다 compounds follow this pattern uniformly. See all 하다 verbs →
Conjugation table
pron. = pronunciation guide · RR = Revised Romanization
Highlighted = where the stem changes
| Tense | Casual (반말) | Polite (요) | Formal (합니다) |
|---|---|---|---|
| Present | 증명해요 cheung-myuhng-hae-yoh jeungmyeonghaeyo | 증명합니다 cheung-myuhng-hahm-nee-dah jeungmyeonghamnida | |
| Past | 증명했어 cheung-myuhng-hae-ssuh jeungmyeonghaesseo | 증명했어요 cheung-myuhng-hae-ssuh-yoh jeungmyeonghaesseoyo | 증명했습니다 cheung-myuhng-hae-sseum-nee-dah jeungmyeonghaesseumnida |
| Future | 증명할 거야 cheung-myuhng-hahl guh-yah jeungmyeonghal geoya | 증명할 거예요 cheung-myuhng-hahl guh-yae-yoh jeungmyeonghal geoyeyo | 증명할 겁니다 cheung-myuhng-hahl guhm-nee-dah jeungmyeonghal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
증명하세요
cheung-myuhng-hah-sae-yoh
jeungmyeonghaseyo
Suggestion / Let's Polite (요)
증명해요
cheung-myuhng-hae-yoh
jeungmyeonghaeyo
Question Polite (요)
증명해요?
cheung-myuhng-hae-yoh-?
jeungmyeonghaeyo?
Connective "and" — (고)
증명하고
cheung-myuhng-hah-goh
jeungmyeonghago
Conditional "if" — (면)
증명하면
cheung-myuhng-hah-myuhn
jeungmyeonghamyeon
Progressive (고 있어요)
증명하고 있어요
cheung-myuhng-hah-goh ee-ssuh-yoh
jeungmyeonghago isseoyo
Want to (고 싶어요)
증명하고 싶어요
cheung-myuhng-hah-goh shee-puh-yoh
jeungmyeonghago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
증명할 수 있어요
cheung-myuhng-hahl soo ee-ssuh-yoh
jeungmyeonghal su isseoyo
Because / So (아/어서)
증명해서
cheung-myuhng-hae-suh
jeungmyeonghaeseo
Noun form — (기)
증명하기
cheung-myuhng-hah-gee
jeungmyeonghagi
Noun form — (음)
증명함
cheung-myuhng-hahm
jeungmyeongham