같이해
gah-chee-hae
gachihae
같이하다
To say to do together politely in the present tense, use 같이해요 (gah-chee-hae-yoh) · gachihaeyo. Below is the full conjugation of 같이하다 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 | 같이해요 gah-chee-hae-yoh gachihaeyo | 같이합니다 gah-chee-hahm-nee-dah gachihamnida | |
| Past | 같이했어 gah-chee-hae-ssuh gachihaesseo | 같이했어요 gah-chee-hae-ssuh-yoh gachihaesseoyo | 같이했습니다 gah-chee-hae-sseum-nee-dah gachihaesseumnida |
| Future | 같이할 거야 gah-chee-hahl guh-yah gachihal geoya | 같이할 거예요 gah-chee-hahl guh-yae-yoh gachihal geoyeyo | 같이할 겁니다 gah-chee-hahl guhm-nee-dah gachihal geomnida |
Other useful forms
Honorific / Command Polite (-(으)세요)
같이하세요
gah-chee-hah-sae-yoh
gachihaseyo
Suggestion / Let's Polite (요)
같이해요
gah-chee-hae-yoh
gachihaeyo
Question Polite (요)
같이해요?
gah-chee-hae-yoh-?
gachihaeyo?
Connective "and" — (고)
같이하고
gah-chee-hah-goh
gachihago
Conditional "if" — (면)
같이하면
gah-chee-hah-myuhn
gachihamyeon
Progressive (고 있어요)
같이하고 있어요
gah-chee-hah-goh ee-ssuh-yoh
gachihago isseoyo
Want to (고 싶어요)
같이하고 싶어요
gah-chee-hah-goh shee-puh-yoh
gachihago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
같이할 수 있어요
gah-chee-hahl soo ee-ssuh-yoh
gachihal su isseoyo
Because / So (아/어서)
같이해서
gah-chee-hae-suh
gachihaeseo
Noun form — (기)
같이하기
gah-chee-hah-gee
gachihagi
Noun form — (음)
같이함
gah-chee-hahm
gachiham