Verbseoul.
하다 verb

짐작하다 conjugation (jimjakhada, to guess, to assume, to conjecture)

To say to guess, to assume, to conjecture politely in the present tense, use 짐작해요 (cheem-chah-kae-yoh) · jimjakaeyo. Below is the full conjugation of 짐작하다 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

TenseCasual (반말)Polite (요)Formal (합니다)
Present
짐작해
cheem-chah-kae
jimjakae
짐작해요
cheem-chah-kae-yoh
jimjakaeyo
짐작합니다
cheem-chah-kahm-nee-dah
jimjakamnida
Past
짐작했어
cheem-chah-kae-ssuh
jimjakaesseo
짐작했어요
cheem-chah-kae-ssuh-yoh
jimjakaesseoyo
짐작했습니다
cheem-chah-kae-sseum-nee-dah
jimjakaesseumnida
Future
짐작할 거야
cheem-chah-kahl guh-yah
jimjakal geoya
짐작할 거예요
cheem-chah-kahl guh-yae-yoh
jimjakal geoyeyo
짐작할 겁니다
cheem-chah-kahl guhm-nee-dah
jimjakal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
짐작하세요
cheem-chah-kah-sae-yoh
jimjakaseyo
Suggestion / Let's Polite (요)
짐작해요
cheem-chah-kae-yoh
jimjakaeyo
Question Polite (요)
짐작해요?
cheem-chah-kae-yoh-?
jimjakaeyo?
Connective "and" — (고)
짐작하고
cheem-chah-kah-goh
jimjakago
Conditional "if" — (면)
짐작하면
cheem-chah-kah-myuhn
jimjakamyeon
Progressive (고 있어요)
짐작하고 있어요
cheem-chah-kah-goh ee-ssuh-yoh
jimjakago isseoyo
Want to (고 싶어요)
짐작하고 싶어요
cheem-chah-kah-goh shee-puh-yoh
jimjakago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
짐작할 수 있어요
cheem-chah-kahl soo ee-ssuh-yoh
jimjakal su isseoyo
Because / So (아/어서)
짐작해서
cheem-chah-kae-suh
jimjakaeseo
Noun form — (기)
짐작하기
cheem-chah-kah-gee
jimjakagi
Noun form — (음)
짐작함
cheem-chah-kahm
jimjakam