Verbseoul.
하다 verb
추측하다chucheukhadato guess, to surmise, to conjecture

To say to guess, to surmise, to conjecture politely in the present tense, use 추측해요 (choo-cheu-kae-yoh). Below is the full conjugation of 추측하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
추측해
choo-cheu-kae
추측해요
choo-cheu-kae-yoh
추측합니다
choo-cheu-kahm-nee-dah
Past
추측했어
choo-cheu-kae-ssuh
추측했어요
choo-cheu-kae-ssuh-yoh
추측했습니다
choo-cheu-kae-sseum-nee-dah
Future
추측할 거야
choo-cheu-kahl- -guh-yah
추측할 거예요
choo-cheu-kahl- -guh-yae-yoh
추측할 겁니다
choo-cheu-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
추측하세요
choo-cheu-kah-sae-yoh
Suggestion / Let's Polite (요)
추측해요
choo-cheu-kae-yoh
Question Polite (요)
추측해요?
choo-cheu-kae-yoh-?
Connective “and” — (고)
추측하고
choo-cheu-kah-goh
Conditional “if” — (면)
추측하면
choo-cheu-kah-myuhn
Noun form — (기)
추측함
choo-cheu-kahm