Verbseoul.
하다 verb
의심하다uisimhadato doubt

To say to doubt politely in the present tense, use 의심해요 (ui-sheem-hae-yoh). Below is the full conjugation of 의심하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
의심해
ui-sheem-hae
의심해요
ui-sheem-hae-yoh
의심합니다
ui-sheem-hahm-nee-dah
Past
의심했어
ui-sheem-hae-ssuh
의심했어요
ui-sheem-hae-ssuh-yoh
의심했습니다
ui-sheem-hae-sseum-nee-dah
Future
의심할 거야
ui-sheem-hahl- -guh-yah
의심할 거예요
ui-sheem-hahl- -guh-yae-yoh
의심할 겁니다
ui-sheem-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
의심하세요
ui-sheem-hah-sae-yoh
Suggestion / Let's Polite (요)
의심해요
ui-sheem-hae-yoh
Question Polite (요)
의심해요?
ui-sheem-hae-yoh-?
Connective “and” — (고)
의심하고
ui-sheem-hah-goh
Conditional “if” — (면)
의심하면
ui-sheem-hah-myuhn
Noun form — (기)
의심함
ui-sheem-hahm