Verbseoul.
하다 verb
못하다mothadacannot (do)

To say cannot (do) politely in the present tense, use 못해요 (moh-tae-yoh). Below is the full conjugation of 못하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
못해
moh-tae
못해요
moh-tae-yoh
못합니다
moh-tahm-nee-dah
Past
못했어
moh-tae-ssuh
못했어요
moh-tae-ssuh-yoh
못했습니다
moh-tae-sseum-nee-dah
Future
못할 거야
moh-tahl- -guh-yah
못할 거예요
moh-tahl- -guh-yae-yoh
못할 겁니다
moh-tahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
못하세요
moh-tah-sae-yoh
Suggestion / Let's Polite (요)
못해요
moh-tae-yoh
Question Polite (요)
못해요?
moh-tae-yoh-?
Connective “and” — (고)
못하고
moh-tah-goh
Conditional “if” — (면)
못하면
moh-tah-myuhn
Noun form — (기)
못함
moh-tahm