Verbseoul.
하다 verb (adj)
똑똑하다ttokttokhadasmart, clever, intelligent

To say smart, clever, intelligent politely in the present tense, use 똑똑해요 (ttohg-ttoh-kae-yoh). Below is the full conjugation of 똑똑하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
똑똑해
ttohg-ttoh-kae
똑똑해요
ttohg-ttoh-kae-yoh
똑똑합니다
ttohg-ttoh-kahm-nee-dah
Past
똑똑했어
ttohg-ttoh-kae-ssuh
똑똑했어요
ttohg-ttoh-kae-ssuh-yoh
똑똑했습니다
ttohg-ttoh-kae-sseum-nee-dah
Future
똑똑할 거야
ttohg-ttoh-kahl- -guh-yah
똑똑할 거예요
ttohg-ttoh-kahl- -guh-yae-yoh
똑똑할 겁니다
ttohg-ttoh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
똑똑하세요
ttohg-ttoh-kah-sae-yoh
Suggestion / Let's Polite (요)
똑똑해요
ttohg-ttoh-kae-yoh
Question Polite (요)
똑똑해요?
ttohg-ttoh-kae-yoh-?
Connective “and” — (고)
똑똑하고
ttohg-ttoh-kah-goh
Conditional “if” — (면)
똑똑하면
ttohg-ttoh-kah-myuhn
Noun form — (기)
똑똑함
ttohg-ttoh-kahm