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

To say smart, clever, intelligent politely in the present tense, use 영리해요 (yuhng-nee-hae-yoh). Below is the full conjugation of 영리하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
영리해
yuhng-nee-hae
영리해요
yuhng-nee-hae-yoh
영리합니다
yuhng-nee-hahm-nee-dah
Past
영리했어
yuhng-nee-hae-ssuh
영리했어요
yuhng-nee-hae-ssuh-yoh
영리했습니다
yuhng-nee-hae-sseum-nee-dah
Future
영리할 거야
yuhng-nee-hahl- -guh-yah
영리할 거예요
yuhng-nee-hahl- -guh-yae-yoh
영리할 겁니다
yuhng-nee-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
영리하세요
yuhng-nee-hah-sae-yoh
Suggestion / Let's Polite (요)
영리해요
yuhng-nee-hae-yoh
Question Polite (요)
영리해요?
yuhng-nee-hae-yoh-?
Connective “and” — (고)
영리하고
yuhng-nee-hah-goh
Conditional “if” — (면)
영리하면
yuhng-nee-hah-myuhn
Noun form — (기)
영리함
yuhng-nee-hahm