Verbseoul.
regular
놀아나다nolanadato fool around, to play around, to act imprudently

To say to fool around, to play around, to act imprudently politely in the present tense, use 놀아나요 (noh-rah-nah-yoh). Below is the full conjugation of 놀아나다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
놀아나
noh-rah-nah
놀아나요
noh-rah-nah-yoh
놀아납니다
noh-rah-nahm-nee-dah
Past
놀아났어
noh-rah-nah-ssuh
놀아났어요
noh-rah-nah-ssuh-yoh
놀아났습니다
noh-rah-nah-sseum-nee-dah
Future
놀아날 거야
noh-rah-nahl- -guh-yah
놀아날 거예요
noh-rah-nahl- -guh-yae-yoh
놀아날 겁니다
noh-rah-nahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
놀아나세요
noh-rah-nah-sae-yoh
Suggestion / Let's Polite (요)
놀아나요
noh-rah-nah-yoh
Question Polite (요)
놀아나요?
noh-rah-nah-yoh-?
Connective “and” — (고)
놀아나고
noh-rah-nah-goh
Conditional “if” — (면)
놀아나면
noh-rah-nah-myuhn
Noun form — (기)
놀아남
noh-rah-nahm