"She is not serious!"

Translation: 她不是认真的！

[theimaginarygame]

Why is 是…的 used?

[soyunpenguino]

认 (recognize) + 真 (real/true/genuine) = 认真 (serious)

[Nivkotzer]

Thanks

[Erikku15]

為什麼我需要“的”

[JustusRobi3]

Would it be grammatically correct if you omit 是 and / or 的?

[JOEXE]

Why so serious?