"她不是认真的！"

Translation: She is not serious!

[unueco]

I hope this isn't related to the previous declaration about getting married!!

[theimaginarygame]

Why is 是…的 used here?

[Patrick_Dark]

"是……的" is not being used here; "認真" is the word for "serious": https://en.wiktionary.org/wiki/%E8%AA%8D%E7%9C%9F#Chinese.

[hxuanmin]

Then what is 的 for?

[FuCnSW]

認真的 is a vocabuary, 的 is a meaningless function word but tells you this vocabuary is an adjective. 的 is put behind in every adjective, but sometimes you can hide it.

I'm native speaker, but sorry I can't tell you when some certain word can hide or not. Give you an example, for these 2 sentences, the meaning is different.

他很認真
Descibe he is a serious person(adjective here), or he fucuses on doing something(adverb here).
他認真的
Tend to describe he means it, not kidding(adjective here)

[wanderdugg]

I'm tired of having to guess randomly between 他 and 她. Both answers should be accepted when you have to write what you hear.

[Hedwigechouette]

"she isn't earnest" was rejected but should be accepted

[MiszzJaime]

"She doesn't mean it" should be accepted. It has the same meaning.

[Semeltin]

So, is this sentence meant as "she isn't being serious"?

[jim750574]

"she is not being serious" why not?

[ZhangtheGreat]

"She is not a serious person" should be accepted.

[FuCnSW]

Negative.

This sentence actually means she is kidding or she doesn't want the serious relationship with someone. It's not describing the personality.

她不是認真的
She is not serious
她是個不認真的人
She is not a serious person

[ChaosScroll]

this CHinese "de" is pissing me off