认真的英文careful

demure跟读认真的词典释义seriousadj.不好的；严重的；有危险的；需认真思考的；严肃的；重要的；须重视的例句1.他使得投票者相信了他是严肃认真的。He managed to convince voters that he was for real. 牛津高阶英汉双解词典2.他看见她玩这个游戏十分认真的样子，觉得好笑。He was amused to see how seriously she took the game. 牛津高阶英汉双解词典

形容一个人认真仔细的话，应该是形容词吧，如earnest（[ˈə:nist] 、郑重其事的，非常认真的）。careful的名词形式是carefulness。

careful 认真的 She always does homework carefully.serious 认真的，严肃的 You should think about this problem seriously.

hardly

earnest\serious