benefit的形容词是beneficial;名词是benefit;副词是beneficially。Benefit用作名词、及物动词、不及物动词,作及物动词时意为“有益于,对…有益”。作不及物动词时意为“受益,得益”。作名词时意为“利益,好处;救济金”。例句:I have done it for his benefit.我为了他的利益才做那件事情。It is there for your benefit whether you feel it or not.这都是为了你们的利益,不论你们是否感受到了。