afraid

adj. ①害怕的[+of (doing) sth.] ②担心的[+to do sth.J  ③生怕

【辨析】  be afraid to do sth.    be afraid of doing sth.

be afraid to do sth.
强调因害怕而不敢做某事
be afraid of doing sth.
强调担心出现某种后果

一言辨义He is afraid to speak in public because he is afraid of making mistakes.他不敢当众说话,因为他担心犯错误。