请问be afraid to do 和be afraid doing 有什么区别?那再请看一道题,选什么?I was afraid __to my customers because I was afraid __them.A.of talking back ,to loseB.to talk back,of losing

be afraid to do something=be unwilling to do something because you are frightened(因为害怕而不敢、不乐意做某事）；
be afraid of doing something= be worried or anxious about something that might happen(担心或忧虑某事可能发生）。
根据以上信息，可知应选B.

be afraid to do 是"害怕要做某事"
be afraid doing 是"做了某事而害怕"
B

选b
首先,be afraid是没有be afraid doing sth的
只有be afraid to do sth 和 be afraid of sth/doing sth
be afraid to do sth,不敢去做某事
be afraid of doing sth,一向害怕做某事,表示习惯.
两者的区别,我写个例句就知道了.
she was not afraid of dancing with strangers,but she was afraid to dance with Mr.Green tonight,because she thought him dangerous.
她不害怕和陌生人跳舞（指在舞会上,表示习惯）,但是今晚,她不敢和格林跳舞（很可能格林向她发出邀请,因为她觉得格林是个危险人物,不敢跳舞只是今晚这一次）