It's impolite to make noise while ____ noodles in some countries.为什么用eating而不是用to eat
问题描述：
It's impolite to make noise while ____ noodles in some countries.为什么用eating而不是用to eat
答
eating
因为这里的while可以看作一个介词,
介词后面加宾语,宾语就是相当于名词的词语充当,动名词可以充当名词的,
eating就是一个动名词,
就是这个考点.
肯定对