请问"hao are you"与"hao are you doing"有何不同?

请问hao are you与hao are you doing有何不同? Hao are you?是什么 hao are you hao old are you hao are you没有 hao are you翻译 hao old are you hao old are you? hao are you 请问”go ahead与go right ahead意思与用法有何不同?还有”hao are you 与hao are you doing意思与用法有何不同? hao are you 怎么回答 hao are you?什么意思 是hao are about your还是hao are about you hao are Hao,are. Hao do you do 和Hao are you 的区别? hao hao