how you doing为什么用doing啊

how you doing为什么用doing啊 how you doing How are you doing How are you doing? how are you doing 还是how you doing? 翻译how are you doing? how are you ledies doing how are you doing翻译 Hello,how are you doing? how are you doing对么 what are you doing for vacation?doing为什么用ing形式啊 How are you doing these days?为什么用do的现在分词