can i help you 用yes,you can行吗?

can i help you 用yes,you can行吗? can I help you,sir?Yes.____. Can I help you?Yes.______. can i help you yes ,can you tell me ______ Can i help you 的回答是什么?是用Yes,please还是用Yes,you can? Can i help you?用先回答yes吗 what can i do for you Can I help you?.Yes,please.I want some pens. Can i help you?yes,i( )that dress. can i help you? ---Can I help you? “Can I help you? -Can I help you?