what's up ? sb.,用什么介词? 如：what‘s happended to sb. what's the matter with sb? what's

what's up ? sb.,用什么介词? 如：what‘s happended to sb. what's the matter with sb? what's what's up?什么意思? what s up 什么意思 what's-up?什么意思? What's up?什么意思? what's been up?和what's up?什么区别 what's sb be up to sb’s what's up什么意思来着 What's u up to 什么意思 what's up to you 什么意思跟what's up不一样,好象是这样! what about sb's 意思, What's up What’s up WHAT 'S UP What‘s up what's up man what s up