you are taking so long为什么用进行时

you are taking so long为什么用进行时 If I were you,I'd sleep after taking a long walk.为什么要用taking As long as you are so be you are taking a big risk driving so fast 中taking 是动名词还是现在分词 How long are you staying 为什么用are和staying. []are you taking care[] what are you taking Are you taking pictures? Which flight are you taking?为什么不说Which flight“do”you taking? Are you taking any medicine?medicine为什么不用复数 Are you taking any medinice?medinice为什么不用复数 which bus are you waiting/taking?为什么是taking而不是waiting?