whenuan.土地whenadv.什么时候；当 ... 时conj.然后；可是；当 ... 时pron.什么时候n.时间When will you is in?When the sky gets whiter当天空变的更白When you start a program当您启动程序时when so she doth display却在那关键时刻，When did we arrive ?When you say let's elopeWhen did they leave?When is the deadline?When goods fork at bottom货叉最低时When will be come in?