whenness时间性whenadv.什么时候；当 ... 时conj.然后；可是；当 ... 时pron.什么时候n.时间When the waves harshly stomping.当水浪暴躁的碰撞时。When did the earthquake occur?When will come the millennium?When did he turn professional?When you are old by---yeates当你年老时When will this mystery unfold?When was the reservation made?When will your holidays begin?When does the Disneyland open?When did Stamford Bridge open?