They are leaving for Beijing tomorrow.为什么用“are leaving”?
问题描述：
They are leaving for Beijing tomorrow.为什么用“are leaving”?
They will leave for Beijing tomorrow.可以换成这样吗?
答
go\come\leave\fly\stread,都要用现在进行时表示将来:可以用will+动词原形(go\come\leave\fly\stread),第二就是用be(am,is,are)+动词的ing形式going\coming\leaving\fling\streading.