meant to do 为什么省do?

meant to do 为什么省do? meant to do I meant to do I meant to do sth.还是 I meant doing sth. is/ was meant to do something. be meant to do 的意思 请问be meant to do ,mean to do的区别 i didnt mean to do还是meant to do? mean to do /mean doing /meant to do /meant doing 求辨析 meant to do和had meant to do的区别是什么 had meant to do =meant to have done 表示本来打算做但没做成. meant to do和meant to have done有什么区别