long before和long long ago的区别是什么?

long before和long long ago的区别是什么? long before 和long ago的区别 long ago与long before的区别 long before 与long ago的区别 long ago and long before 的区别 long before和long long ago有什么区别 long ago 和 long before before long 和long before的区别 long before和before long的区别 before long 和long befor的区别 英语两个词组的区别long ago和long before 的区别 帮我看看这道语法题：long time ago 和 long before 的用法区别