关于before和after的用法1.The roof fell __he had time to dash into the room to save his baby.2.Time passed quickly and three weeks went by _we knew it.答案都是before,我怎么觉得用after 也一样符合逻辑啊

after和before的用法 before,after,until的用法与区别? before after when and while的用法 关于before的所有用法 请告诉我一下after和before的用法,后面接的东西和时态, before和after since的用法填完型时遇到这三个词,怎样判别 英语中before,after,when,until的用法和区别（最好有例子!） 英语翻译a.after b.when c.since d.before和 because of 与 because的用法 since after 和before的区别 （从用法 .语法 .等方面） not until怎样能用before和after的改写用法,分别例句 关于before和after的用法1.The roof fell __he had time to dash into the room to save his baby.2.Time passed quickly and three weeks went by _we knew it.答案都是before,我怎么觉得用after 也一样符合逻辑啊 before的意思和用法 几个英语单词的意思和用法：before long 、 long before 、long after、soon after能不能写出这几个词的常用句型,易懂点的. before与after的区别它们的用法 ago in after before的区别及用法 when before after 的用法可以 主将从现吗? 求语法中关于before的用法 until、after、before和since的区别、用法和意思谢谢每一个回答我的问题的人