before和ago到底有什么区别呢?具体的用法有哪些?
问题描述：
before和ago到底有什么区别呢?具体的用法有哪些?
答
before指在某个时间或动作之前,一般放在具体时间或动作之前,例如
1.our work will be finished before 6:00pm;
2.they have been waiting for us before we get up.
而ago一般只是指时间之前,且位置在时间之后,例如
our work have been finished 6 hours ago.