作业帮ago 和before 的区别
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/04/30 02:25:55
ago 和before 的区别
ago ,before 这两个词都可表示“在若干时间以前”,但用法不同,初学者容易搞错.
ago,应注意两点：(1)用于一般过去时,(2)它所指的时间是从现在算起.
A short while ago,my sister helped me to carry one of my old bookcases up the stairs.
片刻之前,我妹妹帮我把我的一个旧书柜抬上了楼.
It was stolen twenty years ago when Ted was a boy of fifteen.
那辆自行车是在20年前当泰德还是个15岁的小伙子时被偷去的.
before,也应注意两点：(1)它用于过去完成时,(2)它所指的时间不是从现在算起,而是从过去某一时刻算起,有时可以与previously换用
A short time before,great trees had covered the countryside for miles around.
在那时不久之前,高大的树木覆盖着方圆数英里的地方.
Last summer,I finally left the firm that I had joined eighteen years before.
去年夏天,我终于离开了从那时算起18年前我所参加的那个商行.
ago,应注意两点：(1)用于一般过去时,(2)它所指的时间是从现在算起.
A short while ago,my sister helped me to carry one of my old bookcases up the stairs.
片刻之前,我妹妹帮我把我的一个旧书柜抬上了楼.
It was stolen twenty years ago when Ted was a boy of fifteen.
那辆自行车是在20年前当泰德还是个15岁的小伙子时被偷去的.
before,也应注意两点：(1)它用于过去完成时,(2)它所指的时间不是从现在算起,而是从过去某一时刻算起,有时可以与previously换用
A short time before,great trees had covered the countryside for miles around.
在那时不久之前,高大的树木覆盖着方圆数英里的地方.
Last summer,I finally left the firm that I had joined eighteen years before.
去年夏天,我终于离开了从那时算起18年前我所参加的那个商行.