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高中英语重点词语辨析:before long与long before

2016-11-15 17:40:49 来源:佚名
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  高中英语重点词语辨析:before long与long before


  1.before long不久,很快。如:


  I'll be back before long.不久我就回来。


  Before long he got married.不久他就结婚了。


  2.long before


  (1)老早,早就(单独使用,表示比过去某时早得多的时间)。如:


  She had left long before.她老早就离开了。


  That had happened long before.那事老早就发生了。


  注:long ago表示“很久以前”,指的是从现在算起的很久以前,通常与一般过去时连用:


  I met him long ago.我很久以前就认识他了。


  (2)在……的很久以前,在还没有……的很久以前。如:


  She had left long before his return[he returned].在他回来的很久以前她就走了。


  He had worked in the factory long before he got married.在他还没有结婚的很久以前他就在这家工厂工作了。


  注:此时的主句谓语通常用过去完成时,但有时也可用一般过去时(因为before已体现了动作的先后关系)。如:


  This happened long before you were born.这事在你还没出生以前很久就发生了。


  It is[was,will be]long before......在……前需要很久。如:


  It was long before he came back.过了好久他才回来。


  It won't be long before we see each other.不久我们又会见面的。


  比较:


  It wasn't long before he realized his mistake./Before long he realized his mistake.不久他意识到了自己的错误。

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