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标题: 比较since和for [打印本页]

作者: x-ace    时间: 2009-12-25 13:00     标题: 比较since和for

  Since 用来说明动作起始时间,for用来说明动作延续时间长度。
  I have lived here for more than twenty years.
  I have lived here since I was born..
  My aunt has worked in a clinic since 1949. 
  Some new oilfields have been opened up since 1976.
  I have known Xiao Li since she was a little girl. 
  My brother has been in the Youth League for two years. 
  I have not heard from my uncle for a long time.

  注意:并非有for 作为时间状语的句子都用现在完成时。
   I worked here for more than twenty years.
   I have worked here for many years.   

  小窍门: 当现在完成时+一段时间,这一结构中,我们用下面的公式转化,很容易就能排除非延续动词在完成时中的误使。
  1) (对) Tom has studied Russian for three years.
    = Tom began to study Russian three years ago, and is still studying it now.
  2) (错) Harry has got married for six years.
    = Harry began to get married six years ago, and is still getting married now.
  显然,第二句不对,它应改为 Harry got married six years ago. 或 Harry has been married for six years.
作者: mcvswh    时间: 2010-1-11 10:38

楼主好强啊 全是你的贴!!!
作者: contrance    时间: 2010-1-31 23:13

作者: lzy_westlife    时间: 2010-2-2 00:21

作者: SUPPLY    时间: 2010-2-6 11:59


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