2014年英语六级语法精要:since和for的用法

2014-04-15 13:47:38来源:网络

  2014年英语六级考试就要来了,下面是小编为大家整理的2014年英语六级语法精要,供各位考生参考。

  since和for的用法:

  since 用来说明动作起始时间,for用来说明动作延续时间长度;

  eg:I have lived here for more than twenty years.

  I have lived here since I was born.

  for后面多接一段时间,而since后面则接一个时间点,若since后面也出现时间段,则在时间段后加ago;

  eg: I have lived here since twenty years ago.

  错句:I have worked here since many years.

  since句型:

  It is +一段时间+ since从句,since从句要用一般过去时;

  eg:It is two years since I became a postgraduate student.

  It is three years since I joined the army.


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