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公共英语二级语法讲解(4)

|0·2010-09-30 21:14:38浏览0 收藏0

  since的四种用法

  1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。

  I have been here since 1989.

  2) since +一段时间+ ago

  I have been here since five months ago.

  3) since +从句

  Great changes have taken place since you left.

  Considerable time has elapsed since we have been here.

  4) It is +一段时间+ since从句

  It is two years since I became a postgraduate student.

公共英语二级语法讲解(3)

公共英语二级语法讲解(2)

公共英语二级语法讲解(1)

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