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小升初必备语法:since的四种用法

日期:2013-6-26 15:09 阅读:

 

  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.

Tags:小升,必备,语法,since,四种