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2021年12月英语六级语法用法之since的四种用法

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2021下半年英语六级词汇短语复习汇总

  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.

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