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初中英语:since的四种用法

来源:新东方 编辑:angelje   可可英语APP下载 |  可可官方微信:ikekenet

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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