since的用法归纳总结(since的用法总结)

导读 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 ...

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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