2014年PETS二级考试:语法讲解(4)

2014-04-12 21:10:00来源:网络

  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.


更多>>
更多课程>>
更多>>
更多内容

英语学习资料大礼包

加微信免费领取电子版资料

生活口语流利说
更多>>
更多公开课>>
更多>>
更多课程>>