现在完成时since的三种用法

2025-04-05 16:00:26

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. (在1989年我来到了这里)

2、since +一段时间+ agoI have been here since five months ago. (自从五个月前,我已经在这里了)

3、since +从句Great changes have taken place since you left.(自从你离开后,发生了很大的变化)Considerable time has elapsed since we have been here.(我们到这里已经过了很长时间了)

4、It is +一段时间+ since从It is two years since I became a postgraduate student.

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