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题目
Since引导的从句一般要用什么时态.?
要全还有例句喔..
谢了..

提问时间:2020-07-22

答案
一般过去时.
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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