Since引导的从句一般要用什么时态.?
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Since引导的从句一般要用什么时态.?
要全还有例句喔..
谢了..
要全还有例句喔..
谢了..
![Since引导的从句一般要用什么时态.?](/uploads/image/z/5053887-63-7.jpg?t=Since%E5%BC%95%E5%AF%BC%E7%9A%84%E4%BB%8E%E5%8F%A5%E4%B8%80%E8%88%AC%E8%A6%81%E7%94%A8%E4%BB%80%E4%B9%88%E6%97%B6%E6%80%81.%3F)
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.
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.