2012年公共英语二级考试写作语法解析2

全国等级考试资料网 2023-05-31 02:53:10 43

2012年公共英语二级考试写作语法解析2

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.来自

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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