发布时间:2011-02-20 16:18:24作者:知识屋
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.
2013-01-22
学电脑必懂的53个英文单词和缩写
从菜鸟到熟手-我的美国IT经历
walk的过去式
tool与tools用法上有什么区别,分别是什么意思
恶搞漫画:看MacBook Air如何拯救你
英文单词FREE示意、造句,用法
计算机设备名称英语词汇(2)
计算机常用英语汇总,电脑技术吧收集!
动词用法 > 关于be fortunate to do sth结构的说明