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. 小编推荐: 2012年全国公共英语等级考试报名时间汇总 2012年9月公共英语三级考试口语专项练习汇总 |