1) since +过去一个时间点 。
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.
联邦调查局调查克林顿竞选负责人电邮被黑事件
它可能是世上最惨的大熊猫 吃垃圾没人管 心酸
Tom’s Holiday
国内英语资讯:China Focus: Premier Li wraps up Macao visit, announces support measures
Zoom’s Weekend
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国内英语资讯:Senior CPC official meets foreign guests at economic governance seminar
国内英语资讯:China, Cambodia agree to advance close ties
国际英语资讯:Suspected U.S.-led air strike kills 15 civilians in Syrias al-Raqqa
国内英语资讯:Xi leaves for Cambodia, Bangladesh, BRICS summit
国内英语资讯:Interview: Cambodian politicians, scholars hail Chinese President Xis signed article on Si
国内英语资讯:China urges Australia to be cautious on S. China sea issue
双语阅读之精彩人生的11个快乐秘诀
联合国人权事务高级专员:川普将是“危险的”总统
国际英语资讯:Gene editing offers hope for curing sickle cell anemia
哥伦比亚总统延长与反政府武装的停火
国内英语资讯:CPC in Dialogue with the World 2016 opens in Chongqing
国内英语资讯:Full text of Chinese presidents signed article in Cambodian newspaper
联合国秘书长潘基文2016年世界精神卫生日致辞
有什么行之有效的学习习惯?
双语阅读之威廉王子变装啦
国内英语资讯:Dhaka gets facelift as euphoric reception awaits Chinas Xi to Bangladesh
My family
国内英语资讯:China, Sri Lanka vow to enhance legislative cooperation
又有5名女子指控川普性骚扰 丑闻持续升温!
A Farewell Party
国际英语资讯:Paramilitary trooper killed, 8 wounded in Indian-controlled Kashmir militant attack
美国袭击也门目标报复导弹袭击
国际英语资讯:Yemens Houthi rebels deny loss of border crossing
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