Having been done是现在分词的完成时的被动语态,用的时候常常会出现一个段时间状语。having been done强调动作发生在谓语动词表示的动作之前。Having been done一般强调被动的动作。 相关推荐: 高考英语知识点汇总 come on四种意思分别是 最新高考资讯、高考政策、考...
例:I haven't met that professor prior to today.(以前我从未见过那位教授。) 4. 现在完成进行时(have been doing) 用法:表示某一动作开始于过去某一时间,延续或重复地出现至今,或将继续延续至将来。 例:We have been working on this project for over a month now...
文章开篇提出主题,关于“the ability to focus without distraction”, 第二段开头说“a number of approaches”, 提出方法,第四段开头another approach,所以这篇文章重点还是在说方法,所以B选项approaches to getting more done in less time为正确答案。more done i...
A.havingbeenaddressedB.tohaveaddressed C.tohavebeenaddressedD.beingaddressed 12.TheSpaceShuttleColumbiabrokeintopiecesoverTexasasitreturnedtotheearthonFebruary1,2003, ___allsevenastronautsaboard. A.havingkilledB.killingC.beingkilledD.killed 13.Ther...
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