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hAD BEEn DonE

had been done 表示过去的过去,是过去完成的被动态时。(当你想说发生在过去的两件事时,就要分清谁先谁后。先发生的用过去完成时,后发生的要用过去时)。 如:The rooms had been cleaned when I came. 我来的时候,房间已经被打扫了。 have/...

had been done过去某个时间之前已经被做、被完成 had been doing过去某个时间之前已经在做或者继续在做 had be done是错的。时态和语态多不对。 had being done也是错误的。时态和语态都不对。 had纯粹的过去动作。

have\has done 叫现在完成时。表示动作发生在过去,对现在有一定的影响。通常与时间段连用。 如:I have finished my homework. / It has rained for three days. had done 是过去完成时。表示动作发生在过去的过去。通常句中有过去时间状语作参...

was done was done是一般过去时的被动语态was/were done之一。英语分为主要的八大时态,两大语态。其中,一般过去时即谓语动词为过去式,表示一个过去发生的动作,而被动语态是表示主语被怎样,其中主语是动作的被执行者即动作承受着。二者匹配...

had been done 过去完成时 过去某个时间之前就已经完成 例如,All of my execises have been done when you asked me yesterday. 昨天你问我的时候,我的作业已经做完了。 have been done现在完成时 到现在为止已经完成 例如,All of my execise...

have done是现在完成时的主动语态,表示从过去某个时间点一直持续到现在一直在做某一件事; have been done 是现在完成时的被动语态,表示从过去某个时间点到现在一直被做某事。

这两个结构都是现在完成时,have been done为被动语态,have done为主动语态。 现在完成时表示过去发生的动作或状态对现在的影响或产生的结果,跨在两个时间之上,一是过去,二是现在。 The train for Kaohsiung has already arrived. 前往高雄...

1、首先要区分has been done与 had been done的区别:have/has been done 是现在完成时的被动语态。表示某事被做,。 如:The problems have been solved.这些问题已经被解决了。 had been done 则是过去的过去,是过去完成的被动态时...

Have/Has been done 与Have/Has done 的区别前者是被动,后者是主动 给你举个例子吧: 比如说:我已经完成了任务,可以说:I have finished the task.这是主动 如果说任务已经被完成了,你可以说:The task has been finished

his bicycle had been found这句话。为什么要用过去完成? 因为再过去之前就被发现了。 如果用his bicycle was been found不就行了吗? 这种用法是错误的。只可能是his bicycle has been found

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