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was changed和has changed ; have been和had been ; have done 和 has done 区别。
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推荐答案 2011-05-17
was changed 是change的过去式的被动式
has changed 是change的
现在完成时
have been 是现在完成时的被动式
had been 是
过去完成时
的被动式
have done 是 现在完成时 (用于第一,二人称单数或者所有人称的复数形式)
has done 是现在完成时 (用于第三人称单数形式)
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其他回答
第1个回答 2011-05-17
was changed 谁谁 被改变
has changed (现在完成时)
had been (过去完成时)
have done (第一人称 如我 , 已经 做过 什么事)
has done (第三人称,如她,已经做过什么事)
加分呐O(∩_∩)O~
追问
还有一个 have been~谢谢~
第2个回答 2011-05-18
第一个用被动语态;只要记住has只用于第三人称单数;have been用于现在完成时,had been用于过去完成时,表示过去已经完成了的。…我无语了
第3个回答 2011-05-17
过去试,完成时;完成时,过去完成时;完成时,一个主语是复数一个是单数
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have been和have
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have been表示已经完成或来过
,是现在完成时的被动语态;have done表示做了不必做的事,是现在完成时的主动语态。 扩展资料 一、have been的含义及用法 have been意为来过,表示已经完成,是现在完成时的被动语态。例句有: 1、We took it as read ...
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