以下3题请帮忙看一下正确答案.被动,现完,翻译

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/07/05 17:29:35

以下3题请帮忙看一下正确答案.被动,现完,翻译
一共3题：
1.All these books need to be packed in to the boxes.
句里的need to be packed就是 need to be done的形式吧?主语是物,需要被做某事?
2A. The teacher was already in the classroom when I arrived.
2B. She had already left when I phoned.
2B能用现在完成时,为什么2A这句是用一般过去式was already ,而不是现在完成时been already ?2A能用现在完成时been already 吗?
3.他已经做完作业.以下翻译都对吗?
3a.He has finished his homework.
3b.He has done his homework.

1.All these books need to be packed in to the boxes.
句里的need to be packed是need to be done的形式
主语是All these books所有的这些书需要被整理到盒子里去
2A.The teacher was already in the classroom when I arrived.
2B.She had already left when I phoned.
2A这个形式也是现在完成时.加上been 只是被动态.首先left不能"被'离开.其次因为left是短暂性动词,不可以加延续性的
3.他已经做完作业.以下翻译都对吗?
3a.He has finished his homework.
3b.He has done his homework.
正确的!
再问：请问，2B是过去完成时吗？2A和2B都是什么从句呢？
再答：是的.2B是过去完成时.2A2B都是复合句,或者说时间状语从句
再问： The teacher was already in the classroom和She had already left是主句吗？when I arrived和 when I phoned是从句吗？
再答：是的~
再问： The teacher was already in the classroom when I arrived。请问这句也是现在完成时吗？
再答：不是的.现在完成时的结构是have done
再问： The teacher was already in the classroom when I arrived。那么就是一般过去时？
再答：是的,复合句的一般过去时

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