以下3题请帮忙看一下正确答案.被动,现完,翻译
3个回答

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!