作业帮改为被动语态：1.He has worked out the problem.2.We have planted mor
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/12 04:12:34
改为被动语态：1.He has worked out the problem.2.We have planted more than 100 young trees.3.We must keep our classroom clean and tidy 4.My mother bought me a new sweater last Friday.
1.The problem has been worked out by him.
2.More than 100 young trees have been planted by us
3.Our classroom must be kept clean and tidy
4.I was bought a new sweater by my mother last Friday.
或是 A new sweater was bought for me by my mother last Friday
2.More than 100 young trees have been planted by us
3.Our classroom must be kept clean and tidy
4.I was bought a new sweater by my mother last Friday.
或是 A new sweater was bought for me by my mother last Friday
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