来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/07/13 20:41:40
初二英语题 急!谢谢!
1 He has not yet returned.
2 He will return in ten minutes.
3 When the concert ended,we went home.
拿be back替代1、2句中的return；拿be over替代3句中的ended
1 He has not yet been back.
2 He will be back in ten minutes.
3 When the concert was over,we went home.
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