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问题: 找出错处并翻译各句;;

找出错处并翻译各句
1.They are putting up the scaffolding.

2.You used to go swimming when you were at

college,usedn't you?
usedn't能否换为didn't

3.They fould that a stream had formed in the field.

解答:

1.up去掉 putting up是演戏的意思putting是摆放的意思
2.应该可以
3.had formed 之间加进been此题为完成时态的被动语态 题目中小溪应为被形成,本身是不能形成溪水的