Question

he went shopping with hermother last night改为疑问句？

Answer 1

he went shopping with hermother last night改为疑问句？
个人认为原句有误，句子主语和后面的形容词性物主代词不一致，如果句子主语是he, 后面的形容词性物主代词应该是his , 如果后面的形容词性物主代词是her, 前面句子主语应该是she .
其次，改为疑问句指代不明，不知是改为一般疑问句还是特殊疑问句。
He went shopping with his mother last night改为一般疑问句是 ：Did he go shopping with his mother last night？
改为特殊疑问句分别是：
When did he go shopping with his mother ？
What did he do with his mother last night？

Answer 2

这句话，谓语动词是go shopping(购物）所以改疑问句用do，因为是过去式。所以，改成疑问句就是，
Did he go shopping with her mother last night？

Answer 3

Did he go shopping with her mother last night?
(he应该是she；或者her应该是his才合适）