下面是某教师的课堂教学片段：

　　T: What did your mum do yesterday, Wang Lin?

　　S: My mum buyed the dress for me.

　　T: Oh, that is nice. Your mum bought it for you, did she?

　　S: Yes.

　　T: Where did she buy it?

　　S: She buyed it in town.

　　T: Oh, she bought it in town for you. Well, it is very nice.

　　请根据所给材料回答下列三个问题。

本题考查教学中的语言错误。

考生根据法错误，用错了动词过去式的形式，即可以找出来。