根据题目要求完成下列任务，用中文作答。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。(1)学生在对话中的语言错误是什么?(6分)(2)该教师采用什么方式来纠正学生的错误?效果如何?(12分)(3)教师还可以采用哪些方式纠错?请举例说明。(12分)
