下面是小学生写得一篇小作文: My friend Yu Peng has got the bicycle. He has bought it for five years. It is made in Wuhan. He bought it in a street market and ride it to school almost everyday. Some times he has to have it reparied. He said he is going to buy a new one made in Tianjin. 该生作业中有什么错误? 哪些错误应该纠正过来?用什么方法纠正比较合理? 教师如果把学生在作业中的错误都改过来,会给学生造成什么后果?