Tom's mother asked ,"Tom,why have you made mistakes in your homework this time?"把这句话变成直接引语

问题描述:

Tom's mother asked ,"Tom,why have you made mistakes in your homework this time?"把这句话变成直接引语

Tom's morther asked him that whyhe had made mistakes in his homework that time.
个人觉得,第一个句子就有问题,mistake 可数名词不可单独使用的.