网友后面的改写是错误的：That's an explanation.However, that is not an excuse.
因为 however 是针对前文（没出现）的，不是针对 That's an explanation.的。
网友后面的改写是错误的：That's an explanation.However, that is not an excuse.
因为 however 是针对前文（没出现）的，不是针对 That's an explanation.的。
老师您好，请问：Engaging in a hobby like reading a book, making a patchwork quilt or even playing computer games can delay the onset of dementia, a US study suggests. Watching TV however doesn't count. 这句话中的however 用法是否有误？（however 用作连词，须用逗号与前或后隔开）这是一道专八改错题，题目中写作Watching TV but doesn't count. 答案将but 改成however，改动后是否依然有误呢？谢谢！