But后加到底能不能逗号,不懂的别瞎说

原则上,逗号间的插入语凭借逗号抵消了充当词组、从句的作用.引入独立分句时,要在and 或 but之前配置一个逗号.
若but后有主语（无论整个句子有一个或多个主语,主语是否一致）,在but之前加逗号.
例：McCain ran for president, but I did not vote for him.
McCain ran for president, but he did not win.
若but后没有主语,不要在but之前加逗号.
例：McCain ran for president but did not win.
文中两句子可能属于并列关系,故用逗号.否则应该换成however或去掉逗号