请教老师，这句话：The referee heard the gibes from the crowd, but,ever the professional, ignored them.中ever the professional该怎么样理解呢,ever这里是副词么，和后面的 the professional语义上是什么关系呢？谢谢老师解答？
你的句子中的ever是词典的如下使用方法：
《韦氏高阶》副词 ever : formal : at all times
He is ever [=always] faithful.
moving ever westward
a guard who is ever watchful = an ever-watchful guard
你的句子：The referee heard the gibes from the crowd, but, ever the professional, ignored them. = The referee heard the gibes from the crowd, but, （being) ever the professional, ignored them. 即这个句子but并列二个谓语动词，第二个谓语动词被省略了being是什么原因状语修饰。
