副词在完成时中应该放在have后还是在have been后?

如果谓语动词前有一个或更多的助动词,则副词应放在第一个助动词之后.例如：
I have never been to Beijing.我从未去过北京.
We have just been talking about you.我们刚刚谈到你.
The operation has already been performed.手术已经做完了.