polite的副词形式是什么?

例句：

She began speaking politely, even correctly.

她开始礼貌地讲了起来，甚至还很得体。

They spoke to me very seriously but politely.

他们非常严肃但又很有礼貌地与我谈话。

He offered the boys some coffee. They declined politely.

他要给男孩们来些咖啡。他们礼貌地拒绝了。