whatever融合型关系限定词

The teacher introduce the method in whatever ways necessary.

老师好！这里的whatever是融合型关系限定词吗？necessary前面是否省略了are?

whatever除去可以是融合型关系限定词（引导名词性关系分句）外，还可以是普通的限定词（传统语法称为形容词），作名词的限定词（传统语法称为定语）。比如下面词典例句：

She will buy the painting at whatever price.

For whatever reason, he refused to speakto us. [=he refused to speak to us for some reason that we don't know]
你的句子中，whatever就是这种普通限定词（形容词) 使用方法，不是引导名词性关系分句。