请老师剖析这个句子，谢谢。

Whatever important matter demandedhis attention elsewhere would have to wait.

请老师剖析这个句子，谢谢。

Whatever important matter demanded his attention elsewhere是名词性分句，作主语，谓语是would have to wait。其中的whatever由于修饰名词important matter,通常称为关系限定词，有些词典标为形容词。等于any...that，译为“任何....的事情/东西”。比如：I'll be happy to provide you with whatever assistance you may need.（我愿为你提供你可能需要的任何帮助）。这句中，whatever assistance you may need作with的宾语。你的原句等于Any other important matter that demanded his attention would have to wait。意为：任何需要他关注的其它事情都需要等待（“往后排“的意思）。说明他现在正在做的事情要紧、有优先权。