whose else , whose为疑问代词， else为形容词

whose else“还有谁的”

Whose else signature could I get?  

还有哪些人的署名我可以取得 呢 ?

Whose else could it have been?  

它还能是别的什么人的 呢 ?

不定代词+else,修饰不定代词，和疑问代词what/who，必须后置

If I can't make a living at painting, at least I can teach someone else to paint 

如果我不能靠画画谋生，至少我可以教别人画画。

We had nothing else to do on those long trips. 

在那些漫长的旅程中我们没有别的事情