much as 与much though在引导让步状语从句的时候有什么区别?可以相互替换吗?

much as 和 much though 其实是把much提到了as 和though的前面 构成的倒装结构。比如Though he is clever= clever as/though he is Though he is a boy = boy as/though he is Though he can eat much = much as/ though he can eat两个结构意思一样,可以互换。