Water is to fish what air is to man!中what air is to man是什么语法功能?
问题描述：
Water is to fish what air is to man!中what air is to man是什么语法功能?
答
what（用于表对比）意为“犹如，好比”常用于“a is to b what c is to d[a 对于b来说犹如c对于d]”
Water is to fish what air is to man!水对鱼来说好比空气对于人！
答
同位语从句 what air is to man的语法功能是解释同半句。
答
Sth be to sth what sth be to sth.这是一个固定的句型．
．．对．．就如．．对．．．
这个句子是：水对于鱼就如空气对于人（一样重要）．