感叹句中how与what的句型
“what + a/an + 形容词 + 名词（单数）+ 主语 + 谓语”的结构如下：
“what + 形容词 + 名词（复数、不可数）”以及“how + 形容词或者副词 + 主语 + 谓语”的结构如下：
What a fine day it is!
What an interesting book it is!
What fine books they are!
What fine weather it is today!
How good the book is!
How hard he studies!
