英语感叹句的结构?

What + a + 形容词 + 名词单数 (+ 主语+动词)!
What a beautiful girl she is!
What + 形容词 + 名词复数 (+ 主语 + 动词)!
What beautiful girls they are!
What + 形容词 + 不可数名词 (+ 主语 + 动词）!
What delicious milk it is!
How + 形容词/副词 (+ 主语 + 动词）!
How beautiful this girl is!
以上有点麻烦,简单记：
把感叹句从后面把主语和谓语（句子）挑出,然后看前面的感叹部分,若有名词,就用what；若无,就用how.但是注意单数时候：what a careful student she is!= How careful a student sh is!
练习：
_____nice it is today!
_____ a nice day it is today!
_____ ugly animals they are!
Keys:How; What:what
What a big box it is!== How big the box is!
What nice weather it is!== How nice the weather is!
What clean rooms they are!== How clean the rooms are!