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!

由what引导的感叹句
　　what修饰名词或名词短语，有以下两种形式：
　　1. What+a(an)+（形容词）+单数可数名词+主语+谓语！如：
　　What an apple this is!
　　What a fine day it is!
　　2. What+(形容词）+可数名词复数或不可数名词+主语+谓语！
　　What kind women they are