感叹句结构？

what加冠词（a ,an, the）加形容词。如：What a beautiful flower!
What a naughty cat!
how加形容词，加名词再加be动词。如：How beautiful the flower is!
How naughty the cat is!

what后面修饰名词，how修饰形容词或者副词。
比如：What a good book it is.
How good the book is.

感叹句：what/how+数量/a/an+量词+物