How+形容词/副词(+主语+动词)!如:How fast it flies!How beautiful it is!其中主语+动词可省略.
What+a/an+形容词+单数名词+it is!
或者是What +形容词+复数名词+they are!What +形容词+不可数名词+it is!其中it is/they are也可省略 比如：你可以说what a good day it is!也可省略为：what a good day!这是单数名词
复数名词：what handsome boys they are!可省略为what handsome boys.
不可数名词：what nice weather it is!可省略为what nice weather!