How +形容词+ a +名词+陈述语序
How+形容词或副词+陈述语序
What +名词+陈述语序
What+a+形容词+名词+陈述语序
What+ 形容词+复数名词+陈述语序
What+ 形容词+不可数名词+陈述语序
How clever a boy he is!
How lovely the baby is!
What noise they are making!
What a clever boy he is!
What wonderful ideas (we have)!
What cold weather it is!
感叹句的省略形式为：
What a clever boy (he is)!