How +形容词+ a/an +名词+ 陈述语序
How+形容词或副词+ 陈述语序
What +形容词+可数名词复数或不可数名词 + 陈述语序
What+a/an+形容词+名词单数 + 陈述语序
如
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!
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