how lovely the day is! e.g. 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)!
