What a clever boy he is!
多么聪明的小男孩啊!
How clever the boy is!
这小男孩多聪明啊!
1What引导的感叹句
What a beautiful city it is!
(这是个)多么美丽的城市啊!
句型：(1)what + a/an +形容词+单数可数名词+陈述句(主语+谓语)
What a beautiful city it is!
What an interesting story she told!
(2)what+形容词+复数可数名词/不可数名词+陈述句(主语+谓语)
What expensive watches they are!
What terrible weather it is!
2how引导的感叹句
How hot it is today!今天天气多么热啊!
1.句型：(1)How+形容词/副词+陈述句(主语+谓语)
How cold it is!
How hard he works!
(2)How+陈述句(主语+谓语)
How he loves his son!
(3)How+形容词+a/an+单数可数名词+陈述句(主语+谓语)
How tall a tree it is!
2.how修饰动词时，动词并不提前。
How I want to be a teacher!
我多想当个老师啊!
上述两种感叹句可以互相转换。例如：
What a clever boy he is!→How clever the boy is!
What a cold day it is!→How cold it is!
注意
what和how引导的两种感叹句，在口语中常用简略式，即省略后一部分(陈述句部分)如：
How cold!
多冷啊!
What heavy traffic!
交通多挤啊!
比较
感叹句和特殊疑问句
感叹句：How busy you are!(陈述句语序)
你多么忙啊!
疑问句：How busy are you?(疑问句语序)
你有多忙?
这两种句子的根本区别在于：感叹句后面是陈述句语序，而疑问句的语序要颠倒。
