本句使用howwhat 和how都可以引导感叹句（感叹句以感叹号结尾为主要标志）句型为：what:
1.what +a/an +adj. +n.+其他！
What an interesting story it is !
2.what +adj. +可数名词复数（或不可数名词）+ 其他！
What fine weather it is today!
What beautiful presents these are!how:
1.how + adj./adv +主语 +谓语！
How handsome he is ! How hard they are working!
2.如果一...
