感叹句是表示喜、怒、哀、乐等感情的句子。感叹句一般用 how 或 what 开头。
一、 what 引导的感叹句结构有三种：
1． What + (a/an) + 形容词 + 可数名词单数 + 其它！
2． What + 形容词 + 可数名词复数 + 其他！
3． What + 形容词 + 不可数名词 + 其他！
例如：
(1) What a great pity you missed the lecture again！你又一次错过了讲座，真是太遗憾了！
(2) What interesting books you bought us! 你给我们买的书真有趣！
(3) What fine weather it is! 多么晴朗的天气呀！
二、 how 引导的感叹句结构有：
1. How + 形容词 + 主语 + 谓语！
2. How + 副词 + 主语 + 谓语！
例如：
(1) How beautiful the flowers are! 这些花是多么美丽呀！
(2) How heavily it is raining! 雨下得是多么大呀！
how 和 what 都用来引导感叹句，它们有什么区别呢? how 在这里是一个副词，用来修饰形容词和副词；而 what 是用来修饰名词的, 所以即使是同样的句子, how 和 what 引导的句子结构是不一样的。请看下列例句：
(1) 多美丽的一朵玫瑰花呀!
How beautiful a rose it is!
What a beautiful rose it is!
(2) 多晴朗的天气呀!
How sunny the weather is!
What sunny weather it is!
(3)这些学生是多么聪明呀!
How clever the students are!
What clever students they are!
【巩固练习】按要求改写下列句子。
1． Lucy is a very clever girl. (用 what 改写为感叹句)
2. Lily is a very beautiful girl. (用 how 改写为感叹句)
3． The students are playing basketball happily. (用 how 改写为感叹句)
4． The books are very new. (用 what 改写为感叹句)
5． The story is very interesting. (用 what 改写成感叹句)
6． The book is very interesting. (用 how 改写成感叹句)
7． Kangkang's lecture is wonderful. (用 how 改写成感叹句)
8． The news is very important. (用 what 改写成感叹句)
参考答案：
1. What a clever girl Lucy is!
2. How beautiful a girl Lily is!
3. How happily the students are playing basketball!
4. What new books they are!
5. What an interesting story it is!
6. How interesting a book it is! (How interesting the book is!)
7. How wonderful Kangkang's lecture is!
8. What important news it is!
我也是在百度里找别人给的这方面的回答，希望对你有用
参考资料：http://zhidao.baidu.com/question/72281840.html?si=1