How tall he was!
How fast he was running!
How happy Eddie looks!
4.这是一本多么有用的书啊!
What an interesting book it is!————————————
5.这本书真有用!
How important this book is!———————————
6.多重要的信息啊!
How important information it is!————————————
7.多美的花啊!
How beautiful flowers they are!————————————
HOW 后面加的是形容词
What 后面加的是名词
希望能够帮到楼主