what和how怎样变成感叹句（赞叹、赞美型的语言）

口诀“一分、二加、三换位、四去掉”
例
The book is very interesting.这本书非常有趣.
一分：The book is | very interesting.
二加：The book is |(how) very interesting.(感叹的是interesting,所以用how)
三换位：How very interesting the book is .
四去掉：How interesting the book is!(句中有very\quit的一般都去掉)