1.What + a + adj.+ 单数名词（+主谓）!What a good book It is!
2.What + adj.+ 复数名词（+主谓）!What good books they are!
3.What + adj.+ 不可数名词（+主谓）!What good food it is!
4.How + adj./adv.(+主谓）!How good (the book is)!How fast he runs!
5.How + adj.+ a + 单数名词 （+主谓）!How good a book it is!