<P>John Ashbery writes like no one else among contemporary American poets. In the construction of his intricate patterns, he uses words much as the contemporary painter uses form and color- words painstakingly chosen as conveyors of precise meaning, not as representations of sound. These linked in unexpected juxtapositions, at first glance unrelated and even anarchic, in the end create by their clashing interplay a structure of dazzling brilliance and strong emotional impact. From...