Frost is often called an "alternative poet", which means that he is in a period of alternation between traditional poetry and modernist poetry. He and thomas eliot are called the two centers of modern American poetry. Representative works: Selected Poems, A Tree Testimonies, Mountains, New Hampshire, Xixi, Another Pasture, glade in the Woods, and poetic dramas The Mask of Reason, The Mask of Sympathy, The Complete Poems and The Road Not Taken.