What is the author's style in Words for Departure by Louise Bogan?

A narrative poem is a poem that tells a story or recounts events. Bogan's poem tells the story of her lover's departure from her life. However, Bogan makes this structure her own by refusing to tell the story in a straight chronological form. Instead she shifts time in her narrative and creates tension and complexity in her story. The story ends with the poet's recognition that she cannot change what is happening. Her lover will leave in spite of her words and neither her love for him nor her anger at his actions will change what is happening.