(1) Metric poetry: It is a poem written according to certain formats and rules. It has strict rules on the number of lines, the number of words (or syllables), the tone and rhyme, the antithesis of words and the arrangement of sentence patterns. , such as the "sonnets" in Europe.
(2) Free verse: it is a newly developed poetic style in modern Europe and America. It is not limited by metrical rules, has no fixed format, pays attention to natural and internal rhythm, and uses rhymes roughly similar or without rhymes. The number of words, lines, sentence patterns and tones are relatively free, and the language is relatively popular. Whitman, an American poet (1819-1892), is the founder of European and American free verse, and Leaves of Grass is his main collection of poems.
(3) Prose poetry: it is a literary genre with both prose and poetry characteristics. The works are full of poetry and passion, often full of philosophy, and pay attention to the rhythm of nature and the beauty of music. They are short and don't rhyme like prose.