Metric poetry, free verse and prose poetry. This is classified according to the phonological meter and structural form of the language of the work.
(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 metrical poems, quatrains and songs in China's ancient poems and the European sonnets.
A sentence in a poem is not based on a period.
Especially modern poetry!