The structure of Haiku is as follows: -there can be only 3 lines -17 syllabels in total (5 syllables in the first line, 7 syllables in the second and 5 syllables in the third line), -you don't have to be strict about punctuation and capitalization, it's up to you how to use them, -haiku poems don't have to rhyme -usually nature is the subject -in the first and third line images or ideas should be presented