What are some examples of form in a poem?

Two very common poetic forms are "couplets and three-line stanzas"

If you would like more examples you may scroll down to the "explanation" half of this answer :)

Explanation:

EXAMPLES:

Epic – lengthy narrative poem, ordinarily concerning a serious subject containing details of heroic deeds and events significant to a culture or nation... Sonnet – poetic form which originated in Italy; Giacomo Da Lentini is credited with its invention. Jintishi – "Modern Poetry", was composed from the 5th century onwards and it is considered to have been fully developed by the early Tang dynasty... Villanelle – nineteen-line poetic form consisting of five tercets followed by a quatrain... Tanka – a classical Japanese poem, composed in Japanese (rather than Chinese, as with kanshi) Ode – a poem written in praise of a person (e.g. Psyche), thing (e.g. a Grecian urn), or event Ghazal – an Arabic poetic form with rhyming couplets and a refrain, each line in the same meter Haiku – a poem, normally in Japanese but also in other languages (particularly English), normally with 17 syllables arranged as 5 + 7 + 5 Free verse - an open form of poetry which does not use consistent meter patterns or rhyme, tending to follow the rhythm of natural speech

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