Common metre or common measure — abbreviated as C. M. or CM — is a poetic metre consisting of four lines which alternate between iambic tetrameter (four metrical feet per line, with each foot consisting of an unstressed syllable followed by a stressed syllable) and iambic trimeter (three metrical feet per line, with each foot consisting of an unstressed syllable followed by a stressed syllable), rhyming in the pattern a-b-a-b. The metre is denoted by the syllable count of each line, i.e. 184.108.40.206 or 86.86, depending on style, or by its shorthand abbreviation "CM". It has historically been used for ballads such as "Tam Lin", and hymns such as "Amazing Grace" and the Christmas carol "O Little Town of Bethlehem". The upshot of this commonality is that lyrics of one song can be sung to the tune of another; for example, "Advance Australia Fair", the national anthem of Australia, can be sung to the tune of "House of the Rising Sun".
Common metre is related to three other poetic forms: ballad metre, fourteeners, and common-metre double.
Like the stanzas of the common metre, each stanza of ballad metre has four iambic-lines. Ballad metre is "less regular and more conversational" than common metre. In each stanza, ballad metre needs to rhyme only the second and fourth lines, in the form A-B-C-B (where A and C need not rhyme), while common metre must rhyme also the first and third lines, in the pattern A-B-A-B.
Another closely related form is the fourteener, consisting of iambic heptameter couplets: instead of alternating lines of iambic tetrameter and iambic trimeter, rhyming a-b-a-b or x-a-x-a, a fourteener joins the tetrameter and trimeter lines, converting four-line stanzas into couplets of seven iambic feet, rhyming a-a.
The first and third lines in common metre typically have four stresses (tetrameter), and the second and fourth have three stresses (trimeter). Ballad metre follows this stress pattern less strictly than common metre. The fourteener also gives the poet greater flexibility, in that its long lines invite the use of variably placed caesuras and spondees to achieve metrical variety, in place of a fixed pattern iambs and line breaks.
Another common adaptation of the common metre is the common-metre double, which as the name suggests, is the common metre repeated twice in each stanza, or 220.127.116.11.18.104.22.168. Traditionally the rhyming scheme should also be double the common metre and be a-b-a-b-c-d-c-d, but it often uses the ballad metre style, resulting in x-a-x-a-x-b-x-b. Examples of this variant are "America the Beautiful" and "It Came Upon the Midnight Clear".
- Amazing Grace, how sweet the sound,
- That saved a wretch like me!
- I once was lost, but now am found,
- Was blind, but now I see.
- — from John Newton's "Amazing Grace"
William Wordsworth's "Lucy Poems" are also in common metre.
- A slumber did my spirit seal;
- I had no human fears:
- She seemed a thing that could not feel
- The touch of earthly years.
- — from William Wordsworth's "A slumber did my spirit seal"~
The first opening theme used on the dubbed version of the Japanese anime Pokémon also uses common metre.
- I wanna be the very best
- Like no one ever was
- To catch them is my real test
- To train them is my cause
- I will travel across the land
- Searching far and wide
- Each Pokemon to understand
- The power that's inside
Many of the poems of Emily Dickinson use ballad metre.
- Because I could not stop for Death,
- He kindly stopped for me;
- The Carriage held but just Ourselves
- And Immortality.
- — from Emily Dickinson's poem #712
Another American poem in ballad metre is Ernest Thayer's "Casey at the Bat":
- The outlook wasn't brilliant for
- The Mudville Nine that day;
- The score stood four to two, with but
- One inning more to play.
A modern example of ballad metre is the theme song to Gilligan's Island, infamously making it possible to sing any other ballad to that tune. The first two lines actually contain anapaests in place of iambs. This is an example of a ballad metre which is metrically less strict than common metre.
- Just sit right back and you'll hear a tale,
- a tale of a fateful trip.
- That started from this tropic port,
- aboard this tiny ship.
Another example is the folk song "House Of The Rising Sun".
- There is a house in New Orleans,
- They call the rising sun.
- And it's been the ruin of many a poor boy,
- And God, I know I'm one.
- The stretching arms, the yawning breath, which I to bedward use,
- Are patterns of the pangs of death, when life will me refuse:
- And of my bed each sundry part in shadows doth resemble,
- The sundry shapes of death, whose dart shall make my flesh to tremble.
- — from George Gascoigne's "Gascoigns Good Night"
"America the Beautiful" by Katharine Lee Bates employs the common metre double, using a standard CM rhyme scheme for the first iteration, and a ballad metre scheme for the second.
- O beautiful for spacious skies,
- For amber waves of grain,
- For purple mountain majesties
- Above the fruited plain!
- America! America!
- God shed his grace on thee
- And crown thy good with brotherhood
- From sea to shining sea!
- Foot (prosody)
- Hymns and hymn tunes
- Hymn tune
- Long metre
- Metre (hymn)
- Metre (poetry)
- Short metre
- Blackstone, Bernard., "Practical English Prosody: A Handbook for Students", London: Longmans, 1965. 97-8
- "common metre". Britannica Online Encyclopedia. Retrieved 2008-07-30.
- Kinzie, Mary. A Poet's Guide to Poetry. Chicago: The University of Chicago Press, 1999. 121-2, 414-5
- Horton, Ronald A. (1995). British Literature for Christian Schools. Bob Jones U. pp. 100–1, 718.