Types of feet:

monometer: one foot

Adam

had’em

(- a short trochaic monometer – O. Nash, Fleas)

Gods chase
Round vase.
What say?
What play?
Don’t know
Nice, though. (another trochaic monometer – D. Skirrow, Ode on a Grecian Urn Summarised)

dimeter: two feet

Half a league, half a league,
Half a league onward,
All in the valley of Death
Rode the six hundred.
(a dactylic dimeter – Alfred Lord Tennyson, The Charge of the Light Brigade)

trimeter: three feet

Go, Soul, the body’s guest,
Upon a thankless errand;

(W. Ralegh, The Lie)

tetrameter: four feet

If all the world and love were young,
And truth in every shepherd's tongue,
These pretty pleasures might me move
To live with thee and be thy love (iambic tetrameter – W. Ralegh, Answer to Marlowe)

pentameter: five feet

Shall I compare thee to a summer's day?
Thou art more lovely and more temperate

(iambic pentameter – W. Shakespeare, Sonnet XVIII)

hexameter: six feet

This is the forest primeval. The murmuring pines and the hemlocks,
Bearded with moss, and in garments green, indistinct in the twilight,”
( Henry Wadsworth Longfellow, Evangeline: A Tale of Acadie)

heptameter: seven feet.

Yes, makin' mock o' uniforms that guard you while you sleep
Is cheaper than them uniforms, an' they're starvation cheap

(iambic heptameter – R. Kipling, Tommy)

Line Groupings and Stanzas

When two rhyming lines get together, they form a couplet. If they happen to be lines of iambic pentameter--as couplets very often are--then they form a heroic couplet.

A tercet is a group of three lines. The most famous tercet form is the Italian terza rima, the form of Dante's Divine Comedy, which uses the interlocking rhyme scheme aba bcb cdc . . . .

A quatrain is a group of four lines. Ballad stanzas are quatrains, but many other kinds of poems use quatrains, too, with all conceivable variations of rhyme scheme. Shakespearean sonnets consist of three quatrains and a couplet.

Those are the most common groupings, but the sestet, or group of six, and octave, or group of eight, should also be known because they are the building blocks of the Petrarchan sonnet.

Doggerel – verse considered of little literary value.

Hogamus, higamus

Men are polygamous;

Higamus, hogamus

Women, monogamous.

Blank verse – the technical name for unrhymed iambic pentameter — i.e., verse of five feet per line, with the stress on the second beat of each foot. It's one of the most common kinds of verse in English: many passages of Shakespeare's plays are in blank verse, as is Milton's Paradise Lost and Wordsworth's Prelude.

Free verse — most common in the twentieth century, but by no means unique to it — has no fixed metrical foot, and often no fixed number of feet per verse.

Verse paragraph – a stanza of irregular length

Lines can be either end-stopped or enjambed. End-stopped lines put a clear rhythmic break at the end of each line, often reinforced by a comma or period.