四行诗

四行诗（英文：Quatrain，又称四行連、四行連句）是一种欧洲常见的诗节体裁，每一首诗有4行。押韵构成是aabb、abab、abba、abcb。

基本形式
aabb
: Tyger! Tyger! burning bright
: In the forests of the night,
: What immortal hand or eye
: Could frame thy fearful symmetry?
abab
: "The wind doth blow today, my love
: And a few small drops of rain;
: I never had but one true-love
: In cold grave she was lain.
abba
: Strong Son of God, immortal Love,
: Whom we, that have not seen thy face,
: By faith, and faith alone, embrace,
: Believing where we cannot prove;
abcb
: There lived a wife at Usher's Well,
: And a wealthy wife was she;
: She had three stout and stalwart sons,
: And sent them over the sea.
aaba
: Awake! for Morning in the Bowl of Night,
: Has flung the Stone that puts the stars to flight:
: And Lo! the Hunter of the East has caught
: The Sultan's Turret in a Noose of light.