双行押韵体 英语怎么说?

如果问的是双行押韵体，单单couplet就行了。不过哈姆雷特里的戏中戏的确用的是heroic couplet:

heroic couplet专指五音步抑扬格的双行押韵体，并且押的是阳性韵(即单音节韵)。

是heroic couplet

A heroic couplet is a traditional form for English poetry, commonly used for epic and narrative poetry; it refers to poems constructed from a sequence rhyming pairs of iambic pentameter lines. The rhyme is always masculine. Use of the heroic couplet was first pioneered by Chaucer in the Canterbury Tales. Chaucer is also widely credited with first extensive use of iambic pentameter.

A frequently-cited example illustrating the use of heroic couplets is this passage from Cooper's Hill by John Denham, part of his description of the Thames:

O could I flow like thee, and make thy stream

My great example, as it is my theme!

Though deep, yet clear, though gentle, yet not dull,

Strong without rage, without o'erflowing full.
The term "heroic couplet" is sometimes reserved