The Chaucer Review: An Indexed Bibliography (Vols. 1-30)

Donner, Morton. "The Gawain-Poet's Adverbs." 26 (1991): 65-82.
The alliterative tradition uses more flat adverbs than adjectives and requires them to carry more weight. Adverbs are particularly useful in alliterative verse because they can modify intransitive verbs and non-alliterative subjects or objects. Adverbs also work to "keep the sound of [the] words in harmony with their syntax" (68). The Pearl-Poet also uses dual-form adverbs, inflected adverbs, and adverb pairs in a variety of patterns throughout Sir Gawain and the Green Knight, Patience, and Purity.