An adverbial expression is one that repeats the first term or extends or clarifies it, in an incidental articulation. There are three varieties of the adverbial phrase "Her pooch, a bull mastiff, looks strange with a pink bow adhered to her head" includes a thing expression. "His preferred side interest, weaving, is fairly abnormal for a man" incorporates an "ing" wordexpress. "The Tahitian's desire, to turn into an ice skater, is startling" has an infinitive expression.
