An adverbial clause performs the function of an adverbial modifier. It can modify a verb, an adjective or an adverb in the principal clause. He stopped as Kravat came rushing out. (Heym) He was getting on better than he’d expected. (Lindsay) Frank... returned to the auction room as fast as his legs would carry him.(Dreiser) Adverbial clauses are joined to the principal clause by means of subordinating conjunctions; they are not joined to the principal clause asyndetically except sometimes adverbial clauses of condition. An adverbial clause may follow or precede the clause to which it is subordinated. In the first [...]