2008-06-06 » Adverb clauses act in the same way that adverbs function. They describe verbs, adverbs, or adjectives. They answer the questions how?, where?, when?, why?, and to what extent?
Go to the following sites to learn more about adverb clauses.
http://www.learn4good.com/languages/evrd_grammar/adverb_clauses_ex.htm