This document defines adverbs and adverbial clauses. It discusses how adverbs modify verbs, adjectives, and other adverbs. Common adverbs often end in "-ly" but this is not always the case. The document also describes different types of adverbs including manner, place, frequency, time, purpose, comment, degree. It discusses the flexible positions of adverbs in sentences and provides examples. Finally, it includes exercises testing the understanding of adverb positions and ordering.