This document provides an outline and explanation of adverb clauses. It begins by defining adverb clauses and their functions of answering how, where, when, why, to what extent, or under what condition. It then covers the five main types of adverb clauses: time, contrast, reason/purpose, reduced time clauses, and reduced reason clauses. For each type, it provides rules, examples, and exercises. It emphasizes that adverb clauses function like adverbs to modify verbs, adjectives, or other adverbs. It also notes that adverb clauses can be reduced by changing the subject to a gerund and omitting conjunction words. The document is intended to help students understand and identify different kinds of adverb clauses