Which words in the sentence are the adverb clause? Before we leave for the restaurant, may I read this e-mail? A. for the restaurant B. before we leave for the restaurant C. we leave for the D. may I read this e-mail

An adverb clause is a group of words that function as an adverb. The clause can modify verbs, adverbs and adjectives by telling when, where, why, how, how much and under what condition. They begin with a subordinating conjunction (such as after, if, because and although) and they contain a subject and a predicate.