Final answer:
The sentence in question does include an adverb clause, which begins with 'although' and provides contrasting context to the main clause. The adverb clause cannot stand alone and modifies the main clause by describing circumstances or conditions.
Step-by-step explanation:
The sentence "Although her personality had not changed at all, Marcia looked quite different" contains an adverb clause. Answer: True. An adverb clause is a group of words that functions as an adverb and modifies a verb, an adjective, or another adverb. This type of clause always begins with a subordinating conjunction, such as "although," "because," or "when," and includes a subject and a verb. In the given sentence, "Although her personality had not changed at all" is the adverb clause; it provides additional information about the main clause "Marcia looked quite different" by expressing a contrast.
The main clause expresses the main idea of the sentence. In comparison, the subordinate, or dependent, clause cannot stand alone as its own sentence. It is essential to recognize that the subordinating conjunction "although" indicates the start of the adverb clause, setting the stage for a contrast with the main clause.
Understanding the role of adverb clauses in a sentence is critical for grasping the complexity and nuances of written English. These clauses enhance the richness of expression and depth in our language by providing additional context and connecting ideas.