A compound-complex sentence is a type of sentence that combines elements of both compound and complex sentences. It contains at least two independent clauses and at least one dependent clause. For example, in the sentence "Although it was raining, we went for a walk, and we enjoyed the fresh air," the dependent clause is "Although it was raining," while the independent clauses are "we went for a walk" and "we enjoyed the fresh air." This structure allows for more detailed and nuanced expression in writing. By using a compound-complex sentence, writers can convey multiple ideas and relationships between them, enhancing clarity and depth. Understanding this sentence type can improve overall writing skills and comprehension of complex ideas.