This document provides information about compound-complex sentences, which contain two independent clauses and one dependent clause. It explains that constructing these sentences requires knowledge of previous grammatical rules. Several examples of compound-complex sentences are given, showing that the dependent clause can come first or the independent clauses can come first, and the clauses can be connected with commas, semicolons, or coordinating conjunctions. The key is applying existing rules to link the first two clauses and then the second two clauses.