This document discusses different types of sentences: simple, compound, complex, and compound-complex. It provides examples of each type and explains their key characteristics. A simple sentence contains one independent clause. A compound sentence contains two independent clauses joined by a conjunction. A complex sentence contains an independent clause joined by one or more dependent clauses. A compound-complex sentence contains at least two independent clauses and at least one dependent clause. Being able to identify and write different sentence types helps improve writing variety and quality.