This document provides instruction on the four main types of sentences in English: simple, compound, complex, and compound-complex. It defines each type and provides examples. Simple sentences contain one independent clause. Compound sentences join two independent clauses with coordinating conjunctions or semicolons. Complex sentences contain an independent clause and one or more dependent clauses. Compound-complex sentences contain at least two independent clauses and one or more dependent clauses. The document reviews identifying and writing each sentence type and provides guidance for a homework assignment to write examples of each.