content, and purpose. CLASSIFICATION ON THE BASIS OF SENTENCE STRUCTURE On the basis of structure, sentences can be classified into three categories; 1. Simple sentences It is a construction, which consists of just a single main clause. Example; We like pizza. 2. Compound sentences It consists of more than one main clauses and these main clauses are usually connected to each other by a conjunction coordinator (and, but, or, for, nor, so, or yet) or a comma or a