Sentence structure refers to the way words are arranged within a sentence to convey a complete thought clearly and effectively. It involves the correct use of subjects, verbs, and objects, along with clauses and phrases that add meaning and detail. A well-structured sentence ensures that ideas flow logically and are easy to understand. There are four main types of sentence structures: simple, compound, complex, and compound-complex. Each type varies in how it connects ideas using conjunctions and punctuation. Mastering sentence structure helps improve writing, making communication clearer, more engaging, and grammatically correct.