A statement sentence asserts or declares a fact, opinion or idea. It is also called an assertive sentence or a declarative sentence and is the most common type of sentence.
A sentence can be one of four kinds: statement, interrogative, imperative and exclamatory. Statement sentences are the most common type and the most important. Many stories, essays and papers are written containing only statement sentences.
Statement sentences almost always end in a period. There are rare occasions where a statement sentence ends in an exclamation point. Statement sentences never ask a question, give a command or make a request. They require no response.
Statement sentences are formed using a simple or compound subject and a predicate. "Sally walked the dog," is an example of a statement sentence. Another example is, "Jim and John played football while Jay watched."