The document discusses natural and inverted sentence order. In natural order, the subject comes before the verb. In inverted order, the verb or part of the verb comes before the subject, as in questions. A sentence also has inverted order when an adverb, helping verb, or prepositional phrase begins the sentence and modifies the verb rather than the subject. The document provides examples of sentences in both natural and inverted order and asks the reader to identify which type several sentences are.