Sentence can be defined as a group of one or more words. On the other hand, sentence structure is understood as the way basic grammatical elements (a subject, predicate, and sometimes direct or indirect objects) of a sentence are combined. The rules for how a sentence is constructed are simple. These include the necessity for a subject, predicate, and object (in that order) in every sentence. Beyond that, we can also add elements like prepositions and conjunctions. In English, for example, sentences can be classified as simple, complex and compound. That being said, check the answer that provides the correct information about the types of sentence structure in English.