A simple sentence is classified on the basis of various principles, one of which is the presence of sentence members. On this basis, the sentences are complete and incomplete. On the one hand, the incomplete sentences are the product of the thrift tendency, which is one of the most important principles of language. Here it is important to express a larger idea in a few words. This, of course, is done by man's own inner needs. On the other hand, this is one of the characteristics of dialogic speech; that is, there is no need to re-use the answer as the topic is known in the question. Finally, the role of parallelism is undeniable; in the same structural constructions, less actual components are elliptical. Since the detective works are directly related to real and dynamic life, here the elements of everyday style attracts more attention among which incomplete sentences occupy an important place. There are different and rich structural types of incomplete sentences here. First of all, a series of incomplete sentences is more characteristic. In this case, both the question and the answer sentences may be incomplete. Second, in question-answer speech, incomplete sentences are followed by elliptical sentences and one replaces the other. Third, in some cases, the grammatical structure of the incomplete sentence that is the answer may not match the grammatical structure of the question sentence. Finally, in the language of detective sentences, in addition to the incomplete sentences formed with the participation of every sentence members, there are also incomplete sentences in which several members are omitted and formed with the participation of several other members.