Principles of classification: there are two principles used for the classification of sentences.
1. The first principle is according to TYPES OF COMMUNICATION. Applying that principle we obtain a classification into declarative, interrogative, imperative, and exclamatory sentences.
1.1.Declarative sentences assert or deny something, E.g.: A wind had cleared the mist, the autumn leaves were rustling and the stars were shining.
1.2. Interrogative sentences ask a question: Do you like this?