(2) An interrogative sentence asks a question.
(3) An imperative sentence expresses a command or a request.
(4) An exclamatory sentence expresses surprise, grief, or some other emotion in the form of an exclamation or cry.
A declarative, an interrogative, or an imperative sentence may also be exclamatory.
Subject and Predicate
5. Every sentence consists of a subject and a predicate.
The subject of a sentence designates the person, place, or thing that is spoken of; the predicate is that which is said of the subject.
6. The simple subject of a sentence is a noun or pronoun.
The simple predicate of a sentence is a verb or verb-phrase.
7. The simple subject, with such words as explain or complete its meaning, forms the complete subject.