C. Types of Sentence by Purpose

Sentences can also be classified based on their purpose :

1. Declarative / Statement Sentence or Declaration, the most common type, commonly makes a statement: “I am going home.”
2. Interrogative Sentence or Question s commonly used to request information — “when are you going to work?” — but sometimes not; “see” rhetorical question.
3. Exclamatory Sentence” or “Exclamation is generally a more emphatic form of statement expressing emotion: “what a wonderful day this is!
4.  Imperative Sentence” or “Command tells someone to do something: “go to work at 7:30 in the morning.”

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Reference by : https://englishahkam.blogspot.com/2011/08/sentence.html