There are four kinds of sentences:
1. Declarative Sentence (a statement)
2. Imperative Sentence (a command)
3. Interrogative Sentence (a question)
4. Exclamatory Sentence (an exclamation)
1. A declarative sentence is a sentence that states a fact. Such sentences are simple statements. They state, assert or declare something.
Examples:
Jan is a student.
She lives in a big city.
The capital of Denmark is Copenhagen.
Bacon and eggs make a great breakfast.
2. An imperative sentence gives a command, makes a request, or express a wish.
Examples:
Go to your room. (an order)
Please lend me your pen. (a request)
Have a nice day today. (a wish)
Go feed the cat.
3. An exclamatory sentence expresses sudden and strong feelings, such as surprise, wonder, pity, sympathy, happiness or gratitude.
Examples:
Oh What a shame!
My pie is ruined!
I can't believe it!
4. An interrogative sentence asks a question.
What is your name?
Where do you live?
Who's that, baby?