There are four kinds of sentences:

1) Declarative or Assertive sentence
2) Interrogative sentence
3) imperative sentence
4) Exclamatory sentence


1) Declarative or Assertive Sentence:-
A sentence that makes a statment or assertion, is called
declarative or Assertive sentence.
Examples,
1) The bird sat on a trree.
2) A horse is running.
3) Ahmed is reading.

2) Interrogative Sentence:-
A sentence that asks a question, is called interrogative sentence.
Examples,
1) Do you go to school ?
2) What is your name ?
3) Where do you live ?

3) Imparative and optative sentence:-
A sentence that expresses a command or an entreaty, is called
imperative sentence.
Examples,
1) Go to here, you fool. 5) Kindly go there.
2) Do it now. 6) Excuseme please.
3) Do not do it now. 7) O Allah, guide me to the right path.
4) Shut the door. 8) May he live long.

4) Exclamatory Sentence:-
A sentence that expresses strong feeling, is called an Exclamatory sentence.
Examples,
1) How fine a climate it is !
2) What a man he is !