The Sentence in English Grammar

What is Sentence

1. When we speak or write we use words. We generally use these words in groups; as, Little Jack sat in a corner.

A group of words like this, which makes complete sense, is called a Sentence.

Kinds of Sentences:
Sentences are of four kinds:
(1) Those which make statements or assertion; as,
The cat is on a wall

(2) Those which ask questions; as
Where do you live

(3) Those which express commands, requests, or entreaties; as,
Be quit 
Have mercy upon us

(4) Those which express strong feelings; as
How cold the night is!
What a shame!

A sentence that makes a statement or assertion is called a Declarative or Assertive sentence.
A sentence that asks a question is called an Interrogative sentence.
A sentence that expresses a command or an entreaty is called an Imperative Sentence. 
A sentence that expresses strong feeling is called an Exclamatory sentence.

English Grammar