A sentence is a group of words that expresses a complete idea, consisting of a subject and a verb, starting with a capital letter and ending with appropriate punctuation. There are four types of sentences: declarative, interrogative, imperative, and exclamatory, each serving different functions in communication. Examples are provided for each type to illustrate their respective characteristics.

1. Sentence
A group of words which expresses a
complete idea or thought is called a
sentence.
Example
He bought a car.
The above group of word expresses a
complete idea. Such combination of words is
called a sentence.

2. A sentence is a combination of words including a
subject and a verb which express a complete idea. A
sentence begins with a capital letter and ends with a
period, question mark or exclamation mark.
Examples
He goes to school.
She is eating an apple.
My name is John.
What are you doing?
Who are you?
What a beautiful flower!

3. Kinds of sentences
There are four kinds of sentences.
Assertive or Declarative Sentence
A sentence that makes a statement or assertion is
called an assertive or declarative sentence. Assertive
sentence ends with a period.
Examples
He goes to school
He likes to play chess.
They are singing a song.

4. Interrogative Sentence
A sentence that asks a question is called
an interrogative sentence. Interrogative
sentence ends with question mark.
Examples.
Where are you going?
Do you use your laptop?
Imperative Sentence
A sentence that expresses a request,
command or advice is called an imperative
sentence.
Examples
Open the door. (an order)
Please help me. (a request)

5. Exclamatory Sentence
A sentence that expresses strong feelings or
emotions is called an exclamatory sentence.
These sentences express surprise, joy, sorrow,
appreciation, love excitement, frustration, anger
etc. An exclamatory sentence ends with
exclamation mark.
Examples
What a beautiful flower it is!
How nicely she is singing!
That is fantastic!
Hurrah! We won the match!