There are four kinds of sentences according to structure. They are Simple sentence, Compound sentence, Complex Sentence and Compound Complex Sentence.
1. Simple Sentence:
It is a group of words which makes sense. It has a Subject and a predicate.
(eg) The birds fly in the sky.
Sub Predicate
The Sun rises in the east.
Sub Predicate
Clause:
The Clause is of two types
1. Main clause or Independent clause
2. Subordinate clause or dependent clause.
Main Clause:
A main clause can stand alone and give a complete meaning.
(eg) She wrote a letter.
He is a good boy.
Tom likes to draw pictures.
Ria sang a song.
Subordinate clause:
The subordinate clause cannot stand independently. It always depend on the main clause to give a complete meaning.
(eg) Though I am poor
As she was ill
Unless you work hard
I you study well
2. Compound Sentence:
A Compound Sentence is a sentence that contains two or more main clause.
(eg) The bell rang and the music began.
He ran out of money, so he had to stop playing cards.
She drank her morning coffee, and then she showered and dressed.
3. Complex Sentence:
A complex sentence is a sentence that contains one main clause and one or more subordinate clause.
(eg) Although he was wealthy he was unhappy.
When he was younger, he believed in fairy tales.
Unless you work hard, you will not pass.
4. The Compound-Complex Sentence:
The Compound-Complex Sentence is comprised of at least two main clauses and one or more subordinate clauses.
(eg) Annie doesn't like cartoons because they are loud, so she doesn't watch them.
The dog started barking so the cat ran away and I couldn’t keep up, so I stopped.
When we won the world cup, the team captain jumped for joy, and the fans
Cheered.