What is the difference between coordinating conjunction, subordinating conjunction and correlative conjunction ?
A conjunction that joins two independent clauses is called a coordinating conjunction. The two clauses that are joined by the conjunction are of equal rank and do not depend upon each other. For example:
Days are hot and nights are cool.
She is poor but she is sweet.
A conjunction that joins two clauses one of which is dependent upon the another is known as subordinating conjunction. For example:
He flunked because he did not study.
I will come if you want me to.
Conjunctions that are used in pairs are called correlative conjunctions. For example:
Either my sister or I will buy a gift for my mom.
Not only did I wrote a letter to you, but also I called you up.
(In the sentences above, either-or and not only-but also are correlative conjunctions.)