1. Conjunctions
Correlative

2. Correlative Conjunctions
These conjunctions work in pairs to join words and groups of words of equal weight in a sentence:
Both… And
Either… Or
Just As… So
Neither… Nor
Not Only… But (Also)
Whether… Or

3. Purpose of Correlative Conjunctions
These conjunctions are used to provide more clarity than can be given with a Coordinating conjunction
Examples:
Both you and I should go to school.
Either Jeff or Megan did the deed.
Neither Beth nor Carlos did their homework
I wrote not only my essay but also his.