A correlative conjunction is two conjunctions used in pairs.
Both Jeb and Mary will need to retake the test.
I will eat my hat if either Mary wins the race or Jeb finishes the race.
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Greek:
και… και… = both/and
μητε… μητε… = neither/nor
ουτε… ουτε… = neither/nor
ἢ… ἢ… = either/or