A paired conjunction (such as not only . . . but also) that links balanced words, phrases, and clauses.
The elements connected by correlative conjunctions are usually parallel--that is, similar in length and grammatical form. Each element is called a conjoin.
These are the primary correlative conjunctions in English:
both . . . and
either . . . or
neither . . . nor
not . . . but
not only . . . but also
Other pairs that sometimes have a coordinating function include the following:
as . . . as
just as . . . so
the more . . . the less
the more . . . the more
no sooner . . . than
so . . . as
whether . . . or
- Comparative Correlative
- Coordinating Words, Phrases, and Clauses
- Dirimens Copulatio
- Paired Construction
- Parallel Structure
- Practice in Identifying Coordinating and Correlative Conjunctions
- Sentence Building With Coordinators
Etymology:From the Latin, "to report, carry back"
Examples and Observations:
- "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety."
- "To accomplish great things, we must not only act, but also dream; not only plan, but also believe."
- "The loss we felt was not the loss of ham but the loss of pig. He had evidently become precious to me, not that he represented a distant nourishment in a hungry time, but that he had suffered in a suffering world."
(E.B. White, "Death of a Pig," 1948)
- "The man of knowledge must be able not only to love his enemies but also to hate his friends."
(Friedrich Nietzsche, Ecce Homo)
- "Education is not the filling of a pail but the lighting of a fire."
(William Butler Yeats)
- "The fascination of shooting as a sport depends almost wholly on whether you are at the right or wrong end of the gun."
(P. G. Wodehouse)
- "I couldn't distinguish whether I was smelling the clutching sound of misery or hearing the cloying odor of death."
(Maya Angelou, I Know Why the Caged Bird Sings, 1970)
- "Neither the life of an individual nor the history of a society can be understood without understanding both."
(C. Wright Mills)
- "In nature there are neither rewards nor punishments; there are only consequences."
(Robert G. Ingersoll)
- "In the end, we will remember not the words of our enemies but the silence of our friends."
(Martin Luther King, Jr.)
- "It is difficult to produce a television documentary that is both incisive and probing when every twelve minutes one is interrupted by twelve dancing rabbits singing about toilet paper."
- Restrictions on Multiple Correlatives
- "A rule of traditional grammar limits the use of correlative conjunctions to two elements. Sentences using three or more correlative conjunctions are widely viewed as erroneous in their construction. Thus sentences like the following are widely viewed as mistakes: Both her mother, her father, and her sister are great public speakers. The team has neither the talent, discipline, nor stamina to win the championship."
(The American Heritage Guide to Contemporary Usage and Style. Houghton Mifflin, 2005)
- "According to didactic tradition, the use of correlative coordinators is unacceptable when there are three or more conjoins:
?We are both willing, able, and ready to carry out the survey. [1}". . . Although commonly stigmatized, multiple correlatives such as [1-3] can add clarity to constructions whose complexity might otherwise cause confusion. For this reason, such constructions are sometimes used even in careful written English, eg in the rubric of an examination paper:
?Either the Minister, or the Under-secretary, or the Permanent Secretary will attend the meeting. 
?Tompkins has neither the personality, the energy, nor the experience to win this election. 
Candidates are required to answer EITHER Question 1 OR Question 2 OR Questions 3 and 4."(Randolph Quirk, Sidney Greenbaum, Geoffrey Leech, and Jan Svartvik, A Grammar of Contemporary English. Longman, 1985)