Correlative conjunctions come in the form of pairs of words: either ... or; neither ... nor; both ... and; not only ... but also, and whether ... or.

EXAMPLE:
You can have either this one or that one.
They are neither our friend nor our ally.
Pepe can both juggle and perform magic tricks.
He has not only been reprimanded but also faces possible expulsion.
I couldn't decide whether to marry her or her sister.