In grammar, a correlative is a word that is paired with another word with which it functions to perform a single function but from which it is separated in the sentence.
In English, examples of correlative pairs are bothâÂÂand, eitherâÂÂor, neitherâÂÂnor, theâÂÂthe ("<u>the</u> more <u>the</u> better"), soâÂÂthat ("it ate <u>so</u> much food <u>that</u> it burst"), and ifâÂÂthen.
In the Romance languages, the demonstrative pro-forms function as correlatives with the relative pro-forms, as autantâÂÂque in French; in English, demonstratives are not used in such constructions, which depend on the relative only: "I saw <u>what</u> you did", rather than *"I saw <u>that</u>, <u>what</u> you did".