orrelative conjunctions are pairs of conjunctions that link words, phrases or clauses. They must always connect two elements that are grammatically similar, meaning that the same structure applies. In other words, nouns are linked to nouns, adjectives to adjectives, prepositional phrases to prepositional phrases; regardless of the part of speech or the type of phrase or clause, they must stay grammatical equals. Below are some common correlative conjunctions, or pairs: