Prepositions Prepositions are connecting words. A preposition and its object make a prepositional phrase. Prepositional phrases must have an object. The student fell down. Conjunctions Conjunctions connect two words or phrases or two clauses of equal rank.
Conjunctions are similar to prepositions in that they link words within a sentence.
Coordinate conjunctions Coordinate conjunctions join words or phrases or clauses of equal rank . There are simple conjunctions and correlative conjunctions. Simple conjunctions may indicate addition or enumeration, contrast, choice or inference . Additive Joe and Jenny will come. He sent flowers to Jenny and to her mother.