Whether you climb up, hike down, swim around, or paddle out to that island offshore, you need prepositions to do it. Prepositions' primary function is to tell us where things are located and what direction the action is moving. Prepositions are so flexible, though, that when they are used in combination with certain verbs and in idiomatic expressions, their meanings can change dramatically. So read through this chapter carefully and check out what prepositions can do for you.