Hello. I have an exam on monday and I'm not sure if I understand this. I have a difficulty differing adverbial phrase and prepositional phrase, to my slovenian eyes they seem very much alike. :/ "Do you see that building on the right?" "That building on the right" is a noun phrase with "building" functioning as a headword and "that" as a determiner, right? And I understand "on the right" functions as a postmodifier, but I'm not sure whether "on the right" is prepositional phrase or adverbial phrase. Can someone help me to understand this? And please don't answer me just with definitions, but with simple explanation on how to differ these two phrases (if there is such an explanation), please... I appreciate your help.