... / on the mirrorSome one in / on the islandSomething in / on the treeSome one in / on (the) bed2.8. THE SPATIAL PREPOSITIONS AT, ON, IN” AT, ON, IN” are the basic and most general SPATIAL ... thesis, we concentrate ONLY on the spatial and temporal usage of the prepositions AT, ON, IN.2.8.1. Usage of AT Pattern 1: at + the + place within a city or town• The women are at the supermarket.Nouns ... development / concentrate on the lesson …(e) Manner/means: diet on bananas, go on foot(f) Circumstances: on arrival, on my return, on the condition that …(g) Cause/ reason: congratulate some one on his...