This document provides explanations and examples of the use of location prepositions and adverbs in English. It defines "on", "above", "under", and "below" when describing direct or indirect contact with an object. It explains how "at" can indicate being inside or outside of a building. "In" emphasizes being inside the space of something, while "on" indicates contact on the surface of an object. It also provides context for the use of "on" with flat or linear nouns and examples of sentences using these terms.