A. Location: We use prepositions to talk about where someone or something is: above, among, at behind, below, beneath, beside, between, by, in, in between, inside, near, next to, on, opposite, outside, over, round, through, under, underneath
A1. We use phrases with of as prepositions: at the back of; at the top of; at the bottom of; at the end of; on top of; at the front of; in front of; in the middle of
A2. We can use right as an intensifier with some of these prepositions.
B. Direction: We use adverbials to talk about the direction where someone or something is moving.
B1. also use prepositional phrases to talk about direction: across, along, back, back to, down into, onto, out of, past, through, to, towards
B2. also use adverbs and adverb phrases for place and direction: abroad, away, anywhere, downstairs, downwards, everywhere, here, indoors, inside, nowhere, outdoors, outside, somewhere, there, upstairs
B3. often have a preposition at the end of a clause.
C. Distance: We use adverbials to show how far things are.
C1. Sometimes we use a preposition at the end of a clause.