A word or group of words that combines along a noun or pronoun to complete a phrase that acts like a adjective, verb, adverb or noun,
Prepositions are used to either indicate a relationship of a noun or phrase to something else.When using a preposition, you must always have the subject and verb before it, and follow it with a noun
Accusative
Ad- To, toward, near to
Ante- Before
Apud- Next to
Circum- Around
Contra- Against
Extra- Outside
Inter-among, between
Ob- in the way of
Per- through
Post- Behind, After
Propter- On the account of
Super- Above
Trans- Across
Ablative
A/Ab- Away from
Cum- with, When
De- About
Ex/E- from/ out of
Pro-before
Sine- without
Sub-under
The preposition has IN its own category because it has two different meanings. It also can fit into two different cases
Accusative- In the accusative it could be translated as into or onto
Ablative- In ablative translated as simply in
Ego cum puellam curret- I am with the girl running
Vir ex villa venit- A man comes out of the house
sub aqua- under the water