Prepositions which take the Accusative
ad	towards, to; according to
adversus	toward, against
ante	before, in front of
apud	at, near, around, among, with; at house of, in works of
circa, circum, circiter	around, near
cis, citra	on this side of, short of
clam	unbeknown (unbeknownst)
contra	against, opposite
erga	towards (*beware: not "ergo" = therefore)
extra	outside of
infra	below (e.g. infrared)
inter	between, among
intra	within
juxta	beside, next to, according to (*later meaning)
ob	in front of, because of (e.g. obvious - ob via = in your path)
penes	in the possesion of
per	through, over, by, with help of (*beware: not italian)
post	behind, after
praeter	beyond, outside of
prope	near
propter	because of (near)
secundum	according to (*beware secundus -a -um = second)
supra	beyond
trans	over, beyond
ultra	beyond
usque	up to, continually
versus	toward
Prepositions which take both the Accusative and Ablative
in	into (acc.), in (abl.)
sub	under
subter	beneath, below
super	over, above
Prepositions which take the Ablative
a, ab, abs	from (seperation), by (personal agent)
absque	without
coram	in front of, around, in the presence of
cum	with (accompaniment, not instrument)
de	from; about, of, concerning
e, ex	out of, from (the center)
prae	in front of
pro	before, in front of; for; according to; as, like
sine	without
* a or ab can mean by "a person" (or animal); to say by "a thing" use the ablative alone without the preposition
* cum means with as accompaniment = together (with "my friend"); to say I eat with "a fork" (instrument) use the ablative alone without the preposition