In the dictionary a preposition is defined as, 'an
indeclinable word serving to mark a relation between the
noun or pronoun it governs and another word'. Its
etymology defines it as arising from the Latin 'prae'
meaning 'before' and 'posito' meaning 'a putting or
placing'. Therefore the preposition stands before the
noun to tell you its position in time and space.
The following table of common prepositions may be
found to be useful;
|
off
|
of
|
in
|
between
|
|
within
|
outside
|
inside
|
until
|
|
during
|
after
|
past
|
through
|
|
down
|
up
|
without
|
between
|
|
across
|
around
|
by
|
from
|
|
about
|
along
|
below
|
with
|
|
behind
|
among
|
under
|
over
|
|
before
|
above
|
at
|
upon
|
|
to
|
onto
|
on
|
into
|
If any of these words stand before or refer to the
noun they are always prepositions. They may often be seen
referring to the verb and in such cases are classified as
adverbs.
The dog walked BY. ...... BY is, in this case, an
adverb
The dog walked BY the river. BY is here referring
to the river, a noun, and, as such, is a
preposition.