Prepositions show the relationship between one thing and another in a sentence. They link nouns, pronouns, and phrases to other words. The word or phrase introduced by the preposition is called the object. There are general rules for using prepositions - they can end a sentence, follow a noun but not a verb, and a prepositional phrase always begins with a preposition and ends with a noun or pronoun. Prepositions are important as they connect parts of sentences and indicate spatial, physical, and temporal relationships.

1. USE AND IMPORTANCE

2.  A preposition is a word which shows the
relationship between one thing and another.
 It links nouns, pronouns and phrases to other
words in the sentence.
 The word or phrase that the preposition
introduces is called the object of the
sentence.

3. before behind from beneath
across below down throughout
past near above during
to outside beyond down
among In Inside Into
during except For from
like near of off on
since toward upon over
after through With under

4. Here are some general rules regarding prepositions:
 It is permissible to end a sentence with a
preposition.
 A preposition is followed by a noun.
 A preposition is never followed by a verb.
 It is permissible to begin a sentence with a
preposition, or a prepositional phrase, but be very
careful when you do so.
 A prepositional phrase always begins with a
preposition and ends with a noun or pronoun
called the OBJECT of the preposition.
 The subject of the sentence can never be part of a
prepositional phrase.
 A verb can never be a part of a prepositional
phrase.

5.  Prepositions are words in English used
to express the relationship of the
prepositional word to other words in a
sentence.
 Like, nouns, pronouns, verbs and
adjectives prepositions are an important
part of English speaking and writing,
especially in sentence structure.
 The proper use of prepositions is critical
for any writer, whether they are looking
to produce work in an academic setting,
whether they are trying to write clearly in
a place of business, or they are trying to
boost their creative writing skills.

6.  Here is an example with the preposition up.
Correct usage: We ran up the hill.
Incorrect: Up the hill we ran.
Here is an example with the preposition over.
 Correct: The rabbit jumped over the log.
incorrect: Over the log the rabbit jumped.
 Here is an example with the preposition aboard.
Correct: We got aboard the train to ride down to San
Diego.
Incorrect: Aboard the train we got to ride down to San
Diego.

7.  Without fear, the brave child climbed the tall
mountain.
 Under the four poster bed, the lazy cat was
having a snooze.
 Inside the old house there were all sorts of
strange looking people.
 Along the hall crawled the large, spindly
spider.

8.  Prepositions are important because they work to
connect various parts of a sentence.
 Prepositions tell us where something is in
relation to something else or how things are
related in space –in, on, to, with, over, under,
onto, into, beside or where so/sth is going (to
church).
 Others show physical connections or possession
between nouns or pronouns and another word
such as of, with, by.
 Some refer to relationships in time: while, during,
after, until, before, since.