Prepositions of Location: in, at, and on
and No Preposition

IN
(the) bed*
the bedroom
the car
(the) class*
the library*
school*
AT
class*
home
the library*
the office
school*
work
ON
the bed*
the ceiling
the floor
the horse
the plane
the train
NO PREPOSITION
downstairs
downtown
inside
outside
upstairs
uptown

* You may sometimes use different prepositions for these locations.

Prepositions of Movement: to and No Preposition

We use to in order to express movement toward a place.
They were driving to work together.
She's going to the dentist's office this morning.

Toward and towards are also helpful prepositions to express movement. These are simply variant spellings of the same word; use whichever sounds better to you.
We're moving toward the light.
This is a big step towards the project's completion.

With the words home, downtown, uptown, inside, outside, downstairs, upstairs, we use no preposition.
Grandma went upstairs
Grandpa went home.
They both went outside.

Prepositions of Time: for and since

We use for when we measure time (seconds, minutes, hours, days, months, years).
He held his breath for seven minutes.
She's lived there for seven years.
The British and Irish have been quarreling for seven centuries.

We use since with a specific date or time.
He's worked here since 1970.
She's been sitting in the waiting room since two-thirty.

Prepositions with Nouns, Adjectives, and Verbs.

Prepositions are sometimes so firmly wedded to other words that they have practically become one word. (In fact, in other languages, such as German, they would have become one word.) This occurs in three categories: nouns, adjectives, and verbs.

NOUNS and PREPOSITIONS

approval of
awareness of
belief in
concern for
confusion about
desire for

fondness for
grasp of
hatred of
hope for
interest in
love of

need for
participation in
reason for
respect for
success in
understanding of

ADJECTIVES and PREPOSITIONS

afraid of
angry at
aware of
capable of
careless about
familiar with

fond of
happy about
interested in
jealous of
made of
married to

proud of
similar to
sorry for
sure of
tired of
worried about

VERBS and PREPOSITIONS

apologize for
ask about
ask for
belong to
bring up
care for
find out

give up
grow up
look for
look forward to
look up
make up
pay for

prepare for
study for
talk about
think about
trust in
work for
worry about

A combination of verb and preposition is called a phrasal verb. The word that is joined to the verb is then called a particle. Please refer to the brief section we have prepared on phrasal verbsfor an explanation.

Idiomatic Expressions with Prepositions

  • agree to a proposal, with a person, on a price, in principle
  • argue about a matter, with a person, for or against a proposition
  • compare to to show likenesses, with to show differences (sometimes similarities)
  • correspond to a thing, with a person
  • differ from an unlike thing, with a person
  • live at an address, in a house or city, on a street, with other people

Unnecessary Prepositions

In everyday speech, we fall into some bad habits, using prepositions where they are not necessary. It would be a good idea to eliminate these words altogether, but we must be especially careful not to use them in formal, academic prose.

  • She met up with the new coach in the hallway.
  • The book fell off of the desk.
  • He threw the book out of the window.
  • She wouldn't let the cat inside of the house. [or use "in"]
  • Where did they go to?
  • Put the lamp in back of the couch. [use "behind" instead]
  • Where is your college at?