Prepositions are words that tell (specify) location, both in time and place. Specifically, these words can describe something at one place, an object’s location in relation to other objects (above and below, being closer or farther). Prepositions also describe an object in time, at both one time and over an extended amount of time.
My pen is on the pie.
My iPod is in the soup.
My homework is under the dog.
I have class at 7:00.
I didn’t find my phone until midnight.
I haven’t seen my wallet since last weekend.
What’s an "Object of a Preposition"?
An object of a preposition is a noun, pronoun, or gerund noun that pairs up with a preposition. The examples already looked at all have object of prepositions. Have you ever wondered what a prepositional phrase is? A prepositional phrase is formed by adding a preposition and an object of preposition.
The toothpaste is near the sink.
I keep in shape by running.
My computer charger is plugged into the wall.
(Here into is the preposition; the wall is the object of preposition. Together they form a prepositional phrase.)
Unneeded Additional Prepositions
Often people add prepositions when they do not need to
Meet up with SHOULD BE meet / Where are they at? SHOULD BE where are they?
Dates and Times
Use “in” or “for” with general measurements and “on” or “at” for specific dates.
Mitch was at school in the morning. / The essay is due at 11:00 PM on the 8th.
Chart of Prepositions