English Prepositions

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The author of -
Communication Skills in English For Engineers and Technologists

Here is a comprehensive, structured, and student-friendly guide on prepositions. I have organised it from basic concepts (for lower classes) to more advanced usage (for higher classes), using the same easy-to-read format.

Prepositions

Mastering English Prepositions: The Ultimate Guide for Students

Prepositions are small words that often cause big confusion. They are the "bridge" words in a sentence—they connect a noun or pronoun to another part of the sentence to show Time, Place, or Direction.

Think of a preposition as a GPS for your sentence. It tells you where something is, when something happened, or where it is going.

Here is your complete guide to mastering them.

Part 1: The "Big Three" – IN, ON, AT

The most common prepositions are In, On, and At. To memorise them, visualise a triangle.

  • In (General/Big): The top, widest part of the triangle.

  • On (More Specific): The middle part.

  • At (Very Specific): The bottom, sharp point.

1. Prepositions of TIME 🕒

PrepositionUsageExamples
IN
(Long Periods)		Months, Years, Seasons, Centuries, Parts of the DayIn April
In 2024
In the morning
In the 21st century
ON
(Days & Dates)		Specific Days, Specific DatesOn Monday
On my birthday
On July 4th
On Christmas Day
AT
(Precise Time)		Clock time, Exact momentsAt 5:00 PM
At midnight
At lunchtime
At the moment

Exception: We say "In the morning/afternoon/evening," but we say "At night."

2. Prepositions of PLACE 

PrepositionUsageExamples
IN
(Enclosed/Large)		Countries, Cities, Rooms, Enclosed spacesIn India
In London
In the kitchen
In a box
ON
(Surfaces)		Surfaces, Floors, Streets, Public TransportOn the table
On the wall
On the bus
On the 2nd floor
AT
(Specific Point)		Specific locations, Addresses, and eventsAt the door
At the bus stop
At home
At 22 Baker Street

Part 2: Prepositions of MOVEMENT

These are used when something is moving from one place to another.

  1. To: Movement toward a specific destination.

    • "I am going to school."

  2. Into: Movement entering an enclosed space (Action).

    • "The cat jumped into the box."

  3. Onto: Movement to a top surface.

    • "He climbed onto the roof."

  4. Through: Movement from one side of an enclosed space to the other.

    • "The train went through the tunnel."

  5. Across: Movement from one side of a surface to the other.

    • "She swam across the river."

  6. Towards: Movement in the direction of something (but not necessarily reaching it).

    • "He walked towards the door."

Part 3: Confusing Pairs (Don't Mix These Up!)

1. Between vs. Among

  • Between: Used for two distinct items or people.

    • "The secret is between you and me."

  • Among: Used for more than two or a group.

    • "She is popular among her friends."

2. Since vs. For (Time)

  • Since: From a starting point in the past.

    • "I have lived here since 2010."

  • For: Measuring a duration of time.

    • "I have lived here for 10 years."

3. Beside vs. Besides

  • Beside: Next to.

    • "Sit beside me."

  • Besides: In addition to / Apart from.

    • "Besides English, she speaks French."

4. By vs. With

  • By: Who did the action (the agent).

    • "The book was written by J.K. Rowling."

  • With: The tool used to do the action.

    • "I cut the apple with a knife."

Part 4: Advanced – Fixed Prepositions

For higher-level students, the challenge isn't logic—it's memory. Certain adjectives and verbs always take specific prepositions. There are no rules for these; you just have to memorise them!

  • Afraid OF ("She is afraid of spiders.")

  • Good AT ("He is good at math.")

  • Interested IN ("I am interested in art.")

  • Married TO ("He is married to a doctor.") Note: Not 'married with'!

  • Depend ON ("It depends on the weather.")

  • Listen TO ("Please listen to me.")

  • Waiting FOR ("I am waiting for the bus.")

Common Mistakes to Avoid 

Wrong Right Reason
Discuss about politicsDiscuss politics"Discuss" means "talk about, so you don't need 'about'.
Married with himMarried to himYou get married to a person.
Enter into the roomEnter the room"Enter" implies going in. (Use "enter into" only for agreements/contracts.
Good in EnglishGood at EnglishWe use "at" for skills and abilities.
I prefer tea than coffeeI prefer tea to coffeeWith "prefer", we always use "to".

Summary Cheat Sheet

  • Time: At (Clock), On (Day), In (Year/Month).

  • Place: At (point), on (surface), in (inside).

  • Group: Between (2 people), Among (3+ people).

  • Tools: Write with a pen (tool), written by John (person).

Mastering prepositions takes practice, but once you understand the logic of "In, On, At" and memorise the fixed pairs, your English will sound natural and professional!

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