PREPOSITIONS IN, ON AND AT

Summary of Differences

Location: Refers to being inside a three-dimensional space.
- Example: "The cat is in the box."
Enclosed Spaces: Indicates being within boundaries.
- Example: "She lives in Singapore."
Time: Used for months, years, centuries, and long periods.
- Months: Used for months of the year.
  - Example: "He was born in August."
- Years: Used for years.
  - Example: "The company was founded in 1999."
- Seasons: Used for seasons.
  - Example: "We love to travel in the summer."
- Long Periods: Used for longer time frames, such as decades or centuries.
  - Example: "In the 21st century, technology has advanced rapidly."

Groups or Categories: Used to indicate membership.
- Example: "They are in the team."

Surface: Refers to being in contact with a surface.
- Example: "The grammar book is on the table."
Media: Indicates the medium of communication or presentation.
- Example: "I saw it on TV/ YouTube."
Days and Dates: Used for specific days and dates.
- Days: Used for specific days of the week.
  - Example: "We have a meeting on Wednesday."
- Dates: Used for specific dates.
  - Example: "Her birthday is on April 13th."
- Special Days: Used for holidays and special occasions.
  - Example: "We celebrate Christmas on December 25th."

Social Media: Often used to indicate presence on platforms.
- Example: "I have just posted a photo on Instagram."

Specific Locations: Refers to a point or specific location.
- Example: "He is at the bus stop."
Events: Indicates attendance or participation in events.
- Example: "He is at a concert."
- Time: Used for precise times.
  - Example: "The meeting starts at 4 PM."
- Holidays and Events: Used for specific events or holidays.
  - Example: "I’ll see you at New Year’s Eve."
- Periods of Time: Used for parts of the day when specifying a time frame.
  - Example: "We usually have breakfast at 8 AM."