Prepositions are used to locate something in time and space, modify a noun; or tell when or where or under what conditions something happened. The following are guidelines for using prepositions correctly. This covers many common situations.
Prepositions of Time: at, in, on
Preposition | Usage | Example |
At | at is for specific times | The exam is at 12:15 PM |
In | in is for nonspecific times during a day/month/year. | The exam is in the morning |
On | on for days and dates | The exam is on Monday. The exam is on Christmas Day. |
Prepositions of Place: at, in, on
Preposition | Usage | Example |
At | We use at for specific addresses. | I live at 50 Pong Lai Road. |
In | We use in for the names of land-areas (towns, counties, states, countries, and continents). | I live in Taipei. |
On | We use on for the names of streets, avenues, etc. | I live on Pong Lai Road. |
Prepositions for describing our work:
at company’s | I work at Comtrend |
in departments | in the marketing department, as a technical writer. |
on projects | I am working on a new manual |