Your guide to help you choose the right preposition. This guide was made to help people who use english as a second language. It may become handy when making presentations or documents in english.

1. On, In or At?
Your guide to help you choose the right preposition

2. Used to express the surface of something:
- On the table; On the Desk
Used to indicate a part of the body:
- a ring on my finger; on my shoulder
To indicade a devide or machine:
- She is on the phone; on the computer
ON

3. IN
Used to indicate a shape, color or size:
- Painted in red; in a circle; in diferent size;
Used to express while doing something:
- in preparing a report; in marketing.
Used to express a belief, an opinion or feelings:
- I belief in the after life; interested in gambling

4. AT
Used to indicate an email address:
- Email me at ...@...;
Used to indicate an activity:
- I'm good at drawing; He laugh at my acting

5. Time Place
Although the three prepositions may be used for time and
place, it is important to first understant the context of the
sentence.

6. Time PlaceProposition
IN
General
ON
Specific
Very Specific
AT
Centuries; Years;
Months; Seasons; Weeks
Days; Dates;
Weekends
Hours;
Countries; Cities;
Neigborhoods
Streets;
Avenues
Address and Specific
Locations