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Grammar & Vocabulary

Prepositions On, At, and In - Basic English Grammar

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Callens Language Institute

March 2026 | 8 Min

Prepositions On, At, and In - Basic English Grammar
*Article focus
English Grammar
Prepositions
Basic Grammar

Prepositions of Time

Use at for a precise time, on for a day or date, and in for a month, year, season, or longer period.

Checklist
  1. 1at 7 o'clock
  2. 2on Monday
  3. 3on 15 August
  4. 4in July
  5. 5in 2026
  6. 6in winter

Prepositions of Place

Use at for a point or activity, on for a surface, and in for an enclosed area or larger location.

Checklist
  1. 1at the station
  2. 2on the table
  3. 3in the room
  4. 4in Delhi

Common Errors

Learn the full phrase rather than translating each preposition directly from another language. Read and say example sentences until the pattern becomes familiar.

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Prepositions On, At, and In - Basic English Grammar | Callens Institute