Prepositions in English: In, On, At and More
How to use English prepositions: in, on and at for time and place, common word pairings, and the preposition mistakes to avoid, with examples.
Prepositions are small words like in, on, at, to, for, with that show relationships of time, place and direction. They rarely translate word for word, which is why even fluent speakers second-guess them. Here are the patterns that clear up most confusion.
In, on, at for time
| Preposition | Use for | Examples |
|---|---|---|
| at | clock times, points | at 6 o’clock, at night, at noon |
| on | days and dates | on Monday, on 5th May, on my birthday |
| in | longer periods | in July, in 2025, in the morning, in winter |
In, on, at for place
| Preposition | Use for | Examples |
|---|---|---|
| at | a specific point | at the bus stop, at the door, at home |
| on | a surface or line | on the table, on the wall, on the second floor |
| in | an enclosed space or area | in the room, in Mumbai, in a car |
Prepositions that go with certain words
Many prepositions are simply fixed with the word before them. These are learned as pairs, not worked out by logic.
- good at, interested in, afraid of
- depend on, listen to, wait for
- married to, similar to, different from
To and other movement prepositions
Use to for direction toward a place. Note the fixed phrases go home and arrive at/in with no to.
- I am going to the office.
- I am going home. (no to)
- We arrived at the airport / in Delhi.
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When do I use in, on and at?
Zoom from small to large. For time: at a point (at 5), on a day (on Monday), in a longer period (in May). For place: at a point (at the door), on a surface (on the table), in an area (in the room).
Is it good in English or good at English?
It is good at English. Good is followed by at when you talk about a skill. Many such pairs, like interested in and afraid of, are fixed and simply have to be learned together.
Why are prepositions so hard to get right?
Because they rarely translate directly and many are fixed by habit rather than rule. The reliable way to master them is hearing and speaking correct phrases repeatedly, which a 1-on-1 tutor can drill with your own sentences.
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