Prepositions of Time and Place
Use in for months, years, and seasons (in June, in 2024), on for specific days and dates (on Monday), and at for exact times and points in space (at 3 PM, at home) — think big to small: in the biggest unit, on the middle one, at the smallest point.
Formula
Examples
Usage
- •Locating events and objects in time
- •Indicating physical location and position
- •Expressing duration and frequency
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In covers the biggest time periods: months, years, seasons, and centuries — "in June", "in 2024", "in winter". On covers specific days and dates — "on Monday", "on 15th July". At covers exact points in time — "at 3 PM", "at midnight", "at the weekend".
The same big-medium-small logic applies loosely to place: in for enclosed spaces ("in the room"), on for surfaces ("on the table"), at for specific points or addresses ("at the bus stop", "at 42 Main Street").
When do the rules have exceptions?
A few common phrases break the pattern and just have to be memorized: "at night", "at the weekend" (British English), "on the weekend" (American English). These are set expressions, not applications of the big-medium-small rule.
British and American English also differ on some place prepositions — "in the street" (British) vs "on the street" (American) — so both can be correct depending on the variety of English being used.
Comparison Table
| Form | Used for (time) | Used for (place) | Example |
|---|---|---|---|
| in | months, years, seasons | enclosed spaces | in June / in the room |
| on | days, dates | surfaces | on Monday / on the table |
| at | exact times | specific points, addresses | at 3 PM / at the bus stop |
Save this comparison chart
More Examples
She was born in March, in 1990.
"in" for months and years
We have a meeting on Thursday morning.
"on" for specific days
Let's meet at 6 PM at the coffee shop.
"at" for exact time and place
He's sitting in front of the building.
Preposition of place for position
Common Mistakes
- ✗❌ "in Monday" → ✓ "on Monday" (days use "on")
- ✗❌ "at June" → ✓ "in June" (months use "in")
- ✗❌ "on 3 PM" → ✓ "at 3 PM" (specific times use "at")
- ✗❌ "in the corner" → ✓ "at the corner" (a point/location uses "at")
Tips
- ✓Memory trick: in (big: years, months, seasons) → on (medium: days, dates) → at (small: exact times, points).
- ✓Exceptions: "at night", "at the weekend" (British), "on the weekend" (American).
Advanced Notes
Beyond the in/on/at trio, learners encounter a long tail of prepositions: "by" (deadline), "until" (duration), "since" (start point), "for" (duration), "during" (within a period), "between" (two points). These resist the big-medium-small mnemonic. British and American English differ notably: "at the weekend" (BrE) vs "on the weekend" (AmE), "in the street" (BrE) vs "on the street" (AmE). Preposition errors are among the most persistent in advanced learners because they are largely idiomatic.
FAQ
Is it "in Monday" or "on Monday"?
"On Monday" — days of the week always take "on", not "in". "In" is reserved for bigger time periods like months, years, and seasons.
Is it "at June" or "in June"?
"In June" — months take "in", not "at". "At" is for exact points in time, like a specific hour, not a whole month.
Is it "on 3 PM" or "at 3 PM"?
"At 3 PM" — specific clock times always take "at". "On" is for days and dates, not times of day.
Is it "in the corner" or "at the corner"?
Both exist with different meanings: "in the corner" of a room (an enclosed space) but "at the corner" of a street (a specific point). For a precise point or intersection, "at" is usually correct.
What is the memory trick for in, on, at?
Think big to small: in for the biggest units (years, months, seasons), on for the middle unit (days, dates), at for the smallest, most exact point (a specific time, or a precise place).
Practice
- 1.The meeting is Friday.
- 2.She was born 1990.
- 3.Let's meet 6 PM.
- 4.He works home most days.
- 5.We usually travel summer.
Compare With
Other A2 Topics
Present Continuous
Used for actions happening now or temporary situations
Past Continuous
Used for interrupted past actions or background description
Future with Going to
Used for decided plans and evidence-based predictions
Comparatives and Superlatives
Used for comparing qualities between items or identifying the extreme
Can / Could
Expresses ability, possibility, or polite requests
Adverbs of Frequency
Used for stating how often something happens
Possessive 's
Used for showing ownership or association using apostrophe + s
Quantifiers: Some, Any, Much, Many, A Lot Of
Used for unspecified quantities in positive, negative, and question contexts
Basic Linkers: And, But, Or, Because, So
Used for connecting ideas within or between sentences
Object Pronouns: Me, You, Him, Her, It, Us, Them
Used for replacing nouns as the object of a verb or preposition
Countable and Uncountable Nouns
Countable nouns can be counted (a book, two books); uncountable nouns cannot (water, money).
Too and Enough
Say when something is more than needed (too) or exactly enough (enough).
Adverbs of Manner
Adverbs of manner describe how an action happens.