Prepositions are one of the hardest parts of English to master, because usage is often fixed by convention rather than logic — the same relationship can use different prepositions in different contexts, and rules don't always translate between languages.

Prepositions of time: in, on, at

PrepositionUsed forExample
inMonths, years, seasons, longer periodsin July, in 2020, in the morning, in summer
onDays and dateson Monday, on July 4th, on my birthday
atPrecise clock times, and a few fixed expressionsat 6 p.m., at noon, at night, at the weekend

Prepositions of place: in, on, at

PrepositionUsed forExample
inEnclosed spaces, cities, countriesin the box, in London, in France
onSurfaces, and things like streets/floorson the table, on Main Street, on the second floor
atSpecific points or addressesat the door, at 24 Elm Street, at the bus stop

Prepositions of movement

PrepositionMeaningExample
toMovement toward a destinationShe walked to the station.
intoMovement to the inside of somethingHe walked into the room.
throughMovement from one side to the otherWe drove through the tunnel.
acrossMovement from one side to the other of a surfaceShe swam across the lake.
alongMovement following a lineThey walked along the river.

Fixed preposition + verb/adjective pairs

Many verbs and adjectives are followed by one specific, fixed preposition — these need to be learned as a pair, not derived from a rule.

ExpressionExample
interested inShe's interested in psychology.
afraid ofHe's afraid of spiders.
good atThey're good at chess.
depend onIt depends on the weather.
married toShe's married to a teacher.
responsible forHe's responsible for the budget.
Common mistake: Translating prepositions directly from your first language. "Married with," "depend of," and "good in" are frequent errors caused by direct translation — the safest fix is to learn each verb/adjective + preposition pair as a single fixed unit, ideally inside a full example sentence.

Prepositions vs. particles in phrasal verbs

Many English prepositions double as "particles" in phrasal verbs, where the combination creates an idiomatic meaning unrelated to the preposition's normal use — "look into" (investigate) has nothing to do with physically looking inside something. See our full Phrasal Verbs section for these combinations.

A practical approach to learning prepositions

  1. Learn time and place prepositions (in/on/at) as a system first — the table above covers the large majority of everyday cases.
  2. For fixed verb/adjective + preposition pairs, keep a running list of ones you personally get wrong, and review that list — not a generic master list.
  3. Notice prepositions while reading or listening rather than only studying rules; real exposure builds the intuition that pure rule-memorising can't.

Where to go next

Prepositions connect naturally to phrasal verbs and to idioms, many of which are built on fixed prepositional phrases. Practice what you've learned with our Grammar Quiz.

Keep learning: browse more Grammar notes or head back to the homepage to explore other subjects.