Of all the corrections I write on my Italian students’ homework, prepositions are by far the most frequent. Not because they are hard in a conceptual sense (nobody is frightened by in, on, at the way they are frightened by the present perfect) but because there are so many of them, they are tiny, and getting them wrong is the mistake that more than any other says “not a native speaker”.
The good news: there is more logic than it seems. The bad news: part of it really has to be learned by heart, and it is better to know this straight away than to look for a rule that does not exist. In this article I separate the two things: what you can reason out and what you have to memorise.
Why Italians get exactly these wrong
Italian covers with a single preposition situations that English splits into three. Think of a: a Milano, a maggio, alle otto, a casa. In English they become in Milan, in May, at eight, at home. Four contexts, three different prepositions, one single Italian word to start from.
The natural reflex is to translate the Italian preposition. And that is exactly the reflex that has to be defused: prepositions are not translated, they are associated with the context. To do this you need two mental models, one for time and one for space, plus a list.
Time: the zoom rule
Imagine looking at a calendar and gradually moving closer. The longer the period, the “wider” the preposition.
IN → long periods: months, years, seasons, centuries, decades, parts of the day. Right: in July, in 2026, in winter, in the 1990s, in the morning, in the afternoon
ON → days and precise dates: days of the week, dates, special days. Right: on Monday, on 14 August, on my birthday, on Christmas Day, on Friday evening
AT → points in time: clock times, and some fixed expressions. Right: at 7:30, at midnight, at lunchtime, at night, at Christmas (the Christmas period, not the day)
Note the pair that confuses everybody: on Christmas Day (25 December) but at Christmas (the holidays in general). And in the morning but at night: the latter is a historical irregularity, there is no logic to understand, you just learn it.
Beware also of on Friday evening: when you specify the day, on wins over in, even though “evening” on its own would take in.
Wrong: “I have a meeting in Monday.” Right: “I have a meeting on Monday.”
Wrong: “See you at July.” Right: “See you in July.”
Wrong: “The call is in 3 p.m.” Right: “The call is at 3 p.m.”
And an important note: with next, last, this, every the preposition disappears altogether. Wrong: “I’ll call you on next Monday.” Right: “I’ll call you next Monday.”
Space: container, surface, point
For place the model is geometric.
IN → inside an enclosed space or a delimited area. Cities, countries, rooms, containers. Right: in Italy, in Milan, in the kitchen, in my bag, in the car, in bed, in the photo
ON → on a surface, or along a line. Right: on the table, on the wall, on the third floor, on the left, on the coast, on page 12
AT → a precise point, seen as a position and not as a volume. Right: at the station, at the door, at home, at work, at school, at the traffic lights
The most useful difference to take in is in vs at referring to the same place. At treats it as a functional point, in as the physical space you are inside:
Right: “I’ll meet you at the office.” The office as the place of the appointment. Right: “It’s freezing in the office.” Inside the office, the environment.
And then there is the classic case of means of transport, where Italian always says “in” and English almost never does:
Wrong: “I’m in the bus.” Right: “I’m on the bus.” And so on the train, on the plane, on a bike Right: “I’m in the car.” / “in a taxi”: only small, private vehicles take in
The unspoken criterion is: if you can walk around inside it, it is on.
The prepositions you have to learn by heart
Here the logic ends and the list begins. Very many English verbs and adjectives “demand” a specific preposition that does not match the Italian one. These are the so-called dependent prepositions, and they are responsible for a good part of the mistakes I read in work emails.
| Correct in English | The Italian speaker’s mistake |
|---|---|
| depend on | Wrong: depend from (from Italian dipende da) |
| interested in | Wrong: interested to (from interessato a) |
| good at / bad at | Wrong: good in (from bravo in) |
| married to | Wrong: married with (from sposato con) |
| arrive in (a city) / arrive at (a place) | Wrong: arrive to (from arrivare a) |
| listen to | Wrong: listen music (from ascoltare musica) |
| wait for | Wrong: wait somebody (from aspettare qualcuno) |
| belong to | Wrong: belong at |
| congratulations on | Wrong: congratulations for |
| afraid of | Wrong: afraid from |
| think about / think of | Wrong: think to (from pensare a) |
| participate in | Wrong: participate to (from partecipare a) |
And three verbs that in English take no preposition at all, while in Italian they do:
Wrong: “Let’s discuss about the budget.” Right: “Let’s discuss the budget.”
Wrong: “I phoned to my colleague.” Right: “I phoned my colleague.”
Wrong: “She entered in the room.” Right: “She entered the room.”
Three pairs that change the meaning
Some prepositions are not “right or wrong”: they change the meaning of the sentence. It is worth knowing them precisely, because at work the difference is substantial.
in time (with room to spare, early enough) vs on time (punctual, at the exact hour) Right: “We arrived just in time to catch the train.” We made it by a whisker. Right: “The train left on time.” It left punctually.
at the end (at the end of something concrete) vs in the end (finally, after everything) Right: “There’s a summary at the end of the report.” Right: “In the end, we decided not to hire anyone.”
in the way (obstructing) vs on the way (during the journey) Right: “Sorry, is my bag in the way?” It is a nuisance. Right: “I’ll buy some coffee on the way home.” Along the way.
How to really practise them (and what does not work)
Studying a table of prepositions by heart is among the least effective activities I know: after two days nothing is left, because prepositions do not live on their own but always attached to another word.
What works:
- Memorise the block, not the preposition. Do not learn “on is used with congratulations”, but the whole chunk: “Congratulations on your promotion!” The brain retrieves sentences far better than rules.
- Keep a personal list of your own mistakes. The prepositions you get wrong are always the same five or six, because they depend on your first language and your habits. Five lines in a notebook beat any manual.
- Read aloud. Prepositions are weak and lightly stressed: hearing them in the rhythm of the sentence (I’m interested in it) fixes them better than silent reading.
- Get corrected while you produce. It is the only way to notice a depend from that you have been repeating for years without anyone ever pointing it out. This is exactly the kind of targeted work we do in the English lessons.
Prepositions are the detail that nobody teaches systematically and that everybody notices. Fixing them does not take months: it takes constant attention to a surprisingly small number of recurring cases.
I have collected the other mistakes Italians fall into most often separately: false friends, past simple and present perfect, phrasal verbs and pronunciation. To practise reading and writing against the clock, try the English second paper practice test.
If you want to work on them starting from the situations you really need (emails, interviews, exams, conversation), take a look at the English lessons above or write to me to set up a tailor-made programme.
