Why prepositions are hard
A preposition has no logical relationship to the noun after it. "in" goes with a building, a city and a month, and none of those three is "inside" anything. There is nothing to reason your way to, which is why even fluent speakers get them wrong and why a candidate can write an excellent essay with four or five repeated preposition errors in it.
They are also disproportionately visible. A long word misspelled is easy to overlook. "dependent of" is not.
The word-plus-preposition approach
Do not learn prepositions. Learn the phrase they belong to.
"Dependent" means nothing on its own for this purpose. "Dependent on" is the unit. Likewise "responsible for", "interested in", "capable of", "accused of", "consist of", "result in", "lead to", "suffer from".
This is not a shortcut. It is how the language is actually stored, and it is why a candidate who has learnt "on" as a standalone rule still writes "dependent of".
The pairs that come up most
| Correct | Often written as | Example |
|---|---|---|
| depend on | depend of | Success depends on sustained effort. |
| interested in | interested on | I am interested in environmental policy. |
| responsible for | responsible of | Parents are responsible for their children's safety. |
| capable of | capable for | She is capable of managing the project. |
| different from | different than | The results are different from what was expected. |
| listen to | listen | Listen to the recording twice. |
| look at | look | Look at the graph, not at the answer key. |
| wait for | wait | I will wait for the confirmation. |
| consist of | consist in | The committee consists of seven members. |
| result in | result to | Late replies resulted in missed deadlines. |
| accused of | accused for | He was accused of falsifying records. |
| familiar with | familiar of | Candidates should be familiar with the format. |
| similar to | similar with | The two charts are similar in shape but not in scale. |
Note "different from" rather than "different than". British usage, which IELTS follows, is *from*. "Than" appears after comparatives, not after "different".
Prepositions of time
| Use | For | Example |
|---|---|---|
| at | a specific point | at 6 am, at noon, at the weekend |
| on | days and dates | on Monday, on 15 March |
| in | months, years, longer periods | in January, in 2026, in the morning |
The three that catch candidates: "I was born in 1995", "I wake up at 6 am", and "in the morning" against "at night".
Prepositions of place
| Use | For | Example |
|---|---|---|
| at | a point | at the door, at the station |
| in | an enclosed space | in the room, in the car |
| on | a surface | on the table, on the wall |
"I am on the bus", not "in the bus" — you are on the vehicle, in the seat. "I am at home" takes no preposition at all beyond *at*.
Where there is no preposition
Some very common errors come from adding a word that should not be there.
- "discuss about" → discuss
- "enter into" → enter
- "marry with" → marry
- "mention about" → mention
- "The reason is because" → The reason is that
- "consist in" → consist of
What this costs in the band
Grammatical range and accuracy is 25 percent of the Writing score, and preposition errors sit inside it. They are also the easiest errors in that criterion to fix, because they are finite: the list above is most of it for an IELTS candidate.
Ten repeated preposition errors in a 250-word essay is a visible pattern, and a pattern reads as a gap in control rather than as four isolated slips.
The correction that works is error logging. Keep one file, note every sentence where you are unsure of the preposition, and check only that week's entries. A candidate who does this for a month typically arrives at a personal list of five or six phrases — which, because they learned phrases rather than prepositions, is also the whole of what they need to review before the test.
That is a better return than a grammar chapter, and it takes ten minutes a day rather than an hour.
The Grammar Portal has preposition exercises by difficulty, and the IELTS Practice Portal gives you timed writing so you can see whether the errors are actually going down.
🎯 Practice What You Learned
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