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You have done the tenses. You know your conditionals. Your grammar is, frankly, better than most native speakers’. And yet something in the room shifts slightly when you speak, and you cannot tell what.
It is almost never grammar. It is collocation.
What collocation actually means
Collocations are the word partnerships English has quietly agreed on. Not rules — habits. Nobody chose them and no book of grammar will explain them.
- You make a mistake. You do not do a mistake.
- Rain is heavy. It is not strong.
- Tea is strong. It is not heavy.
- You take a decision in British English and make one in American, and both camps find the other slightly odd.
Every one of those is grammatically flawless in the wrong version. That is exactly the problem. Your sentence is correct and still not what a native speaker would say — and the listener notices without being able to say why. So do interviewers, and so do examiners.
Why textbooks leave you here
Most vocabulary teaching gives you a word and a translation. That gets you to B2 and then quietly abandons you, because from B2 upward the gap between correct and fluent is made almost entirely of collocation.
Learning single words faster does not close it. You need the words that travel with them.
How to actually learn them
- Record the partnership, never the word alone. Not decision — make a decision, reach a decision, a tough decision.
- Steal from real sentences. When you read something and it sounds effortless, write the whole phrase down. That is a collocation you have just been handed free.
- Write one sentence of your own. A phrase you have used once is a phrase you own. One you have only read is one you will recognise but never produce.
- Group by meaning, not alphabetically. Your brain retrieves by association, not by spelling.
Why examiners care so much
If you are sitting FCE, CAE, CPE or IELTS, the mark scheme rewards exactly this. Range and naturalness of language separates a 6.5 from an 8 far more reliably than grammatical accuracy does — by that level, everyone’s grammar is fine.
Get the whole thing
Vocabulary with Charlie
This post scratches the surface. 179 essential words for B2–C2 learners — each with its collocations, synonyms, antonyms and real example sentences rather than textbook ones. Plus a small dog with strong opinions about most of them. Instant PDF download, straight from us.
Both books — VERBS + NOUNS for €8.99 →
Or one at a time, €4.99 each: Verbs with Charlie · Nouns with Charlie
Prefer Amazon? Verbs · Nouns — same books, rather less of it reaches the dog.
Written by a working English teacher who got tired of watching good students sound stiff.
Related: 40 advanced English words that make you sound C1
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