“Do a mistake” is the single most common error I hear from good English students.

Not beginners — good ones. B2, C1, people who can discuss politics and understand films without subtitles. And still: I did a mistake in the email.

The reason is simple. In most languages, one verb covers both. In English there are two, and the split is not logical. But it is learnable, and there is a pattern underneath it that nobody teaches properly.

The rule that actually works

DO is for tasks, jobs and vague activity. Things you carry out. Work that exists whether or not you do it — the washing-up exists as a task before you touch it.

MAKE is for creating and producing. Something exists afterwards that did not exist before. You make a cake, a decision, a mess, a promise, a noise.

Test it: make a mistake — before you spoke, the mistake did not exist. You produced it. Do the washing-up — the dirty plates were already there. You performed a task.

That gets you perhaps 80% of the way. The rest is memorised pairs, and here they are.

DO — the ones worth knowing

• do your homework · do the housework · do the washing-up · do the shopping
• do your best · do your duty · do a good job
• do business with · do a deal
• do research · do an experiment · do a course
• do someone a favour · do good · do harm · do damage
• do exercise · do your hair · do the dishes
• do nothing · do something · do anything

MAKE — the ones worth knowing

• make a mistake · make an error
• make a decision · make a choice · make plans
• make an effort · make progress · make an attempt
• make money · make a living · make a profit
• make a promise · make an excuse · make an apology
• make a phone call · make an appointment · make a reservation
• make friends · make an impression · make a difference
• make a noise · make a mess · make trouble
• make sense · make sure · make up your mind

The pairs that catch everyone out

do an exam or take an exam — both fine. Never make an exam (that means writing the paper yourself).

make a bed means tidying the sheets. Build a bed is carpentry.

do your hair — style it. Make your hair means nothing.

make a suggestion, but do a presentation. No logic. Just learn the pair.

do the cooking (the task, generally) but make dinner (this specific meal, which now exists).

Why this matters more than grammar

A learner who says “I did a mistake” is instantly identifiable as a non-native speaker, even if every other word is perfect. A learner who says “I made a mistake” sounds fluent, even with an accent.

This is the difference between correct English and natural English — and it is almost entirely a matter of which words travel together. Grammar books cover tenses exhaustively and collocations barely at all, which is why so many advanced students plateau.

How to fix it for good

Stop learning verbs alone. When you meet a verb, learn three nouns that go with it. Make on its own is useless; make a decision / make an effort / make sense is usable English.

Keep a notebook of pairs, not words. It will be shorter, uglier and far more effective.

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Written by a working English teacher who got tired of watching good students sound stiff.

Related: 60 English collocations that instantly make you sound more natural · 40 advanced English words that make you sound C1