Grammar in IELTS Writing: Why "No Mistakes" Isn't the Goal

Subject–verb agreement error, in plain sight, in a 7.5 essay. Here's another from the same script: This prevents people to go outside to exercise — the wrong verb pattern. And a spelling slip: celebraties.

That essay was still marked 7.5. Not because the examiner missed the errors — the published examiner comment names them — but because Grammatical Range and Accuracy does not require error-free writing at Band 7. The descriptor says it plainly: a variety of complex structures, frequent error-free sentences, and "a few errors persist."

If you have been trying to reach Band 7 by making fewer mistakes, this is the most important thing you can learn about the criterion. You may be optimising the wrong variable.

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What the criterion is actually measuring

Two things, weighted together, and the name tells you both.

Neither half can carry the criterion alone. And here's the trap almost everyone at 6.5 falls into.

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The safety trap

Once you learn that errors cost marks, the instinct is to protect yourself: shorter sentences, familiar structures, nothing risky.

Figure 1

Zero errors, and still Band 6

Safe Range restored

Many people work from home now. This is popular. Companies save money on offices. Employees save time. They do not travel to work every day. This is good for the environment too.

As remote work has become widespread, both employers and employees have found financial reasons to prefer it. Companies that no longer need large offices can cut their overheads significantly, while staff who avoid a daily commute save both money and several hours a week. There is also an environmental benefit, since fewer journeys mean lower emissions.

Complex structure carrying real work

Six sentences become three. Every mark on the right is a structure the safe version could not show.

Six sentences. Zero errors. And squarely Band 6, because there is no complex structure anywhere — no subordination, no relative clause, no conditional. Accuracy is perfect and Range is absent, so the criterion cannot go above the middle.

Now the same content with range restored — the second state of the figure above.

Three sentences instead of six. A subordinate clause, two relative clauses, a while contrast, a causal since. If one of those clauses contained a small article error, this version would still outscore the flawless simple one — because Band 7 tolerates a few errors and does not tolerate an absence of range.

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What errors actually cost, ranked

Not all errors are equal. In rough order of damage:

This ranking matters because it tells you where proofreading time goes. Hunting every article in a 260-word essay is a poor use of five minutes. Fixing two run-on sentences is an excellent one.

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Raising Range without wrecking Accuracy

You don't need exotic grammar. You need three or four structures you can produce reliably, used where they fit.

Four structures, deployed maybe six times across an essay, is enough to demonstrate range. You don't need every sentence to be complex — an essay of nothing but long subordinated sentences reads worse and produces more errors.

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How to measure yourself

Forget counting mistakes. Count clean sentences instead.

Take your last practice essay. Number every sentence. Mark each one as error-free or not. Then compute the fraction.

Figure 2

Fifteen sentences, three diagnoses

Around a third cleanAccuracy is the anchor. Find your three repeat error types and drill those specifically.

Two-thirds clean, every sentence simpleRange is your anchor, not accuracy. Adding complexity will raise the band even if it introduces a few new errors.

Most clean and several complexYou're at the Band 7 shape. Keep going.

Error-free simple sentence Error-free complex sentence Contains an error

Two essays can share an error count and sit a band apart. The middle row is where most 6.5 writers actually are.

Most people at 6.5 are in the second group and spend all their effort acting like they're in the first. That mismatch is why the score doesn't move.

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The one-line summary

Counting your own error-free sentences is tedious and, worse, unreliable — the errors you can't see are precisely the ones you make. That's the part we automated.