Grammatical Range & Accuracy, decoded: why “frequent error-free sentences” is the real gate

Grammatical Range & Accuracy has two words learners misread. “Range” becomes stack more subordinate clauses, so essays fill with tangled, error-prone sentences. “Accuracy” loses to ambition, as if attempting a hard structure earns credit even when it breaks. The band-7 descriptor settles both with one phrase: frequent error-free sentences.

What the descriptor actually rewards

The public band descriptors describe band 7 Grammatical Range & Accuracy as using a variety of complex structures, producing frequent error-free sentences, and keeping good control of grammar and punctuation with only a few errors. Band 6 already credits a mix of simple and complex forms—but with errors that, while they rarely stop the reader, are noticeable. descriptor · paraphrase · ielts-descriptors The gate from 6 to 7 is not harder sentences; it is a higher proportion of sentences that are clean. The Grammatical Range & Accuracy guide lays out the band-by-band moves.

“Range” is not clause-stacking

Most learners read “a variety of complex structures” as “more subordinate clauses,” and start bolting relative and adverbial clauses onto everything. The research points the other way. Biber, Gray and Poonpon (2011) showed that clausal subordination—the T-unit and dependent-clause counting many people equate with complexity—is actually characteristic of conversation, not academic writing. research finding · biber-2011 Advanced academic complexity is largely phrasal: denser noun phrases, with modifiers and prepositional phrases, not longer chains of clauses.

Banerjee, Franceschina and Smith (2007), analysing real scripts across bands, likewise found grammatical sophistication rising with band—but only when it is used in control. research finding · banerjee-2007 So “range” means a controlled variety you can handle, including phrasal density, not a pile-up of clauses you cannot.

Why “frequent error-free sentences” is the gate

The band-7 phrase is about frequency. A grader is not counting how hard you tried; they are noticing how often a whole sentence lands without an error. An ambitious complex sentence carrying two mistakes scores below a simpler sentence that is correct. This inverts the instinct that harder is safer: above band 6, the reliable way up is to raise the share of your sentences that are clean, not the difficulty of the ones that are not.

Accuracy is usually a few recurring errors

For most learners, lost accuracy marks are not spread evenly—they cluster in a handful of error types that repeat across the essay:

• articles—when to use a, the, or nothing;
• subject–verb agreement—singular and plural, especially at distance;
• verb tense and form—consistency, and the right form after auxiliaries;
• prepositions—the small words that collocate with nouns and verbs.

Fix the two or three that actually recur in your writing and your error-free rate jumps. Bitchener (2008) found that focused correction—targeting a few specific error types—improved learners’ accuracy, and the gain held two months later. research finding · bitchener-2008 Trying to fix every error at once tends to work less well than fixing a few, thoroughly.

What to do instead

1. Find your recurring error types. Get a piece of writing marked and look for the two or three mistakes that appear again and again—those are your highest-value targets.
2. Build a few complex structures you fully control. Two reliable patterns you can deploy accurately beat ten you attempt shakily.
3. Write to be correct, not impressive. A clean mix of simple and complex sentences outscores an ambitious tangle.
4. Proofread for your known errors last. Spend the final minutes hunting specifically for your recurring types, not reading for general “flow.”

What this does and doesn’t say

This is not “write only simple sentences.” Band 7 genuinely needs a variety of complex structures—range still counts. The point is what range and accuracy actually mean: range is controlled variety, including the phrasal density the research highlights, and accuracy—frequent error-free sentences—is the gate above band 6. The research here is descriptive and, for corrective feedback, context-specific; none of it promises a particular band from a particular drill.

So when you next reach for a harder sentence, ask whether you can land it cleanly. If not, the simpler correct one scores higher—and fixing the errors you already make repeatedly moves the criterion faster than new grammar does. The Grammatical Range & Accuracy guide shows what each band actually rewards.