1 Precision Pick › 2 Precision Flip › 3 The Gauntlet
C1 Grammar Series · Lesson 2 of 3

🔄 Precision Flip

Flip the errors · Master three new structures · Build your C1 toolkit

Phase 1

The Precision Flip

Each sentence below has exactly one error — the same errors from the Precision Pick diagnostic. Your job: type the corrected version, then check. How many can you flip first time?

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out of 10 flipped correctly


Phase 2

Three New C1 Structures

These three patterns build on what you practised in the Precision Pick. Open each card, study the formula, and check you can spot the difference between correct and incorrect. You'll need all three in the Gauntlet.

Structure A — Negative Adverbial Inversion

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You already practised Not until…did in the diagnostic. The same inversion rule applies to a whole family of negative adverbials at the start of a sentence.

Never / Rarely / Seldom / Barely / Hardly / Not once / Under no circumstances + auxiliary + subject + main verb
✗ Wrong
Never I have seen such commitment to the project.
✓ Correct
Never have I seen such commitment to the project.
✗ Wrong
Rarely she speaks in public without preparation.
✓ Correct
Rarely does she speak in public without preparation.
✗ Wrong
Under no circumstances you should sign the contract without legal advice.
✓ Correct
Under no circumstances should you sign the contract without legal advice.
The inversion is subject + auxiliary swap, just like a question — but it is NOT a question. No question mark.

Structure B — Mandative Subjunctive

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In formal English, verbs expressing demands, recommendations, and necessity are followed by a bare infinitive in the that-clause — regardless of the subject.

demand / insist / recommend / suggest / require / propose / request + that + subject + bare infinitive (no -s, no did/was)
✗ Wrong
The judge insisted that he should apologise immediately.
✓ Correct
The judge insisted that he apologise immediately.
✗ Wrong
It is essential that the form is completed in full.
✓ Correct
It is essential that the form be completed in full.
No -s for third person: "She insists that he leave" (not leaves). No was: use were in all persons for the subjunctive of 'be'.

Structure C — Fronted Concession

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A sophisticated C1/C2 alternative to Although / Even though. The concessive phrase is fronted and compressed.

Much as / Try as / Hard as / Fond as / Strange as + subject + verb, main clause
✗ Informal version
Although I respect her work, I can't support her proposal.
✓ C1 version
Much as I respect her work, I can't support her proposal.
✗ Wrong
Try as he tried, he could not solve the problem. (redundant verb)
✓ Correct
Try as he might, he could not solve the problem.
✗ Wrong
Much as I would like agree, the evidence is unclear.
✓ Correct
Much as I would like to agree, the evidence is unclear.
"Try as he might" is fixed — don't swap "might" for "tried". "Much as" is always followed by a full clause.
Phase 3

Quick Fire — New Structures

Six rewrite tasks, two for each new structure. Use the starter provided. Don't worry about perfection — focus on getting the structure right.

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out of 6 correct

Final challenge: The C1 Gauntlet →