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TOEIC Link Part 5 — No Sooner Than and Hardly When: The Inversion and Correlative That Trip Even Advanced Takers

When a sentence opens with No sooner or Hardly, Part 5 forces two decisions at once: the verb must invert to a question-like order, and each opener demands its own partner word — than for no sooner, when for hardly and scarcely. This guide gives you the fixed pairings, the past-perfect-then-past tense split that follows almost every item, and the distractor logic that punishes writing them as ordinary sentences.

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No sooner ____ the CEO announced the merger than the share price jumped. The options offer had, has, did, and the. Most learners never inverted a sentence like this in their own writing, so they reach for a word that keeps normal order and lose the mark. The answer is had, and choosing it means recognizing two rules that fire together: an opening negative adverbial inverts the verb, and no sooner is one half of a fixed pair whose other half is than. This guide turns both into a mechanical check.

Why the sentence flips its order

English normally puts the subject before the verb: The CEO had no sooner announced.... But when you move a negative or restrictive adverbial to the front for emphasis, the subject and auxiliary swap into question-like order — the same inversion you see in Never have I seen... and Rarely does she travel. No sooner, hardly, scarcely, and barely all carry that restrictive, near-negative force, so fronting any of them triggers the flip.

That is why the opening item cannot be No sooner the CEO had announced — that keeps subject-first order, which the fronted no sooner forbids. It has to be No sooner **had** the CEO announced, with the auxiliary jumping ahead of the subject. This is the same inversion mechanism at work in conditional inversion when you omit if in formal registers — front a trigger word, and the verb moves.

The fixed partner: than for no sooner, when for hardly

The second half of the trap is that each opener demands a specific partner word later in the sentence, and TOEIC loves to swap them:

  • No sooner ... than — No sooner had the shipment arrived **than** the next order came in.
  • Hardly / Scarcely ... when — Hardly had the meeting started **when** the fire alarm rang.
  • Barely ... when — Barely had she sat down **when** the phone rang.

The single most common distractor is No sooner ... when or Hardly ... than — the right structure with the wrong partner. Memorize the two pairings as a unit: no sooner takes than; hardly/scarcely/barely take when. If the item gives you the opener, the correct partner is fixed before you read another word. This pair-locking is the same discipline you practice with correlative conjunctions like either/or and not only/but also — one half predicts the other.

The tense split: past perfect, then simple past

Almost every item of this type describes two events where one barely preceded the other. English marks the earlier event with the past perfect (had + past participle) and the later event with the simple past:

  • No sooner **had** the auditor **left** (past perfect, earlier) **than** the discrepancy **surfaced** (simple past, later).
  • Hardly **had** we **published** the report **when** a correction **arrived**.

So the inverted auxiliary is nearly always had, not did or has. In the opening item, did is the trap for learners who hear "past" and grab the past-tense auxiliary; but two sequenced past events need the past perfect on the earlier one, so had wins. If you see did offered after no sooner or hardly, treat it as a distractor unless the sentence has only one event — which these constructions, by design, never do.

The three-step check on the page

When a Part 5 item opens with No sooner, Hardly, Scarcely, or Barely:

  1. Invert. The next word must be an auxiliary (almost always had), not the subject. Eliminate any option that keeps subject-first order.
  2. Lock the partner. No sooner → than; hardly/scarcely/barely → when. If the blank is the partner word, this decides it outright.
  3. Choose the tense. The fronted clause reports the earlier event, so use the past perfect had + participle; the second clause takes simple past.

Worked examples

  • Scarcely ____ the presentation finished when the questions began. → had (invert + past perfect; scarcely ... when is the pair).
  • No sooner had the contract been signed ____ the client requested changes. → than (partner of no sooner).
  • Hardly had the new system gone live ____ complaints started arriving. → when (partner of hardly).
  • No sooner ____ we cut prices than sales doubled. → did is tempting, but the standard inverted form here is had ... cut; among had/did/have/was, choose had.

Why this cluster rewards pattern recognition over grammar feel

These sentences almost never appear in casual writing, so you cannot lean on what "sounds right." That is exactly why they are reliable Part 5 fodder — they test whether you know the construction rather than whether you have heard it. Once the three-step check is automatic, this item type flips from a guess to a near-certain mark. Reinforce it alongside the broader family of fronted-emphasis structures, and pair your study with so/such ... that and too/enough constructions, which share the same "opener predicts a later partner word" logic.

Drill ten of these under time pressure and the inversion stops looking backwards. The auxiliary jumps forward, the partner word locks, the past perfect marks the earlier event — three moves, one mark, every time.