Inversion reverses the usual subject-verb order. Common in formal writing and emphatic speech, often triggered by negative adverbs at the start of a sentence.
Normal
She had never seen such a thing.
Inverted
Never had she seen such a thing.
Effect
Adds emphasis, formality, drama.
Negative adverbs that trigger inversion
Never / Rarely / Seldom
Never have I seen such beauty. Rarely does she complain.
No sooner ... than
No sooner had I left than it started raining.
Hardly / Scarcely ... when
Hardly had we sat down when the bell rang.
Not only ... but also
Not only is she clever, but she is also kind.
Under no circumstances
Under no circumstances should you open this door.
Only + time/way
Only then did I realise the truth.
Inverted conditionals (review)
Had I known...
Had I known earlier, I would have come. = If I had known...
Were I to...
Were I to win the lottery, I would travel. = If I were to win...
Should you need...
Should you need assistance, contact us. = If you need...
Were it not for...
Were it not for your help, I would have failed.
The structure
Negative adverb + auxiliary + subject + main verb ✓
Statement
She had never seen anything like it.
Inverted
Never had she seen anything like it.
If no auxiliary, add do
She rarely complained → Rarely did she complain.
Inversion only at the BEGINNING of a sentence. If the negative adverb comes later, no inversion: She had never seen such beauty (normal).
Common mistakes
Never I have seen such a film.
→
Never have I seen such a film.
aux before subject
Hardly I had arrived when she called.
→
Hardly had I arrived when she called.
aux before subject after hardly
No sooner I had sat down when it rang.
→
No sooner had I sat down than it rang.
no sooner ... than (not when)
Recap
Structure
neg adverb + aux + subject + verb
Never have I seen...
Triggers
never · rarely · seldom · hardly · no sooner · not only