What is inversion?
Inversion means putting the auxiliary verb before the subject, as in a question, even though the sentence is a statement. We do it after certain negative or restrictive words placed at the start of a sentence, for emphasis and a formal, literary tone.
Pattern: negative word + auxiliary + subject + main verb
- If the verb has no auxiliary, add do / does / did: Rarely does she complain.
- Present perfect → have/has + subject: Never have I felt so proud.
- Past simple → did + subject + base verb: Not only did he lose, he also…
The main triggers
| Trigger | Pattern | Example |
|---|---|---|
| Never / rarely / seldom / little | adverb + aux + subject | Seldom do we see such talent. |
| Hardly … when / Scarcely … when / No sooner … than | two events in quick succession | No sooner had she arrived than it began to rain. |
| Not only … but (also) | Not only + aux + subject | Not only did he apologise, but he also paid for it. |
| Only after / only when / only if / only then | Only + time clause, aux + subject | Only after the exam did I relax. |
| Under no circumstances / On no account / At no time | restriction | Under no circumstances should you open it. |
| So + adjective … that / Such … that | result | So tired was he that he fell asleep. |
Conditional inversion
In formal English you can drop if and invert instead: Had I known (= If I had known), Should you need help (= If you should need help), Were I you (= If I were you).
Normal (neutral)
- If I had known, I would have come.
- If you need help, call me.
Inverted (formal)
- Had I known, I would have come.
- Should you need help, call me.
Lots of examples
- Never have I seen such a beautiful sunset.Present perfect.
- Rarely does he speak in meetings.Present simple: does added.
- Hardly had we sat down when the music started.Hardly … when.
- No sooner had he left than the phone rang.No sooner … than.
- Not only did she win the race, but she also broke the record.Not only … but also.
- Only when I got home did I realise I had lost my wallet.Only when.
- Little did they know that the police were waiting.Little did.
- Under no circumstances should this door be left open.Prohibition.
- So loud was the music that we couldn’t talk.So … that.
- Had I realised the danger, I would have turned back.Conditional inversion.
- Should you require further information, please contact us.Formal letters.
- Not until she left the room did he speak.Not until.
Don’t say / Say
Don’t sayNever I have seen such a thing.
SayNever have I seen such a thing.Why: Invert auxiliary and subject.
Don’t sayRarely she complains.
SayRarely does she complain.Why: Add does and use the base verb.
Don’t sayNot only he apologised, but…
SayNot only did he apologise, but…Why: Add did; apologise returns to base.
Don’t sayNo sooner had he arrived when…
SayNo sooner had he arrived than…Why: No sooner takes than; hardly takes when.
Don’t sayOnly after the exam I relaxed.
SayOnly after the exam did I relax.Why: Invert after only + time expression.