Advanced inversion
Put the auxiliary before the subject after negative and restrictive openings to add emphasis in formal English.
20 minAdvanced
1The grammar
When a negative or restrictive adverbial opens a clause, the auxiliary comes before the subject, as in a question: 'Never have we seen such volatility.' If the clause has no auxiliary, add do, does or did and use the base form of the main verb: 'Rarely does the board meet in August.'
Frequent triggers are never, rarely, seldom, hardly, scarcely, barely, little, no sooner, not only, not until, only when/after/if/by, at no time, under no circumstances and on no account. With 'only' and 'not until' followed by a clause, the inversion happens in the main clause: 'Only when the data were checked did the error emerge.' Fronted 'so + adjective' and 'such' also invert: 'So severe was the damage that the bridge closed.'
Not every opening with a negative word triggers inversion. There is none when 'only' simply modifies the subject ('Only the chair may vote'), or when the phrase does not negate or restrict the clause ('Not long afterwards, the bank closed'; 'In no time, the queue had gone').
Inversion is formal and emphatic. In everyday speech, normal word order ('We have never seen this') is the usual choice and is not a mistake.
2Structure and formation
Negative adverbial + auxiliary + subject
Never/Rarely/Seldom + auxiliary + subject + verb
Seldom have voters been so divided.
No auxiliary: add do
Rarely + do/does/did + subject + base verb
Rarely does the court reverse its own ruling.
Two linked events
No sooner had + subject + past participle + than ...; Hardly had + subject + past participle + when/before ...
No sooner had the polls closed than the first results appeared.
Only + expression
Only when/after/if + clause, + auxiliary + subject + verb
Only after the vote did the minister speak.
So/Such
So + adjective + be + subject + that ...; Such + be + subject + that ...
Such was the backlog that hearings were delayed for a year.
3Examples
Never before have the markets reacted so quickly to a single announcement.
'Never before' is followed by the auxiliary 'have', then the subject.
Rarely does the committee overturn a decision once it has been published.
There is no auxiliary in the neutral sentence, so 'does' is added and 'overturn' is in the base form.
Hardly had the ceasefire been announced when fighting resumed in the north.
'Hardly' pairs with 'when' or 'before' and usually with the past perfect.
Only by cutting costs could the airline avoid bankruptcy.
'Only by' + -ing is followed by inversion in the same clause.
Not until the final audit did the scale of the losses emerge.
After the 'not until' phrase, the main clause is inverted.
So persuasive was her testimony that the jury reached a verdict within an hour.
'So' + adjective is fronted for emphasis and 'be' comes before the subject.
Not only did the bank underestimate the risk, but it also concealed the losses from regulators.
Only the 'not only' clause is inverted; the 'but also' clause keeps normal order.
4Common mistakes
Never I have seen such poor results.
Never have I seen such poor results.
After a fronted negative adverbial, the auxiliary must come before the subject.
Only after the vote the minister resigned.
Only after the vote did the minister resign.
'Only after ...' requires inversion in the main clause, with 'did' and the base verb.
Seldom does the board meets in August.
Seldom does the board meet in August.
After 'does', the main verb is in the base form.
No sooner had the minister spoken when protests began.
No sooner had the minister spoken than protests began.
'No sooner' is a comparative form, so it pairs with 'than'.
Not only the report was late, but it was also inaccurate.
Not only was the report late, but it was also inaccurate.
A clause opening with 'not only' takes inversion.
5Practical usage
Formal writing
Use inversion sparingly in reports, essays and articles to give one point special weight. Too many inverted sentences sound mannered.
Speeches and journalism
Patterns such as 'Never before ...' and 'Not only ... but also ...' give rhetorical force to speeches and editorials.
Rules and notices
Formulas such as 'Under no circumstances should ...' and 'On no account must ...' are common in official instructions.
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