Negative adverbial
I had never seen such a beautiful sunset.
Never had I seen such a beautiful sunset.
You can enter only if you have a ticket.
Only if you have a ticket can you enter.
I didn’t realise my mistake until I got home.
Not until I got home did I realise my mistake.
You must not touch this under any circumstances.
Under no circumstances must you touch this.
The paper will be accepted only if all reviewers agree.
Only if all reviewers agree will the paper be accepted.
He rarely speaks to strangers.
Rarely does he speak to strangers.
You’ll understand the rule only when you see an example.
Only when you see an example will you understand the rule.
He hasn’t visited us since last summer.
Not since last summer has he visited us.
They were never informed at any time.
At no time were they informed.
They had not collaborated since the controversial article was released.
Not since the controversial article was released had they collaborated.
She had hardly finished her meal when the phone rang.
Hardly had she finished her meal when the phone rang.
We noticed the error only then.
Only then did we notice the error.
I didn’t complain once during the trip.
Not once did I complain during the trip.
It is not acceptable by any means.
By no means is it acceptable.
The lights went out as soon as they entered the room.
No sooner had they entered the room than the lights went out.
She finished her dinner, and immediately after, she left for the party.
No sooner had she finished her dinner than she left for the party.
He understood the true scope of the theory only after reading the appendix.
Only after reading the appendix did he understand the true scope of the theory.
He didn’t say a single word until the end.
Not a single word did he say until the end.
He should not leave the premises in any case.
In no case should he leave the premises.
The audience didn't expect the speaker to address such controversial topics.
Little did the audience expect the speaker to address such controversial topics.