Inversion with negative adverbs

[adelelsafty]

At no time

did the company break the law.

Compare:

The company did not break the law at any time.

Under no circumstances

should you travel alone.

Compare:

You should not travel alone under any circumstances.

Never in my life

have I seen such extraordinary behaviour.

Compare:

I have never seen such extraordinary behaviour in my life.
The telephone had been disconnected. Nor was there any electricity.

Compare:

There wasn't any electricity either.

Seldom

did we have any time to ourselves.

Compare:

We seldom had any time to ourselves.

Only in summer

is it hot enough to sit outside.

Compare: It's only hot enough to sit outside in summer.