Learn English – Not until structure

sentence-meaning

The following sentence contains inverted word order in the main clause:

Not until that evening was she able to recover her self-control.

It sounds like a question. But there is no question mark at the end of the sentence. What is actual meaning of it?

It is not a question. It is synonymous with:

Not until that evening she was able to recover her self-control.

and

Until that evening she was not able to recover her self-control.

and

It was not until that evening that she was able to recover her self-control.