Inversions in English
In English, inversions are used in formal writing and are very easy to use.

Their most typical usage is to replace if in conditional structures.

The structure is very simple, and writing an inversion very easy.

Typical structure – subject + aux. + verb
Inversion – aux. + subj. + verb

Normal
If I had known Ricardo was stupid I wouldn’t have married him.

Inversion
Had I known Ricardo was stupid I wouldn’t have married him.

Normal
If she studied she would pass the exam.

Inversion
Were she to study she would pass the exam.

We also use inversions with certain words such as seldom, rarely, never, hardly, scarcely, etc.

Normal
She had seldom seen such a handsome man.

Inversion
Seldom had she seen such a handsome man.

Using inversions is so simple, there really is no excuse not to use them in a report, formal essay, etc. Try them.