Conversion- changing something into another- you could convert an active sentence into a passive one
inversion- changing to order
Inversion can be used when we have certain adverbs and phrases at the beginning of a sentence:
I had never seen such a mess.
Never
had I seen such a mess.
Never; rarely; no sooner; hardly; not only
It can used in conditionals to replace 'if':
If I had been there, things would have been different.
Had I been there, things would have been different.
It can be used after so + adjective + be
So great
was the storm...
This isn't a complete list and others will add to it soon.
