If you want to know how to use these expressions-typically used for emphasis-you can have a look at the Google site below
- Not only can you …but you can also…
- Never have I seen…
- Seldom do you meet…
- Little did she know…
- No sooner had I …than
https://sites.google.com/view/inversions-negatives/home
It contains:
- a. a tutorial explaining when and how to use these structures
- b. clips taken from TV shows/films/radio shows illustrating each of the possible inversions
- c. exercises to practise these inversions, together with the key to answers (pdf and tutorial explaining the answers).
(First published 10.02.2019, updated 22.07.2021)
Related post: inversions for conditional clauses
If you want to practise these inversions you can play this game.