Grammar - inversion for emphasis or formality

 Explanation

Read parts 1, 2, 3 and 4 here carefully:

https://www.perfect-english-grammar.com/inversion.html

and then

https://www.clarkandmiller.com/inverted-conditionals-have-you-mastered-this-advanced-english-trick/

https://www.youtube.com/watch?v=lgNSRr9-Fbo

https://www.youtube.com/watch?v=I8zQaJZEfz0

https://www.youtube.com/watch?v=RmQH6B9P8r8

https://www.hornerschool.com/inversion-negative-adverbials/

Exercises

https://www.perfect-english-grammar.com/inversion-exercise-1.html

http://random-idea-english.blogspot.com/2011/05/negative-inversion-practice-exercises.html

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-88760.php

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-116807.php

https://test-english.com/grammar-points/b2/inversion-negative-adverbials/

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-89063.php

https://test-english.com/grammar-points/b2/inversion-negative-adverbials/

https://www.luizotaviobarros.com/negative-inversion-examples/