Welcome to the forum, aphrile. I am not sure what you mean. 'Would and would not' is not a prefix. Have you an example of a sentence containing the words you are asking about?
Student or Learner
I dont know exactly what kind of prefix is this. Can you explain more about this. the "would and would not" and how to use it. Pls. and thank u.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.