title: list of english verbs and their tenses, various forms, etc
body: <p>Is there a huge CSV/XML or whatever file somewhere that contains a list of english verbs and their variations (e.g sell -> sold, sale, selling, seller, sellee)?</p>
  
  <p>I imagine this will be useful for NLP systems, but there doesn't seem to be a listing anywhere, or it could be my terrible googling skills. Does anybody have a clue otherwise?</p>