I am looking for a list of common English verbs (1000 to 2000 most-frequent) which gives the distinct inflectional forms (spelled: pronunciation is irrelevant). For example, "sits, sit, sat, sat, sitting", "eats, eat, ate, eaten, eating". The purpose of the list is to serve as a component of a verb-generating program in another language. I don't want to have to devise orthographic rules to convert /sit+ing/ into [sitting] and manually typing a list is something I want to avoid. Does such a list already exist?
I have no idea of the frequency, but here is a downloadable list of 1,000 verbs with each of the five forms from the Bangladesh University of Business and Technology