I have discontinuously but repeatedly and tirelessly been writing, that should be a tense, or I may probably still be writing, I might pretty much definitely still be writing, I don't think I am writing any more, not normal writing, anyway, but I might not ever have intermittently not written, that should definitely be a tense. I will not ever have probably not been writing, I doubt I will have ever not been writing, I suppose it is likely that I have for a certain indefinable period not been writing, and yet I might have always been in an indefinite state between writing, being about to write, and almost finishing writing, those aren't tenses, but why not? 

A Short Introduction To Anneliese