Present, Future 否めない is [x] 否めなくない is not [x] Past 否めなかった was [x] 否めなくなかった was not [x] Te-form, Continuative 否めなくて is [x] and... 否めなくなくて is not [x] and... Provisional 否めなければ if it is [x] 否めなくなければ if it is not [x] Conditional 否めなかったら when/if it is [x] 否めなくなかったら when/if it is not [x] Adverbial 否めなく [x]-ly Noun form 否めなさ [x]-ness