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