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