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