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