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