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