Present, Future 体が弱い is [x] 体が弱くない is not [x] Past 体が弱かった was [x] 体が弱くなかった was not [x] Te-form, Continuative 体が弱くて is [x] and... 体が弱くなくて is not [x] and... Provisional 体が弱ければ if it is [x] 体が弱くなければ if it is not [x] Conditional 体が弱かったら when/if it is [x] 体が弱くなかったら when/if it is not [x] Adverbial 体が弱く [x]-ly Noun form 体が弱さ [x]-ness