这句话是谁说的呢?随便给你加一个说话者,希望能帮到你：
Her mother said that it would be better if she does her own work.但是书上有这样一句话 she said it was much better if she did her own work. it was much better if she did her own work,主句和从句都是过去式，主句不是过去将来时主句中或许理解为虚拟语气更准确一些，而不是过去式