这里的easy是修饰language的,不是修饰learn.句子本应该是个定语从句.The only language which is easyto learn is the mother language.唯一简单学的语言就是母语.这里的easy是修饰”语言“,表示语言简单.所以用形...���������Ҫ�Ǹij���easily ����ô˵The only language you can easily learn is the mother language.