教资小学最全英语语法

③以辅音字母+y结尾,变y为i,再加es,读/z/e.g.baby-babies,library-libraries,factory-factories④以f或fe结尾,变f或fe为v,再加es,读/vz/e.g.thief-thieves,knife-knives⑤以o结尾,表示无生命的物体时加s,表示有生命的物体时,加es,都读/z/e.g.photo-photos,piano-pianos...