①. 以x/s/sh/ch结尾的名词,加es box-boxes , bus-buses , wish-wishes , watch-watches
②. 以辅音+y结尾的名词,把y变i加es country-countries , city-cities ,baby-babies ,story-stories
③. 以元音+y结尾的名词,加s boy-boys ,toy-toys ,holiday-holidays
④. 以字母o结尾的名词,有生命的+es,无生命的+s
i. 有生命的:黑人英雄爱吃西红柿和土豆 negro-negroes , hero-heroes , potato-potatoes ,tomato-tomatoes
ii. 无生命的:photo-photos , paion-paions , zoo-zoos , radio -radios
⑤. 以f/fe结尾的名词,f/fe变ve,加s
妻子拿刀去杀狼, wife-wives , knif-knives , wolf-wolves
半片树叶遮目光, half-halves , leaf-leaves
特殊:roof-roofs , proof-proofs , belief-beliefs