1.大多数名词直接在词尾加s：school—schools,apple—apples,book—books,desk—desks

　　2.以s、x、sh、ch等结尾的名词,在词尾加es：bus—buses,box—boxes,watch—watches,dish—dishes

　　3.以“辅音字母+y”的名词,把y变i再加es：fly—flies,family—families,baby—babies

　　4.以f/fe结尾的名词,把f/fe变v再加es：knife—knives,life—lives

　　5.以o结尾的名词:有生命的加es:tomato—tomatoes,potato—potatoes,Negro—Negroes,hero—heroes,

　　无生命的加s:photo—photos,radio—radios,zoo—zoos,piano--pianos

　　不规则变化的名词的复数：

　　1.单复数同形：fish,deer,sheep,Chinese,Japanese,

　　2.特殊变化：child—children,ox—oxen,man—men,woman—women,mouse—mice,foot—feet,tooth—teeth,goose--geese