初中英语可数名词单数变复数的方法ppt课件.ppt

,英语课件,名词,1,名词,名词：表示事物名称的词叫名词。,名词分为可数名词和不可数名词。,不可数名词没有复数形式，不能在它后面加-s。可数名词有单复数的变化。,2,常用的不可数名词是肉类和流质类。,例：meat(肉)beef(牛肉)pork(猪肉)chicken(鸡肉)duck（鸭肉）fish(鱼肉),water(水)milk(牛奶)jiuce(果汁)orange(桔子汁)tea(茶)coffee(咖啡),bread(面包)rice(米饭)broccoli(花椰菜),3,1.key-2.dog-3.pen-4.cat-5.book-,一、一般情况在词尾加-s。,6.horse-7.eraser-8.banana-9.desk-10.orange-,keys,dogs,pens,cats,books,horses,erasers,bananas,desks,oranges,可数名词有单复数的变化，其规则是：,4,二、以s、x、ch、sh、结尾的加-es。,1.bus-2.box-3.class-4.pencil-box-5.glass-6.fox-,7.sunglass-8.fax-9.watch-10.beach11.sandwich-12.wish-,13.dish-,buses,boxes,classes,pencil-boxes,glasses,foxes,sunglasses,faxes,watches,beaches,sandwiches,wishes,dishes,5,三、以o结尾的，tomato、potato、hero加-es，其他的加-s。,1.tomato-2.potato-3.hero-4.photo-5.zoo-6.radio-7.piano-8.video-,tomatoes,potatoes,photos,zoos,heroes,radios,pianos,videos,6,四、以辅音字母+y结尾的，变y为i再加-es。,dormitories,1.baby-3.party-5.family-7.story-9.hobby-11.city-13.country-,2.dictionary-4.library-6.charity-8.documentary-10.strawberry-pany-14.dormitory-,babies,dictionaries,parties,libraries,families,charities,stories,documentaries,hobbies,strawberries,cities,companies,countries,7,1.leaf-5.shelf-2.scarf-6.life-3.half-7.wife-4.thief-8.knife-,五、以f、fe、结尾的，变f、fe、为v，再加-es。,leaves,knives,scarves,lives,halves,wives,thieves,shelves,8,六、特殊情况：三人、四动物、两器官。,toothfoot,三人:,manwomanchild,四动物:,sheepdee