英语语法-名词单数变复数.ppt

名词,名词,可数名词,不可数名词,可数名词：可数名词是指能以数目来计算，可以分成个体的人或东西；因此它有复数形式如mapmaps，boyboys，horsehorses,不可数名词：不可数名词是指不能以数目来计算，不可以分成个体的概念、状态、品质、感情或表示物质材料的东西；它一般没有复数形式，只有单数形式，它的前面不能用不定冠词a/an。抽象名词,物质名词和专有名词一般是不可数名词如water，milk,名词单数变复数,WhatsthisinEnglish?,Itsanapple.,Whatarethese?,Theyaretwoapples.,-Whatarethese?,-Whatsthis?,-Itsapen.,-Theyarepens.,backpacks,watches,oranges,pens,-Whatrethese?-Theyre.,1.一般情况下，直接在词尾加-s构成复数形式。,car,backpack,cars,backpacks,book,books,1.,bus,buses,foxes,dishes,3.以“辅音字母+y”结尾的名词，应改y为i，再加-es。,family,families,comedies,3.,4.以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式。,boy,boys,day,days,4.,key,cities,strawberries,keys,5.以f或fe结尾的名词，先将f或fe变成v，再加-es构成复数形式。,knife,knives,half,halves,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。,5.,wives,leaves,wolves,roofs,roof,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。,巧记：,6.以o结尾的名词，有的加-s,有的加-es构成复数形式。,photo,photos,heroes,tomatoes,zoos,6.,以o结尾的名词,表示无生命事物的名词，词尾加-s,表示有生命事物的名词，词尾加-es。,加-es的名词有:potato,tomato,hero,巧记:英雄爱吃土豆番茄,名词单数变复数后s/es的读音1.在清辅音后读/s/2.在元音和浊辅音后读/z/3.在/s/z/t/d/后读/iz/4.在/t/后读/ts/，在/d/后读/dz/,desksmaps,brotherspens,classes,watches,oranges,cats,friends,不规则变化,A元音发生变化。如：man-men，woman-women，foot-feet，tooth-teeth，mouse-miceB词尾发生变化。如：child-childrenC单、复数同形。如：fish-fish，Japanese-Japanese，Chinese-Chinese，sheep-sheep,pendeskkeyboxknifecardorangeboyfriendparentmotherfathersisterbrothersondaughtercousinfamilychildmanpencilcasesheep,s,s,s,s,es,knives,s,s,s,s,s,s,s,s,s,s,s,families,children,men,s,sheep,句子单数变复数Thisisabook.Thatisaneraser.Itisaredapple.Iamaboy.He/Sheisateacher.Whatsthis?,Thesearebooks.Thoseareerasers.Theyareredapples.Weareboys.They