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名词复数变化规则变化1)一般情况加s例如：map-mapsboy-boysgirl-girlspen-pensbag-bagscar-cars（清辅音后读/s/，浊辅音和元音后读/z/，/s/、/z/、/dʒ/等音后发/iz/)2)以s,sh,ch,x结尾加es，读/iz/。例如：bus-buseswatch-watchesbox-boxesbrush-brushes3)以辅音字母+y结尾，变y为i再加es，读/iz/。例如：baby---babiescity-citiescountry-countries4)以y结尾的专有名词或元音字母+y结尾的名词变复数时，直接加s，读/z/monkey---monkeysholiday---holidaysMary---Marys(专有名词)5）以辅音字母+o结尾的，加es，读/iz/。例如：potato-potatoestomato-tomatoeshero-heroesNegro-Negroes7)有些以辅音+o结尾的名词，直接加s，读/z/.例如：piano-pianosphoto-photosalto-altossoprano-sopranosquarto-quartos(四开本)8）有些以f或fe结尾的，把f或fe变ve加s，例如：leaf-leavesshelf-shelves不规则变化1）child---childrenfoot---feettooth---teethmouse---miceman---menwoman---women注意：由一个词加man或woman构成的合成词，其复数形式也是-men和-women，如anEnglishman，twoEnglishmen。但German不是合成词，故复数形式为Germans；Bowman是姓，其复数是theBowmans。2）单复同形，如deer，sheep，fish，Chinese，Japanese，li，jin，yuan，twoli，threemu，fourjin等。但除人民币的元、角、分外，美元、英镑、法郎等都有复数形式。如：adollar,twodollars;ameter,twometers。3）集体名词，以单数形式出现，但实为复数。例如：peoplepolicecattle等本身就是复数，不能说apeople，apolice，acattle，但可以说aperson，apoliceman，aheadofcattle.4）以s结尾，仍为单数的名词，如：a.maths，politics，physics等学科名词，一般是不可数名词，为单数。b.news为不可数名词。c.theUnitedStates，theUnitedNations应视为单数。TheUnitedNationswasorganizedin1945.联合国是1945年组建起来的。d.以复数形式出现的书名，剧名，报纸，杂志名，也可视为单数。例如：TheArabianNightsisaveryinterestingstory-book.《一千零一夜》是一本非常有趣的故事书。5）表示由两部分构成的东西，如：glasses（眼镜）trousers,clothes等，若表达具体数目，要借助数量词pair（对，双）;suit（套）;apairofglasses;twopairsoftrousers等。6）另外还有一些名词，其复数形式有时可表示特别意思，如：goods货物，waters水域，fishes（各种）鱼。7）有些表示生物的名词，其复数形式与单数相同。如：fish-fish,sheep-sheep,deer-deer。这类名词还有aircraft,means等不可数名词1）物质名词a.当物质名词转化为个体名词时为可数。比较：Cakeisakindoffood.蛋糕是一种食物。（不可数）Thesecakesaresweet.这些蛋糕很好吃。（可数）b.当物质名词表示该物质的种类时，可数。例如：Thisfactoryproducessteel.（不可数）Weneedvarioussteels.（可数）c.当物质名词表示份数时，可数。例如：Ourcountryisfamousfortea.我国因茶叶而闻名。Twoteas,please.请来两杯茶。2）抽象名词表示具体的事例时也可数。例如：fourfreedoms四大自由thefourmodernizations四个现代化物质名词和抽象名词可以借助单位词表一定的数量，如aglassofwaterapieceofadviceapileofcaolaflashoflighteningaburstoflaughter名词复数练习一、单项选择()1.The__inouryardareverybeautiful.A.clothB.waterC.flowers()2.TomisoneoftheChinese_____inourschool.A.boyB.boysC.boies()3.Acathasfour____,doesn'tit?A.footsB.feetC.feets()4.Therearethree____andfive_____intheroom.A.American,JapaneseBAmericans,JapaneseC.American,Japanese()5.Canyouseenine____inthepicture?A.fishB.bookC.horse()6.The_____hastwo______.A.boy;watchB.boy;watchesC.boys;watch()7.The_____areflyingbacktotheircountry.A.GermanyB.GermanysC.Germans()8.Thegirlbrushesher_____everydaybeforehegoestobed.A.toothsB.teethC.teeths()9.Isawmany_____inthestreet.A.peoplesB.peopleC.people’s()10.Thegreensweaterishis_________.A.brotherB.brothersC.brother’s二、选择填空()1.Theycomefromdifferent______A.countryB.countriesC.acountryD.countrys()2.Howmany______doyouseeinthepicture?A.tomatosB.tomatoesC.tomatoD.thetomato()3.Theyare______.A.womanteachersB.womenteachersC.womenteacherD.womanteacher()4.Wouldyoulike_______,please?A.twoglassofwaterB.twoglassesofwaterC.twoglassofwatersD.twoglassesofwaters()5.Mostof______livein_______.A.Germans,GermanB.German,GermenC.Germen,GermanyD.Germans,Germany()6.Therearesome______inthese_______.A.knifespencil-boxesB.knivespencils-boxC.knivespencil-boxD.knivespencils-boxes()7.______like______byair.A.Greens,travellingB.TheGreen,travelingC.TheGreens,travelD.TheGreens,traveling()8.Iwonderwhy______areinterestedinactionfilms(武打片).A.thepeopleB.peopleC.peoplesD.thepeoples()9.Thereisno______intheplate.A.applesB.orangesC.riceD.eggs()10.Myunclehasthree_______.A.childB.childsC.childrenD.childrens三.填入所给名词的正确形式1.Ihavetwo____________(knife)2.Therearemany___________here.(box)3.Therearemany___________ontheroad.(bus)4.Afew___________aredrawingonthewall.(boy)5.The______________areplayingfootballnow.(child)6.Pleasetaketwo_______________forme.(photo)7.Ilikethered________________.(tomato)8.Wouldyoupleasecleanyour_____________now?(tooth)9.Doyouwantsome_________?(milk)10.Thereareten___________________inourschool.(womanteacher)