三年级英语知识总结：名词的单复数一、名词可以分为：1.可数名词。
有单复数。
cat-cats,boy-boys2.不可数名词。
没有单复数，一律看作单数。
3.a/an的用法以元音音标（或音素）开头的用an。
例：an apple,an orange,an elephant以辅音音标（或音素）开头的用a。
例：a dog,a boy,a book注意：我们看的是音标（或音素），而不是元音字母。
练习：选择a或an或不填（用/表示）______pen______bag______apple______big apple______banana______orange______oranges______orange pen答案：a,a,an,a,a,an,/,an二、重点：可数名词的变化规则：1.一般在词尾加s。
如：books，bags，fruits。
2.以s、x、ch、sh结尾的名词加es。
如：class----classes,box----boxes3.以辅音字母加y结尾的名词，变y为i再加es，读[iz]。
如：baby——babies4.以f、fe结尾的名词变f、fe为ves。
如：wolf狼——wolveswife（妻子）—wives5.以o结尾的名词，有生命的加es,没生命的加s。
如：有生命tomato-tomatoes,potato-potatoes,hero-heros,mango-mangoes 无生命photo-photos zoo-zoos6.名词复数的不规则变化：man—men男人woman—women女人tooth—teeth牙齿foot—feet脚mouse—mice老鼠child—children孩子7.单复同形的名词有：Chinese中国人Japanese日本人sheep绵羊deer鹿fish鱼people人注意：fish①当一条鱼讲时，单复数同形，如three fish.②强调鱼的种类时，要加es如：all kinds of fishes各种各样的鱼③当鱼肉讲时，不可数。
8.不可数名词，没有单复数water(水)milk(牛奶)tea(茶)rice(米饭)orange（橙汁）juice（果汁）bread（面包）hair（头发）名词单复数练习一、写出下列名词的复数形式1、orange______2、class______3、monkey______4、piano______5、child______6、shelf______7、bed______8、country______9、family______10、toy______11、foot______12、radio______ 13、photo______14、tomato______15、woman______16、knife______ 17、sheep______18、ship______19、dish______20、mouse______ 21、tooth______22、leaf______二、单项选择()1.The______in our yard are very beautiful.A.clothB.waterC.flowers()2.Tom is one of the Chinese_____in our school.A.boyB.boysC.boies()3.A cat has four____,doesn't it?A.footsB.feetC.feets()4.There are three____and five_____in the room.A.American,JapaneseB.Americans,JapaneseC.American,Japaneses ()5.Can you see nine____in the picture?A.fishB.bookC.horse()6.The_____has two______.A.boy;watchB.boy;watchesC.boys;watch()7.The_____are flying back to their country.A.GermanyB.GermanysC.Germans()8.The girl brushes her_____every day before he goes to bed.A.toothsB.teethC.teeths()9.I saw many_____in the street.A.peoplesB.peopleC.people’s()10.The green sweater is his_________.A.brotherB.brothersC.brother’s()11.They come from different______A.countryB.countriesC.acountryD.countrys()12.How many______do you see in the picture?A.tomatosB.tomatoesC.tomatoD.the tomato()13.They are______.A.woman teachersB.women teachersC.women teacherD.woman teacher()14.Would you like_______,please?A.two glass of waterB.two glasses of waterC.two glass of watersD.two glasses of waters()15.Most of______live in_______.A.Germans,GermanB.German,GermenC.Germen,GermanyD.Germans,Germany()16.Here are some______in these_______.A.knifes pencil-boxesB.knives pencils-boxC.knives pencil-boxD.knives pencils-boxes()17.______like______by air.A.Greens,travelingB.The Green,travelingC.The Greens,travelD.The Greens,travelling()18.I wonder why______are interested inaction films(武打片).A.the peopleB.peopleC.peoplesD.the peoples()19.There is no______in the plate.A.applesB.orangesC.riceD.eggs()20.My uncle has three_______.A.childB.childsC.childrenD.childrens三、填入所给名词的正确形式1.I have two_______(knife)2.There are many_______here.(box)3.There are many_______on the road.(bus)4.A few_______are drawing on the wall.(boy)5.The_______are playing football now.(child)6.Please take two_______for me.(photo)7.I like the red_______.(tomato)8.Would you please clean your_______now?(tooth)9.Do you want some_______?(milk)10.There are ten______________in our school.(woman teacher)参考答案：一、1.oranges2.classes3.monkeys4.pianos5.children6.shelves7.beds8.countries9.families10.toys11.feet12.radios13.photos14.tomatoes15.women16.knives17.sheep18.ships19.dishes20.mice21.teeth22.leaves二、1.C2.B3.B4.B5.A6.B7.C8.B9.B10.C11.B12.B13.B14.B15. D16.A17.D18.B19.C20.C三、1.knives2.boxes3.buses4.boys5.children6.photos7.tomatoes8. teethk10.women teachers。