名词单数变复数口诀•(一)规则变化•名词单数变复数，直接加-s 占多数；•book-books; pen-pens; apple-apples•s, x, z, ch, sh 来结尾，直接加上-es；•dress-dresses; box-boxes; buzz-buzzes; watch-watches; brush-brushes词尾是f 或fe，加-s 之前先变ve；记住10个把f或fe变成v再加es的单词；Wife life knife leaf 树叶thief half self shelf架子loaf面包wolf狼但是，roof-roofs屋顶，除外leaf-leaves; wife-wives; knife-knives辅音+ y 在词尾，把y 变i 再加-es；•study-studies; baby-babies; city-cities元音+y在词尾, 只加s就足够•boy – boys ; day – days; monkey – monkeys•词尾字母若是o，常用三个已足够，要加-es 请记好，hero, tomato, potato。
•美国黑人和英雄爱吃土豆和西红柿。
辅音+o 词尾+es 元音+o 词尾+s•negro-negroes; hero-heroes; potato-potatoes; tomato-tomatoes•其余o结尾的词加s, photo-photos; piano-pianos•••(二) 不规则变化•男人女人a 变e，鹅足牙oo 变ee；•man-men; woman-women; goose-geese; foot-feet; tooth-teeth•老鼠虱子也好记，ous 变ic；•mouse-mice; louse-lice•孩子加上ren，鱼鹿绵羊不用变•child-children; fish; deer; sheep•this---these(这些)•that -- those(那些)⑶单复数同形：people Chinese Japanese fish deer鹿sheep 绵羊⑷某国人的复数：Chinese Japanese 后面不加sEnglishman Frenchman 把man变为men其他各国人以an,ian结尾的均直接加s,如AmericansGerman 除外，German-GermansIII. 名词的所有格：名词在句中表示所有关系的语法形式叫做名词所有格。
所有格分两种：一是名词词尾加’s 构成，二是由介词of加名词构成。
前者多表示有生命的东西，后者多表示无生命的东西。
3. of所有格的用法：用于无生命的东西：the legs of the chair, the cover of the book用于有生命的东西，尤其是有较长定语时：the classrooms of the first-year students用于名词化的词：the struggle of the oppressed名词练习1. The ____ of the room were covered with ____.A. roofs, leafsB. roofs, leavesC. rooves, leafsD. rooves, leaves2. There are three ____ in our factory.A. woman doctorsB. women doctorsC. woman doctorD. women doctor3. Which do you prefer ____ or ____?A. potatos, tomatosB. potatos, tomatoesC. potatoes, tomatosD. potatoes, tomatoes5. The ant has two ____. A. stomaches B. stomacks C. stomach D. stomachs6. He doesn’t like ____ for supper. A. chick B. chicken C. chickens D. chicks10. My family raise a lot of ____, including two ____.A. cattle, cowsB. cows, cattleC. cattles, cowsD. cow, cattles15. Two ____, please. A. coffee B. coffees C. cup of coffee D. cups coffee17. ____ knowledge of space develops rapidly. A. M an’s B. Men’s C. Mens’ D. Person’s18.I stayed at ____. A. Xiao Wang’s B. Wang’s home C. the Wangs D. home of Wang19. Sister Carrie works in a ____ factory. A. shoes B. shoses C. shoe D. shoe’s20. Have you ever read ____?A. today newspaperB. newspaper todayC. newspaper of todayD. today’s newspaper21. Two ____ walk didn’t made me tired. A. hour B. hours C. hour’s D. hours’22. The mother over there is ____ mother.A. Julia and MaryB. Julia and Mary’sC. Julia’s and Mary’sD. Julia’s and Mary24. The children are playing ____ on the ____.A. sand, sandB. sands, sandsC. sand, sandsD. sands, sand27. We have no ____ about where she has gone.A. informationB. newsC. messageD. flash28. Food and ____ are daily necessities（需要）for the people.A. clothB. clotheC. clothesD. clothing45. I saw many ____ seated in the corner reading something.A. JapaneseB. JapanesesC. of JapaneseD. of Japaneses46. Father went to his doctor for ____ about his heart trouble.A. an adviceB. adviceC. advicesD. the advices47. We are ____ and they are ____.A. Englishmen, GermansB. Englishmen, GermanC. Englishmans, GermansD. Englishmen, Germen48. ____ are made of ____.A. A glass, a glassB. Glasses, glassC. The glass, the glassD. Glasses, glasses49. I’ll h ave to buy ____ trousers. A. a B. two C. a pair of D. a couple of50. There are two ____ in our class. A. Liu B. Lius C. Liu’s D. Lius’53. The laboratory assistant recorded the ____ reactions（反应）.A. mouses’B. miceC. mices’D. mice’s54. This letter was sent by ____.A. my father friendB. my father friend’sC. a friend of my father’sD. a friend of my father58. There are thirty-two ____ in our school.A. woman teacherB. women teacherC. women teachersD. woman teachers名词答案：1~5 BBDDD 6~10 BBCAA 11~15 ABCCB 16~20 DAACD 21~25 DBDCD 26~30 BADBD 31~35 AABDC 36~40 BACCB 41~45 ABDCA 46~50 BABCB 51~55 BDDCD 56~60 ABCCB 61~65 BACAA 66~70 DADCA 71~75 CDCBD 76~80 ADCAD 81~84 ACDA。