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1、Lesson 12 How many are there ?1pencil2This is one pencil.3 pencils4 These are many pencils .5chair6This is a chair .7chairs 8These are many chairs . 9名词单数变复数的规则名词单数变复数的规则1：一般直接加s10box11 This is a box .12boxes13These are many boxes .14bus15This is a bus .16buses17These are three buses.18名词单数变复数的规则名词单
2、数变复数的规则2： 以s,x,sh,ch结尾的可数名词的复数形式通常在其后加es.如class,bus,fox,dish,watch等19tomato 20This is a tomato .21tomatoes22 These are many tomatoes.23potato24 This is a potato .25potatoes26These are many potatoes.27photophoto28photoThis is a photo.29photos30These are many photos.31名词单数变复数的规则名词单数变复数的规则3：以o结尾的名词，有生命
3、的加es，无生命的加s但个别有生命的却加s如：1.negro(黑人)，hero（英雄），potato(土豆)，tomato（西红柿）后加es；2.radio(收音机)photo(照片)后加s；3.特殊的kangaroo后加s .32 man33These are men34 woman35These are women36This is a child37These are children38名词单数变复数的规则名词单数变复数的规则4：有一些单词变复数时改变其中的字母或词尾发生变化，如manmen womanwomen footfeet tooth（牙）teethgoosegus（鹅）gee
4、sechildchildren oxks（公牛）oxen等 39知识延伸：知识延伸：名词单数变复数的规则名词单数变复数的规则5：1.以辅音y结尾的名词，要把y变成i，再加es . 如：babybabies . familyfamilies .2.以元音y结尾的名词，要直接加s如：boyboys .3.以 f 或 fe结尾的，要去掉f或fe ,再加ves . 如：wolfwolves , leafleaves ，wifewives， knifeknives. 4.单复数同形。 如：sheepsheep(绵羊), deerdeer（小鹿）, people-people,ChineseChinese
5、等405.fish很特殊，fish用作可数名词指“鱼的条数”时单数和复数形式相同（two fish两条鱼），指“鱼的种类”时复数形式才为fishes（two fishes两种鱼）；fish用作不可数名词时无复数形式，意为“鱼肉”，Help yourself to some fish随便吃些鱼。）41一、看图写单词看图写单词. 1. These are _. 2. There are five _. 3. Here are many _. 4. These are _. 5. Here are some _. 6. Here are three _. 7. These are _.childre
6、npencilsdresseswomenstampsbusesmen42二改错：二改错：1This is one pencils . 2. Look at these woman. 3 . There are five childs . 4. There is many dishes. 5. How much pencils are there? 6. How many book do you have? 7. The students is reading books now. (pencil)(women )(children)(are)(many)(books)(are)43三改写句子：
7、三改写句子：1This is a pencil. (复数) 2. Here is a dish . (复数) 3. These are some bedrooms . (单数) 4. Here are two women . (单数)These are pencils.Here are dishes.This is a bedroom.Here is a woman.44小结：名词单数变复数的规则小结：名词单数变复数的规则1.1.一般直接加一般直接加s s2.2.以以s,x,sh,chs,x,sh,ch结尾的可数名词的复数形式通结尾的可数名词的复数形式通常在其后加常在其后加eses. .如如c
8、lass,bus,fox,dish,watchclass,bus,fox,dish,watch等。等。3.3.以以o o结尾的名词，有生命的加结尾的名词，有生命的加eses，无生命的，无生命的加加s s但个别有生命的却加但个别有生命的却加s s如：如：（1 1）.negro(.negro(黑人黑人) )，herohero（英雄），（英雄）， potato(potato(土豆土豆) )，tomatotomato（西红柿）后加（西红柿）后加eses；（2 2）.radio(.radio(收音机收音机)photo()photo(照片照片) )后加后加s s；（3 3）. .特殊的特殊的kangaro
9、okangaroo后加后加s s . .454.4.以辅音以辅音y y结尾的名词，要把结尾的名词，要把y y变成变成i i，再加，再加eses. . 如：如：babybabies babybabies ，familyfamilies .familyfamilies .5.5.以元音以元音y y结尾的名词，要直接加结尾的名词，要直接加s s 如：如：boyboys .boyboys .6.6.以以f f或或fefe结尾的，要去掉结尾的，要去掉f f或或fe ,fe ,再加再加vesves. . 如：如：wolfwolves , leafleaves wolfwolves , leafleaves
10、 ，wifewifewifewives wifewives ， knifeknivesknifeknives. . 7.7.单复数同形。单复数同形。 如：如：sheepsheep(sheepsheep(绵羊绵羊), deer), deerdeerdeer（小鹿）（小鹿）鹿）鹿）, , people- people-peoplepeople,ChineseChinese,ChineseChinese等。等。468.8.有一些单词变复数时改变其中的字母或词尾发生变化，有一些单词变复数时改变其中的字母或词尾发生变化，如：如：manmen manmen womanwomen womanwomen fo
11、otfeet tooth footfeet tooth（牙）（牙）teethteeth goosegu gooseguss（鹅）（鹅）geesegeese childchildrenchildchildren ox oxksks（公牛）（公牛）oxenoxen等等 9.fish9.fish很特殊：很特殊： fish fish用作可数名词指用作可数名词指“鱼的条数鱼的条数”时单数和复数形式相时单数和复数形式相同（同（two fishtwo fish两条鱼）。两条鱼）。 fish fish指指“鱼的种类鱼的种类”时复数形式才为时复数形式才为fishesfishes（two two fishesfishes两种鱼）。两种鱼）。 fish fish用作不可数名词时无复数形式，意为用作不可数名词时无复数形式，意为“鱼肉鱼肉”，Help yourself to some fishHelp yourself to some fish随便吃些鱼。）随便吃些鱼。）47Thank you!48
