1、Lesson 12 How many are there ?,pencil,This is one pencil.,pencils,These are many pencils .,chair,This is a chair .,chairs,These are many chairs .,名词单数变复数的规则1：,一般直接加s,box,This is a box .,boxes,These are many boxes .,bus,This is a bus .,buses,These are three buses.,名词单数变复数的规则2：,以s,x,sh,ch结尾的可数名词的复数形式通
2、常在其后加es.如class,bus,fox,dish,watch等,tomato,This is a tomato .,tomatoes,These are many tomatoes.,potato,This is a potato .,potatoes,These are many potatoes.,photo,photo,photo,This is a photo.,photos,These are many photos.,名词单数变复数的规则3：,以o结尾的名词，有生命的加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)，t
3、omato（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 .,man,These are men,woman,These are women,This is a child,These are children,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）teeth goosegus（鹅）geese childchildren oxks（公牛）oxen等,知识延伸： 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
4、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等,5.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
5、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。）,一、,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 _.,children,pencils,dresses,women,stamps,buses,men,二改错：1This is one pencils . 2. Look at these woman
6、. 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),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. H
7、ere are two women . (单数),These are pencils.,Here are dishes.,This is a bedroom.,Here is a woman.,小结：名词单数变复数的规则,1.一般直接加s 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。 3.以o结尾的名词，有生命的加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
8、）.特殊的kangaroo后加s .,4.以辅音y结尾的名词，要把y变成i，再加es.如：babybabies ，familyfamilies . 5.以元音y结尾的名词，要直接加s如：boyboys . 6.以f或fe结尾的，要去掉f或fe ,再加ves.如：wolfwolves , leafleaves ，wifewifewives ， knifeknives. 7.单复数同形。如：sheepsheep(绵羊), deerdeer（小鹿）鹿）, people-people,ChineseChinese等。,8.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）geesechildchildren oxks（公牛）oxen等 9.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）。fish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。）,
