英语语法名词单数变复数ppt课件.ppt

名词,名词,可数名词,不可数名词,可数名词：可数名词是指能以数目来计算，可以分成个体的人 或东西；因此它有复数形式 如 mapmaps ，boyboys ，horsehorses,不可数名词：不可数名词是指不能以数目来计算，不可以分成个 体的概念、状态、品质、感情或表示物质材料的东 西；它一般没有复数形式，只有单数形式，它的前 面不能用不定冠词a / an。抽象名词, 物质名词和专 有名词一般是不可数名词 如 water，milk,名词单数变复数,Whats this in English?,Its an apple.,What are these?,They are two apples.,-What are these?,-Whats this?,-Its a pen.,-They are pens.,backpacks,watches,oranges,pens,-Whatre these ?-Theyre .,1.一般情况下，直接在词尾加-s构成复数形式。,car,backpack,cars,backpacks,book,books,1.,bus,buses,foxes,dishes,3. 以“辅音字母+y”结尾的名词，应改y为i，再加-es。,family,families,comedies,3.,4. 以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式 。,boy,boys,day,days,4.,key,cities,strawberries,keys,5. 以f或fe结尾的名词，先将f或fe变成v，再加-es构成复数形式。,knife,knives,half,halves,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。,5.,wives,leaves,wolves,roofs,roof,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。,巧记：,6. 以o结尾的名词，有的加-s, 有的加-es构成复数形式。,photo,photos,heroes,tomatoes,zoos,6.,以o结尾的名词,表示无生命事物的名词，词尾加-s,表示有生命事物的名词，词尾加-es。,加-es的名词有: potato, tomato, hero,巧记:英雄爱吃 土豆番茄,名词单数变复数后s / es 的读音1.在清辅音后读 / s /2.在元音和浊辅音后读 / z /3.在/ s / / z / / / / / t / / d /后 读 / iz /4.在/ t /后读/ ts /，在 / d /后读 / dz /,desks maps,brothers pens,classes, watches, oranges,cats, friends,不规则变化,A元音发生变化。如：man-men，woman-women，foot-feet， tooth-teeth，mouse-miceB词尾发生变化。如：child-childrenC单、复数同形。如：fish-fish，Japanese-Japanese， Chinese-Chinese，sheep-sheep,pen desk key box knife card orange boy friend parent mother father sister brother son daughter cousin family child man pencil case sheep,s,s,s,s,es,knives,s,s,s,s,s,s,s,s,s,s,s,families,children,men,s,sheep,句子单数变复数This is a book. That is an eraser.It is a red apple. I am a boy.He / She is a teacher.Whats this ?,These are books.Those are erasers.They are red apples.We are boys.They are teachers.Whatre these ?,this that I you he / she / it am / is ,these,those,we,you,they,are,单数 复数,