Unit3名词单数变复数.ppt

Welcome!,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.,-What are those?,-Whats that?,-Its an English book.,-They are English books.,backpacks,watches,oranges,pens,-Whatre these?-Theyre.,maps,cases,keys,-Whatre those?-Theyre.,单数,复数,可数名词,如何变化？,规则变化,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.,name,pen,card,ruler,names,pens,cards,rulers,box,2.以s,x,ch,sh等结尾的名词，在词尾加-es构成复数形式。,boxes,class,classes,watch,watches,brush,brushes,2.,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 土豆炖西红柿。,Sum up:,1.一般情况下,直接在名词词尾加-s.,2.以s,x,sh,ch结尾的名词,在词尾加-es.,3.以辅音字母加y结尾的名词，要变y为i再加-es.,5.以f或 fe结尾的名词，先将f或 fe变为v,再加-es.,6.以o结尾的名词,表示无生命事物的名词加-s,表示有生命事物的名词加-es。,4.以“元音字母+y”结尾的名词，直接在词尾加-s.,给下列可数名词加复数,bird-card-lady-orange-ruler-photo-friend-boy-watch-girl-case-cat-wife-tree-key-bed-hero-family-dictionary-question-leaf-party-cup-,birds,ladies,oranges,rulers,cats,boys,girls,cases,wives,watches,trees,keys,questions,beds,heroes,friends,families,dictionaries,photos,cards,leaves,parties,cups,this that I you he/she/it am/is,these,those,we,you,they,are,单数 复数,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?,复数句子变单数句子 These are dictionaries.单数一般疑问句,并作肯定回答划线提问,This is a dictionary.,Are these dictionaries?Yes,they are.,What are these?,Thank you!,