1、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 th
2、ose ? -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,name,pen,card,ruler,names,pens,cards,rulers,练习一,dog- duck- chair- table- band- window- banana- tree-,dogs ducks chairs tables hands windows bananas trees,box,2. 以s, x, ch, sh等结尾的名词， 在词尾加-es构成复数形式。
3、,boxes,class,classes,watch,watches,brush,brushes,bus,buses,foxes,dishes,练习二,glass- box- brush- match- class- bus- watch-,glasses boxes brushes matches classes buses watches,综合练习一,glass- desk- school- box- brush- hen- match- class- bus- eye- watch-,glasses desks schools boxes brushes hens matches cla
4、sses buses eyes watches,3. 以“辅音字母+y”结尾的名词，应改y为i，再加-es。,family,families,comedies,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,key,cities,strawberries,keys,练习三,city- day - boy - family - key- strawberry - baby -,cities days boys families keys strawberries babies,综合练习二,strawberry key- glass - b
5、us - boy - eye - watch - city - school -,strawberries keys glasses buses boys eyes watches cities schools,box - baby- family- brush- match- class- desk- hen- day -,boxes babies families brushes matches classes desks hens days,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
6、“妻子”(wife)用“刀子”(knife)和 “树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。,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)。,巧记一：,妻子持刀去宰狼，小偷吓得发了慌； 躲在架后保己命，半片树叶遮目光。 按：wife（妻子），knife（小刀），wolf（狼），thief（小偷），shelf（架子），self（自己），life（生命），half（一半），leaf（树叶）。 由self构成的复合词，其变化与s
7、elf相同（如myselfourselves；yourselfyourselves；himself，herself，itselfthemselves）。,巧记二：,练习四,wife- knife- wolf- thief- shelf- self- life- half- leaf-,wives knives wolves thieves shelves selves lives halves leaves,综合练习三,wife- key- glass- knife- boy- eye- watch- city- school-,wives keys glasses buses boys ey
8、es watches cities schools,box- baby- family- brush- match- class- desk- hen- day-,boxes babies families brushes matches classes desks hens days,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,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。
9、,练习四,piano- zoo- potato- photo- tomato- radio-,pianos zoos potatoes photos tomatoes radios,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
10、-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,综合练习
11、三,families knives books beds wolves buses shelves zoos potatoes cities photos,leaf piano box tomato brush watch bag cat radio boy strawberry,leaves pianos boxes tomatoes brushes watches bags cats radios boys strawberries,family knife book bed wolf bus shelf zoo potato city photo,不规则名词复数变化一,deer- she
12、ep- foot- tooth- goose - fish- Chinese- Japanese-,deer sheep feet teeth geese fish Chinese Japanese,不规则名词复数变化二,man- woman- policeman- mouse- child-,men women policemen mice children,this that I you he / she / it am / is ,these,those,we,you,they,are,单数 复数,不规则名词复数变化三,this- that - I - me - you - he/she
13、/it/- him/her/it- am/is-,these those we us you they them are,综合练习三,me- Chinese- tooth- mouse- fish- you- she-,watch- him- potato- shelf- child- woman- bag-,bus- box- photo- sheep- this- that- I-,us Chineseteeth mice fish you they,watches them potatoes shelves children women bags,buses boxes photos s
14、heep- these those we,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!,
