名詞單數(shù)變復(fù)數(shù)專練.ppt

Welcome !,名詞單數(shù)變復(fù)數(shù),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 .,單數(shù),復(fù)數(shù),可數(shù)名詞,如 何 變 化？,規(guī)則變化,1.一般情況下，直接在詞尾加-s構(gòu)成復(fù)數(shù)形式。,car,backpack,cars,backpacks,book,books,1.,name,pen,card,ruler,names,pens,cards,rulers,box,2. 以s, x, ch, sh等結(jié)尾的名詞， 在詞尾加-es構(gòu)成復(fù)數(shù)形式。,boxes,class,classes,watch,watches,brush,brushes,2.,bus,buses,foxes,dishes,3. 以“輔音字母+y”結(jié)尾的名詞，應(yīng)改y為i，再加-es。,family,families,comedies,3.,4. 以“元音字母+y”結(jié)尾的名詞，直接在詞尾加-s構(gòu)成復(fù)數(shù)形式 。,boy,boys,day,days,4.,key,cities,strawberries,keys,5. 以f或fe結(jié)尾的名詞，先將f或fe變成v，再加-es構(gòu)成復(fù)數(shù)形式。,knife,knives,half,halves,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和 “樹葉”(leaf)把“狼”(wolf)劈成兩“半”(half)。,5.,wives,leaves,wolves,roofs,roof,“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“樹葉”(leaf) 把“狼”(wolf)劈成兩“半”(half)。,巧記：,6. 以o結(jié)尾的名詞，有的加-s, 有的加-es構(gòu)成復(fù)數(shù)形式。,photo,photos,heroes,tomatoes,zoos,6.,以o結(jié)尾的名詞, 表示無(wú)生命事物的名詞，詞尾加-s, 表示有生命事物的名詞，詞尾加-es。,加-es的名詞有: potato, tomato, hero,巧記: 英雄愛吃 土豆燉西紅柿。,Sum up:,1.一般情況下,直接在名詞詞尾加-s.,2.以s,x,sh,ch結(jié)尾的名詞,在詞尾加-es.,3.以輔音字母加y結(jié)尾的名詞，要變y為i再加-es.,5.以f或 fe結(jié)尾的名詞，先將f或 fe變?yōu)関,再加-es.,6.以o結(jié)尾的名詞,表示無(wú)生命事物的名詞加-s, 表示有生命事物的名詞加-es。,4.以“元音字母+y”結(jié)尾的名詞，直接在詞尾加-s .,給下列可數(shù)名詞加復(fù)數(shù),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,單數(shù) 復(fù)數(shù),句子單數(shù)變復(fù)數(shù) 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 ?,復(fù)數(shù)句子變單數(shù)句子 These are dictionaries. 單數(shù) 一般疑問(wèn)句