名词单数变复数专练完整版本

.,Welcome!,.,名词单数变复数,.,WhatsthisinEnglish?,Itsanapple.,Whatarethese?,Theyaretwoapples.,.,-Whatarethese?,-Whatsthis?,-Itsapen.,-Theyarepens.,.,-Whatarethose?,-Whatsthat?,-ItsanEnglishbook.,-TheyareEnglishbooks.,.,backpacks,watches,oranges,pens,-Whatrethese?-Theyre.,.,maps,cases,keys,-Whatrethose?-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。,.,Sumup:,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,.,thisthatIyouhe/she/itam/is,these,those,we,you,they,are,单数复数,.,句子单数变复数Thisisabook.Thatisaneraser.Itisaredapple.Iamaboy.He/Sheisateacher.Whatsthis?,Thesearebooks.Thoseareerasers.Theyareredapples.Weareboys.Theyareteachers.Whatrethese?,.,复数句子变单数句子Thesearedictionaries.单