英语：名词单数变复数课件.ppt

名词的单数与复数,1.名词？名词是表示人与事物名称的词，它既可以表示具体的东西，也可以表示抽象的东西。2.名词按数分为：可数名词（单数和复数的相互转化）不可数名词（列出你知道的不可数名词）,常见的不可数名词,food-ricebreadmeatfishdrink-waterjuicecoffeeteamilkothers-advicemoneypeopleworkhelpglasspaperclothsandsoaphopeworkweatherinformationnews注意：1.不可数名词一般没有复数形式，只有单数形式。2.不可数名词前面不能用不定冠词a/an。,-Whatarethese?,-Whatsthis?,-Itsapen.,-Theyarepens.,-Whatarethose?,-Whatsthat?,-ItsanEnglishbook.,-TheyareEnglishbooks.,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,basketball,cars,basketballs,book,books,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.,3.以“辅音字母+y”结尾的名词，变“y”为“i”，再加-es构成复数形式。,citycitiesfamilyfamiliespartyparties,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,.,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,wolf,wolves,.,注意：roofroofs,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,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.,7.单数复数的不规则变化例词：manmenwomanwomen,childchildrenfootfeet,8、单复数同形，保持原音。例词：fishfish,sheepsheepcattlecattledeerdeer,给下列可数名词加复数,bird-card-lady-orange-ruler-photo-lady-boy-leaf-mouse-tooth-cat-wife-shelf-key-bus-hero-Chinese-dictionary-fox-girl-zero-party-cup-,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?,Pratice,1.Weneedmore_(people)toattendit.2.Thereissome_(food)inthebasket.3._(knife)areusedforcuttingthings.4.Iseeyouhaveafewwhite_(hair)5.Thisdresscostme20_(dollar),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/