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1、名词名词单数单数变变复数复数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.backpackswatchesorangespens-Whatre these?-Theyre .mapscaseskeys-Whatre those?-Theyre .单数
2、复数可数名词如何变化？规则变化不规则变化规则变化规则变化1.一般情况下，直接在词尾加-s构成复数形式。carbackpackcarsbackpacksbookbooks1.namepencardrulernamespenscardsrulersbox2.以s,x,ch,sh等结尾的名词，在词尾加-es构成复数形式。boxesclassclasseswatchwatchesbrushbrushessxshch2.busbusesfoxesfox(狐狸)dish(盘子)dishes3.以“辅音字母+y”结尾的名词，应改y为i，再加-es。familyfamiliescomediescomedy(喜
3、剧)yyld3.4.以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式。boyboysdaydaysoayy4.keycitieskeyscity(城市)boyboys5.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。knifekniveshalfhalves“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。5.wivesleaveswolveswife(妻子)leaf(树叶)wolf(狼)roof(屋顶)roofsroof“小偷”(thief)的“妻子”(wife)用“刀子”(k
4、nife)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。photophotosheroestomatoeszooszoo(动物园)tomato(西红柿)hero(英雄)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,negro巧记:英雄黑人爱吃英雄黑人爱吃 土豆和西红柿土豆和西红柿。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
5、，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.(二二)不规则变化不规则变化:3.单复数同形单复数同形(不变不变):sheep(绵羊绵羊)deer(鹿鹿)fish(鱼鱼)1.man,womanChinese(中国人中国人)Japanese(日本人日本人)4.oo ee：foot(脚脚)tooth(牙齿牙齿)goose(鹅鹅)2.child（孩子）孩子）（男人，妇女）男人，妇女）men,womenchildren名词单数变复数后名
6、词单数变复数后s/es 的读音的读音1.在清辅音后读在清辅音后读/s/2.在元音和浊辅音后读在元音和浊辅音后读/z/3.在在/s/z/t /d /后后 读读/iz/4.在在/t/后读后读/ts/，在在/d/后读后读/dz/desks mapsbrothers pensclasses,watches,orangescats,friends 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
7、-party-cup-birdsladiesorangesrulerscatsboysgirlscaseswiveswatchestreeskeysquestionsbedsheroesfriendsfamiliesdictionariesphotoscardsleavespartiescupsbirdscardspen desk key box knife card orange boy friend parent mother father sister brother son daughter cousin family child man pencil case sheepsssses
8、knivessssssssssssfamilieschildrenmenssheepthis that I you he/she/it am/is thesethoseweyoutheyare 单数单数 复数复数句子单数变复数句子单数变复数1.This is a book.2.That is an eraser.3.It is a red apple.4.I am a boy.5.He/She is a teacher.6.Whats this?These are books.Those are erasers.They are red apples.We are boys.They are
9、teachers.Whatre these?复数句子变单数句子复数句子变单数句子 These are These are dictionariesdictionaries.单数单数一般疑问句一般疑问句,并作肯定回答并作肯定回答划线提问划线提问 This is a dictionary.Are these dictionaries?Yes,they are.What are these?this that I you he/she/it am/is thesethoseweyoutheyare 单数单数 复数复数一、写出下列单词的复数一、写出下列单词的复数1.I-2.am-3.he 2.4.pe
10、ncil-5.watch-3.6.dictionary-4.7.man-8.it-5.9.parent-10.boy wearetheypencils watchesdictionaries men they parentsboys二、句型转换二、句型转换1.This is my mother.1）变否定句）变否定句 2）变一般疑问句，并作肯定回答）变一般疑问句，并作肯定回答This is not my mother.Is this your mother?Yes,it/she is.2.That is a car.1）变否定句）变否定句 2）划线提问）划线提问3)变复数句变复数句That i
11、s not a car.Whats that?Those are cars.3.Thats an English dictionary.1）变否定句）变否定句 2）变一般疑问句，并作否定回答）变一般疑问句，并作否定回答Thats not an English dictionary.Is that an English dictionary?No,it isnt.4.Her family names Smith.5.My jacket is blue.6.is,that,brother,my,Dave 组词成句组词成句划线提问划线提问划线提问划线提问Whats her family name?W
12、hat color is your jacket?That is my brother,Dave.句型转换句型转换1.What1.Whats this?s this?复数复数 Whatre these?2.He2.Hes a Chinese boy.s a Chinese boy.复数复数Theyre Chinese boys.3.This is a bike.3.This is a bike.否定句否定句复数句复数句一般疑问句，并作肯定回答一般疑问句，并作肯定回答This is not a bike.These are bikes.Is this a bike?Yes,it is.4.That is my brother.4.That is my brother.否定句否定句一般疑问句，并作否定回答一般疑问句，并作否定回答That is not my brother.Is that your brother?No,it/he isnt.5.These are 5.These are dictionariesdictionaries.单数单数一般疑问句一般疑问句,并作肯定回答并作肯定回答划线提问划线提问 This is a dictionary.Are these dictionaries?Yes,they are.What are these?