Unit 3 Campus Life 名词单数变复数名词单数变复数学习目标：能够掌握可数名词单学习目标：能够掌握可数名词单 数变复数的规则变化。数变复数的规则变化。教学重、难点：能够掌握可数名教学重、难点：能够掌握可数名 词单数变复数的词单数变复数的 规则变化。规则变化。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(喜剧)yyld3.citiesstrawberriescity(城市)strawberry(草莓)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 。boyboysdaydaysoayykeykeys5. 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”(thie)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”(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。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: negro,potato, tomato, hero巧记:黑人英雄爱吃黑人英雄爱吃 土豆炖西红柿土豆炖西红柿。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，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-birdsladiesorangesrulerscatsboysgirlscaseswiveswatchestreeskeysquestionsbedsheroesfriendsfamiliesdictionariesphotoscardsleavespartiescupsthis 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 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 ?