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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 .单数复
2、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。carbackpackcarsbackpacksbookbooksnamepencardrulernamespenscardsrulers练习一练习一dog-duck-chair-table-band-window-banana-tree-dogs duckschairstables hands windows bananas treesbox2.以s,x,ch,sh等结尾的名词，在词尾加-es构成复数形式。boxesclassclasseswatchwatchesbrushbrushessxs
3、hchbusbusesfoxesfox(狐狸)dish(盘子)dishes练习二练习二glass-box-brush-match-class-bus-watch-nglasses nboxes nbrushes nmatches nclassesnbusesnwatches综合练习一综合练习一glass-desk-school-box-brush-hen-match-class-bus-eye-watch-nglasses ndesks nschoolsnboxes nbrushes nhensnmatches nclassesnbusesneyesnwatches3.以“辅音字母+y”结尾的
4、名词，应改y为i，再加-es。familyfamiliescomediescomedy(喜剧)yyld4.以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式。boyboysdaydaysoayykeycitiesstrawberrieskeyscity(城市)strawberry(草莓)练习三练习三city-day-boy-family-key-strawberry-baby-ncities ndays nboysnfamilies nkeysnstrawberries nbabies 综合练习二综合练习二strawberry key-glass-bus-boy-eye-watch-c
5、ity-school-nstrawberries nkeysnglasses nbuses nboysneyesnwatchesncities nschoolsnbox-nbaby-nfamily-nbrush-nmatch-nclass-ndesk-nhen-nday-nboxes nbabies nfamilies nbrushes nmatches nclassesndesks nhensndays 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。knifekniveshalfhalves“小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”
6、(leaf)把“狼”(wolf)劈成两“半”(half)。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)。巧记一：妻子持刀去宰狼，妻子持刀去宰狼，小偷吓得发了慌；小偷吓得发了慌；躲在架后保己命，半片树叶遮目光。躲在架后保己命，半片树叶遮目光。按：wife（妻子），knife（小刀），wolf（狼），thief（小偷），shelf（架子），self（自己），life（生命），half（一半），le
7、af（树叶）。由self构成的复合词，其变化与self相同（如myselfourselves；yourselfyourselves；himelf，herself，itselfthemselves）。巧记二：练习四练习四wife-knife-wolf-thief-shelf-self-life-half-leaf-wives knives wolves thieves shelves selves lives halves leaves综合练习三综合练习三wife-key-glass-knife-boy-eye-watch-city-school-nwives nkeysnglasses nbu
8、ses nboysneyesnwatchesncities nschoolsnbox-nbaby-nfamily-nbrush-nmatch-nclass-ndesk-nhen-nday-nboxes nbabies nfamiliesnbrushes nmatches nclassesndesks nhensndays6.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)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:po
9、tato,tomato,hero巧记:英雄爱吃英雄爱吃 土豆炖西红柿土豆炖西红柿。练习四练习四piano-zoo-potato-photo-tomato-radio-npianosnzoosnpotatoesnphotosntomatoesnradiosSum 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
10、.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-birdsladiesorangesrulerscatsboysgirlscaseswiveswatchestreeskeysquestionsbedsheroesfriendsfamiliesdictionariesphotoscardsleavespartiescups综合练习三综合练习三nfamilies n
11、knives nbooks nbeds nwolves nbuses nshelves nzoos npotatoes ncities nphotos nleaf npiano nbox ntomato nbrush nwatch nbag ncat nradio nboy nstrawberrynleaves npianos nboxes ntomatoes nbrushes nwatches nbags ncats nradios nboys nstrawberries nfamily nknife nbook nbed nwolf nbus nshelf nzoo npotato nci
12、ty nphoto 不规则名词复数变化一不规则名词复数变化一deer-sheep-foot-tooth-goose-fish-Chinese-Japanese-deer sheep feet teeth geese fish Chinese Japanese不规则名词复数变化二不规则名词复数变化二man-woman-policeman-mouse-child-menwomen policemen mice childrenthis that I you he/she/it am/is thesethoseweyoutheyare 单数单数 复数复数不规则名词复数变化三不规则名词复数变化三thi
13、s-that-I-me-you-he/she/it/-him/her/it-am/is-these thosewe us you they themare综合练习三综合练习三me-Chinese-tooth-mouse-fish-you-she-watch-him-potato-shelf-child-woman-bag-bus-box-photo-sheep-this-that-I-us Chineseteeth mice fish you they watches them potatoes shelves children women bags buses boxes photos sh
14、eep-these those we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?