1、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名词单数变复数口诀名词单数变复数口诀(一一)规则规则变化变化 名词单数变复数，直接加名词单数变复数，直接加-s 占多数；占多数；book-books;pen-pens;apple-apples s,x,z,ch,sh 来结尾，直接加上来结尾，直接加上-es；dress-dresses;box-boxes;buzz-buzzes;watch-watches;brush-brushes 词尾是词尾是 f 或或 fe，加，加-s 之前先变之前先变 ve；leaf-leaves;wife-wives;knife-knives 辅音辅音+y 在
2、词尾，把在词尾，把 y 变变 i 再加再加-es；study-studies;baby-babies;city-cities 元音元音+y在词尾在词尾,只加只加s就足够就足够 boy boys;day days;monkey monkeys 词尾字母若是词尾字母若是 o，常用三个已足够，常用三个已足够，要加要加-es 请记好，请记好，hero,tomato,potato。黑人和英雄爱吃土豆和西红柿。negro nigr-negroes;hero hr-heroes;potato-potatoes;tomato-tomatoes 其余其余o结尾的词加结尾的词加s,photo-photos;pia
3、no-pianos(二二)不规则变化不规则变化 男人女人 a 变 e，鹅足牙 oo 变 ee；man-men;woman-women;goose-geese;foot-feet;tooth-teeth 老鼠虱子也好记，ous 变 ic；mouse-mice;louse las-lice las 孩子加上 ren，鱼鹿绵羊不用变 child-children;fish;deer;sheep this-these(这些)that-those(那些)wivesleaveswolveswife(妻子)leaf(树叶)wolf(狼)roof(屋顶)roofsroof“小偷”(thief)的“妻子”(wi
4、fe)用“刀子”(knife)和“树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。巧记：名词单数变复数口诀名词单数变复数口诀（一）一）规则规则变化变化 名词单数变复数，直接加名词单数变复数，直接加-s 占多数；占多数；s,x,z,ch,sh 来结尾，直接加上来结尾，直接加上-es；词尾是词尾是 f 或或 fe，加，加-s 之前先变之前先变 ve；辅音辅音+y 在词尾，把在词尾，把 y 变变 i 再加再加-es；元音元音+y在词尾在词尾,只加只加s就足够就足够 词尾字母若是词尾字母若是 o，常用三个已足够，常用三个已足够，要加要加-es 请记好，请记好，hero,tomato,p
5、otato。其余其余o结尾的词加结尾的词加s,photo-photos;piano-pianos（二二)不规则变化不规则变化 男人女人男人女人 a 变变 e，鹅足牙，鹅足牙 oo 变变 ee；老鼠虱子也好记，老鼠虱子也好记，ous 变变 ic 孩子加上孩子加上 ren，鱼鹿绵羊不用变，鱼鹿绵羊不用变名词单数变复数后名词单数变复数后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
6、,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-party-cup-birdsladiesorangesrulerscatsboysgirlscaseswiveswatchestreeskeysquestionsbedsheroesfriendsfamiliesdictionariesphotoscardsleavespart
7、iescupsthis 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
8、变单数句子 TheseThese are 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?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.pencil-5.watch-3.6.dictionary-4.7.man-8.it-5.9.parent-10.boy wearetheypencils watchesdictionaries men they parentsboys
