新人教版七年级英语上册语法-可数名词和不可数名词.ppt

第一讲,Countable Noun(可数名词),By:Miss Gao,1.可数名词,能独立存在的个体人、事物和以集体形式出现的人、事物。,个体名词,集体名词,2.可数名词的用法,2.1 可数名词单数的用法,当人或事物只有一个的时候，成为单数。习惯上，我们用a,an 或 one 来表示这种单个的数量。,a peach,a strawberry,a watermelon,a cherry,an ice-cream,an egg,an apple,an orange,2.2可数名词复数的用法,half an apple,an apple,three apples,three tomatoes,a piece of tomato,a watch,five watches,one piece of leaf,eight pieces of leaves,a butterfly,a lot of butterflies,可数名词单数变复数的规则,rule,clouds,moutains,flowers,可数名词一般是直接在名词后面加“S”,watches,boxes,buses,rule,rule,以字母 s,sh,x,ch结尾的单词，变为复数时在其后加es,dish-,bus-,fox-,fish-,dishes,buses,foxes,fish,fishes(种类),hero-heroes,tamato-tamatoes,potato-potatoes,buffalo-buffaloes,rule,骑着水牛（buffaloes）的英雄们(heroes)爱吃西红柿(tamatoes)和马铃薯(potatoes)。,其他以“o”结尾的单词直接加“S”,piano-,radio-,photo-,pianos,radios,photos,city-,key-,rule,元音字母+y结尾的：y-+s,cities,keys,leaves,rule,以f或者以fe结尾的单词，通常把f或者fe变成v,再加es,例：wife,knife,life,一个小偷(thief)的妻子(wife),用树叶(leaf)做的小刀(knife),杀死了一只狼(wolf),把它劈成两半(half),挂在衣架上,小结：可数名词复数的构成方法：,一般在名词后加-s：,dog-dogs,2.以s,x,ch,sh结尾的名词加-es,watch-watches,3.以辅音字母加 y 结尾的名词加-es,country-countries,4.以o结尾的名词，一般直接加-s,少数词加-es,potato-potatoes tomato-tomatoes,5.以f,fe结尾的名词，一般变f,fe为v再加-es,6.特殊变化的单词要熟记,child-children man-men tooth-teeth,knife-knives,