上unit2语法单复数.ppt

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1、名词单数变复数,可数名词,（1）（2）（3）（4）,定义：是可以计数的名词。,可数名词前可以用 a,an 限定。,可数名词前可以用 one,two,three 限定。,可数名词有复数形式。,an English book,English books,a map,maps,an apple,two apples,a pen,pens,a ruler,rulers,oranges,pens,keys,单数,复数,可数名词,如何变化？,规则变化,1.一般情况下，直接在词尾加-s构成复数形式。,map,pen,maps,pens,book,books,1.,box,2.以s,x,ch,sh等结尾的名词

2、，在词尾加-es构成复数形式。,boxes,class,classes,watch,watches,2.,3.以o结尾的名词，有的加-s,有的加-es构成复数形式。,photo,photos,heroes,tomatoes,zoos,4.以“辅音字母+y”结尾的名词，应改y为i，再加es。,family,families,以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式。,boy,boys,day,days,key,cities,keys,Sum up:P95,1.一般情况下,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，

3、要变y为i再加-es.以“元音字母+y”结尾的名词，直接在词尾加-s.4.以o结尾的名词,除了英雄爱吃西红柿炖土豆三个词加es,其余的都加s。,名词单数变复数后s/es 的读音,maps,rulers pens,classes,watches,oranges,cats,friends,/s/,/z/,/iz/,/dz/,1.在清辅音后读,2.在元音和浊辅音后读,3.在/s/z/t/d/后读,4.在/t/后读/ts/，在/d/后读,将下列名词变成复数形式,1.map2.cup3.ruler4.pen5.orange6.jacket7.key8.quilt,9.school10.friend11.

4、sister12.parent13.brother14.grandparent15.family16.day,s,s,s,s,s,s,s,s,s,s,s,s,s,s,families,s,this that I you he/she/it am/is,these,those,we,you,they,are,单数 复数,句子单数变复数,That is a pen.,Those are pens.,句子单数变复数,This is a book.,These are books.,句子单数变复数,It is a red apple.,They are red apples.,句子单数变复数,She is a teacher.,They are teachers.,句子复数变单数,These are rulers.,This is a ruler.,句子复数变单数,We are boys.,I am a boy.,按要求改写下列句子,Those are my maps.（改为单数）This is a photo.(改为复数）She is a girl.(改为复数）。,That is my map.,These are photos.,They are girls.,