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1、变化规则：1．一般情况下，直接加-s，如：play-plays,walk-walks2．以s，x，ch，sh及部分o结尾，加-es，如：pass-passes,fix—fixes,wash-washes,watch-watches,go-goes，do-does3．以“辅音字母+y”结尾，去y为i,再加-es，如：study-studiesfly--flies练习:一、写出下列动词的第三人称单数形式1.work_______2.watch_________3.clean________4.write_______5.teach_________
2、6.wash__________7.play_______8.read________9.go__________10.do__________11.fly________12.study________13.drink_______14.cry_______15.have________16.sit____17.swim_____18.draw______19.make____20.run_____21.carry_____22.leave_____23.arrive____24.watch_____25.clean____26.walk__
3、___27.stay_____28.jump____29.come_____30.pass_____31.stand_____32.like______33.love_____34.smile_____35.laugh____36.know_____37.speak______38.wear____39.look____40.drive_____41.skip____42.eat____43.buy____44.point_____45.live_____46.say____47.want____48.talk_____49.invite___
4、__50.count____51.take____52.brush____53.stay_____54.need____55.pack_____56.help_____57.find____名词名词可以分为可数名词与不可数名词，其中可数名词具有单、复数的形式；而不可数名词没有复数形式。1.从单数复数，变形规则如下：1．一般情况下，直接加-s，如：book-books,bag-bags,cat-cats,bed-beds2．以s.x.sh.ch结尾，加-es，如：bus-buses,box-boxes,watch-watches3．以“辅音字母+
5、y”结尾，变y为i,再加-es，如：family-families（家庭）,strawberry-strawberries（草莓）4．以“f或fe”结尾，变f或fe为v,再加-es，如：knife-knives5．不规则名词复数：man-men,woman-women,policeman（男警察）-policemen,policewoman（女警察）-policewomen,mouse-micechild（孩子）-childrenfoot-feet,.tooth-teethfish-fish,sheep（羊）-sheeppeople-peopl
6、e,Chinese-Chinese,Japanese-Japanese,当people后加上s时即peoples表示“民族”例如：Thereare56peoplesinChina.中国有56个民族。2.以下词为常为不可数名词，他们的复数形式就是他们本身。Water(水)milk(牛奶)tea(茶)rice(米饭)orange（橙汁）juice（果汁）bread（面包）练习题写出下列各词的复数I_________this___________that___________watch_______child_______photo________d
7、iary_________day________foot________book_______dress______________tooth_______sheep______box_______strawberry_____________thief_______yo-yo______peach______sandwich_______________man______woman_______paper_______juice____________________water________milk________rice_________
8、_tea_______________-注意be动词遇到名词时的运用:单数名词用is,复数名词全用are.名词单复数（1）名词可以分为可数名词和不可数
