1.一般情况加s：book--booksgirl---girls2.以s、sh、ch、x结尾的加es：class---classesbox----boxesdish----dishes3.辅音字母+y结尾的变y为i加es：city---citiesfamily----families4.以o结尾的词+es的只有以下词：tomatoespotatoes注意：元音字母+O结尾，直接加sradios,zoos,photos5.以f/fe结尾的变f或fe为v+es：knife---kniveswolf---wolvesleaf---leaves特殊变化举例man-menwoman-womenchild-childrenpoliceman-policemenmouse-micefoot-feettooth-teethfish-fishsheep（羊）-sheepChinese-ChineseJapanese-Japanesepeople-people当people后加上s时即peoples表示“民族”例如：Thereare56peoplesinChina.中国有56个民族。自我检测我最棒1.写出下列词的复数形式this_________that_________city_________day________watch_______child_______photo________foot________book_______dress_________tooth_______sheep______box_______strawberry______2.用下列单词的正确形式填空。1.Ihavetwo_____(knife)2.Therearemany_____here.(box)3.Therearemany_____ontheroad.(bus)4.Some_____aredrawingonthewall.(boy)5.The_____areplayingfootballnow.(child)3.百变句型秀1.Thisisateacher.(变复数)2.Therearesomecowsonthefarm.(变单数)3.Icanseesomeelephantsintheforest.(变单数)4.Thiswomanisdancing.(变复数)我为自己打分：1.Theseareteachers.2.Thereisacowonthefarm.3.Icanseeanelephantintheforest.4.Thesewomenaredancing.
