将以下单词变为复数形式.句子单数变复数carddaughtecousinfathersisterbrothersonpencilcasefamilybabydictionaryboyplayphotowatchbusclassitsheheyouIisamthisthatThisisabookThatisaneraserItisaredappleIam

　　将以下单词变为复数形式.句子单数变复数

　　carddaughtecousinfathersisterbrothersonpencilcasefamilybabydictionaryboyplayphotowatchbusclassitsheheyouIisamthisthat

　　Thisisabook

　　Thatisaneraser

　　Itisaredapple

　　Iamaboy

　　He/Sheisateacher

　　What’sthis?