He is WangMing's brother.(改为复数）These are her pencil cases.(改

He is WangMing's brother.(改为复数）These are her pencil cases.(改 THese are orange pencil cases (改为单数句） Are these his pencil cases?改为单数形式 （ ）（ ） his pencil case? these are orange pencil cases 改为单数句 Is he jenny's brother 改为复数 我英语卷子 That is my pencil 改为复数句 This is her brother改为复数句 Is th It's her pencil—box.(改为复数句子） Is that her pencil?改为复数句 These are her pencil cases.这句话错在哪里啊. where's her pencil改为复数.the pictures are on the wall改为单数. 将句子改为各种形式That is my pencil case(改为复数形式）Thoes are our pens.(改 Those are Rose's pencil-cases.(用whose提问）