请问That is her brother.变复数句,要不要把her变成their啊?

That is her brother 请问That is her brother.变复数句,要不要把her变成their啊? That is she 还是That is her That is her box.用her 提问 That is her coat.对her提问 that is her English d____ That is her pen.改为否定句That her pen. Who is that beside her?请问这句话变成肯定句怎么说? IS that her book. 改为否定句 Is that her English book?复数形式 That is her ruler改为同义句 That is her eraser.改为一般疑问句 that is her friend.改为一般疑问句 That is her eraser改为否定句 That is her backpack 改成否定句 Is that her bag 改成特殊疑问句 Is that her brother?（改为陈述句） That is (her) father划线提问