brother...复数形式

brother...复数形式 Is this yuor brother改成复数形式 That is his brother的复数形式 twin brother的复数形式是什么 those的单数形式;he的复数形式;brother的复数形式,parent复数形式 This is my brother.改为复数形式急 This isn't my brother 变复数形式 sister brother son daugher father mother parent 的复数形式 写出mather father this sister brother is 的复数形式. 改为复数形式句子my cousin is her brother ls he your brother?改为复数形式are [ ] your [ ] My brother has a round face.(改为复数形式) brother的复数形式是brethren还是brothers my brother wants a botter of orange变成复数形式 brother的复数是什么 family的复数是?it的复数是?boy的复数是?This her brother改为复数形式是?Those are my sisters改为 This is my brother.改为一般疑问句 that is his photo.改为复数形式 写出下列单词的复数形式：this,is,brother,parent,sisier,friend,book,key