变复数句1.This is my booy2.Is that his uncle3.Is she your friend4.Yes,it is5.This is my pencil case

this is my my friend(变复数) 变复数句1.This is my booy2.Is that his uncle3.Is she your friend4.Yes,it is5.This is my pencil case this.is pen变复数句 This is my friend的复数句是什么?my是否变？ 1.This is my sister.改为复数句2.That is my friend.改为复数句 She is my friend.变复数句 This is my watch.怎么变特殊疑问句变为复数句又是怎样的？ This is my sister(变为复数句) This is my dress.改成复数句. This is my cousin.(改为复数句) this is my desk改成复数句 this is my knife改复数句 This is my sister?怎么变复数形式?代词my用变复数吗? This is a photo of my family.变复数 this is knife in the box（变复数句 Is this a pen?（变复数句） This is a pen变为复数句,怎么变 This is a horse.变该句为复数形式