mother、this、that、sister、brother、parent 把这六个改为复数

mother、this、that、sister、brother、parent 把这六个改为复数 sister brother son daugher father mother parent 的复数形式 school,sister,mother,father,parent,brother,grandmother,grand this that am/is parent grand parent的复数 1.This is my sister.改为复数句2.That is my friend.改为复数句 将下列句子改为复数句1this is hs sister 2.that is my brother 3it is a b cousin ,this,photo,family,that,parent,boy,friend,sister,he,这 This is my brother.改为一般疑问句 that is his photo.改为复数形式 This is her friend改为复数句 That"s his brother改为一般疑问句 this is his brother(改成复数形式） that is my sister（改成复数形式） those 1.This is his brother改复数形式 2.That is my sister.改复数形式 3.Those This is Tom's parent. （改为复数句）