those are my sisters的单数句

those are my sisters的单数句 Those are my sisters改为单数形式是? Those are my friends 改为单数句 those are my brothers.改为单数句 Those are my shoes.怎样改为单数句? Those are my friends怎样改为单数句?什么是单数句? These are my sisters 对划线部分提问（划线部分：sisters）.Those are my brot 同义句转换：These are my books.改为单数句：Those are red appies. Black is my family name.改为同义句 Those are oranges改为单数句 Are you This is my friend . 复数句 Those are ancient buildings .单数句 Are those are my pencils 改为单数句子 （those are her sisters）改为否定句