those are photos of my fanily 改为单数句

''There are some photos on those desks''改为单数句 Those are my friends 改为单数句 those are my brothers.改为单数句 Those are her photos改为单数形式~ Those are my family photos改为否定句 They are the photos of my family 改为单数句 She is Guo jingjing‘s Those are my shoes.怎样改为单数句? These are my photos.改为单数句子 they are photos of my family(改为否定句) Black is my family name.改为同义句 Those are oranges改为单数句 Are you those are my pencils 改为单数句子 Those are my friends怎样改为单数句?什么是单数句?