They are my boxes 改为否定句

They are my boxes 改为否定句 they are my aunts.改为否定句 There are two boxes on the table改为否定句 把they are boxes.改为单数句怎么改 They are my brothers （改为否定句） 急需 they are photos of my family(改为否定句) 把They are my uncles.改为否定句 They are my pencils (改为否定句） 改为否定句：They are my erasers.(yes) Those are my parents.(改为一般疑问句） They are my aunts.(改为否定句） they are my uncles改为否定形式 They are my uncles.改为否定句 This is not my sister.缩句