documentaries aren't interesting改同义句

documentaries aren't interesting改同义句 All the books aren't interesting.(同义句) 如果把I think documentaries are interesting.改为否定句怎么改 but there aren't any students in it 改同义句 There aren’t any birds in the tree.改同义句 they aren't free 同义句 we aren't free now同义句 We aren’t busy today同义句 I think documentaries are interesting.(变为否定句) there aren't many interesting books in my study.（改一般疑问句） Those aren't any oranges.（改单数句） My parents aren't at home.（改写同义句）