Both of the book are interesting否定句（四个词!）

Both of the book are interesting否定句（四个词!） Both the books are interesting.改为否定句 Both of the twins are good at singing(否定句) the two books are both interesting.(改同义句） The book looks interesting.改为否定句 There are trees on both sides of the river.(改为否定句） Thre ____ Both of the children are from China.(改为否定句） Both of them are students.(否定句） There are lots of new books in the book shop.（改为否定句） There a The book looks interesting .怎样改为否定句? (Both/Either） of the two new books are interesting.该选什么? both of the boys are good at football 改为否定句应该是?