Both Mary and I are going shopping this Sunday. (改为否定句)
Mary         I am going shopping this Sunday.
Everyone will know the truth soon.(改为被动语态)
The truth                 known by everyone.
The boy in blue is Mr.Li’s child.(对划线部分提问)
is the boy in blue?
If you read more books, you will learn more information.（同义句转换）
books you read, the more information you will learn.
The computer is very useful. (改为感叹句)
the computer is!