(1)、He often carries heavy things for the lonely old man next to his home.(改为否定句) He often heavy things for the lonely old man next to his home.
(2)、The magic performance by Liu Qian is so amazing that people can't forget it.(保持句意基本不变) The magic performance by Liu Qian is amazing for people forget.
(3)、The red car is Mr Green's. (对划线部分提问) is Mr Green's? .
(4)、“It often takes me ten minutes to have lunch.” He said. (改为间接引语) He said that it often ten minutes to have lunch.
(5)、The child bought his mother a new hairclip.(改为被动语态) A new hairclip bought his mother.