Mike iost his backpack in the taxi.怎样变为否定句?

Mike iost his backpack in the taxi.怎样变为否定句? mike his the lost in backpack hotel his watch is in his backpack改为否定句 句型转换1`mike does his homework in the evening(否定句）mike-- --his Is his pencil in the red backpack 作否定回答 My english book is in the backpack 改否定句 It is his backpack改否定句 This is his backpack.改成否定句 Come in the pool.(变为否定句) His books are in the backpack 对这个句子做肯定回答以及否定回答 his pencils are in the backpack 改为一般疑问句 并做否定回答 The boy can find his way home.(变为否定句)