Is his pencil in thered backpack 否定回答

Is his pencil in thered backpack 否定回答 Is his pencil in the red backpack 作否定回答 his watch is in his backpack改为否定句 Is it in the backpack?做否定回答 Is lt his pencil?No,___ ____做否定回答 His books are in the backpack 对这个句子做肯定回答以及否定回答 His pen is in the pencil case 改为否定句 It is his backpack改否定句 This is his backpack.改成否定句 is that your friend 改为复数句 is this his backpack作否定回答 his pencils are in the backpack 改为一般疑问句 并做否定回答 Is this his backpack?肯定回答