His backpack is （under the desk）对括号进行提问 Are your watches on the table?（做否定回答）Is your bag on the desk?做肯定回答

It is his backpack改否定句 his pen is backpack 修改病句 This is his backpack.改成否定句 中文意思：this backpack is his. Is this his backpack?肯定回答 his watch is in his backpack改为否定句 Is his backpack on his desk?否定和肯定回答、 not、 is、 his、 backpack、 it连词成句 His pen is in backpack这个句子哪里错了? his backpack is on the floor.划线提问 Is his pencil in the red backpack 作否定回答 Is his pencil in thered backpack 否定回答用英语 Is this his backpack.(做出肯定的简略回答) his backpack 改一般疑问句It's his backpack 改一般疑问句His telephone number is 535-2375 改一般疑问句This is my grandmother 改否定句 his baseball is in his backpack做一般疑问句 和回答 is that your friend 改为复数句 is this his backpack作否定回答 It is my backpack _your backpack Your backpack is