is that your ruler 做肯定回答

is that your ruler 做肯定回答 Is that your ruler?做否定回答. Is this your ruler?作肯定回答 Is that his ruler(作肯定回答) this is his book that is your ruler 改成一般疑问句并作肯定否定回答 Is that your pencil case?做肯定回答 that is a ruler一般疑问句、肯定回答 is that a photo of your?做否定回答 is she your cousin?做肯定回答 this is a ruler.(对A RULER进行提问,并做肯定回答） is that your friend?肯定回答是什么 Is that your mother 肯定回答 IS THAT YOUR SKIRT?肯定回答?