Hiskeysareonthesofa?（改为一般疑问句并作简短的肯定、否定回答）

Question

His keys are on the sofa?（改为一般疑问句并作简短的肯定、否定回答）

Answer 1

正确答案：
Are his keys on the sofa?Yes,they are /No,the aren't
“These are your sisters.”改为否定句These aren't your sisters.
解析：你问的这些都是含be的情况,只要将be +not就是否定句,如果有some,把some改为any 就行了.