My parents have a bike.变一般疑问句,并作肯定回答/Are these your books?变为

My parents have a bike.变一般疑问句,并作肯定回答/Are these your books?变为 These are nice pictures.变为一般疑问句,并作简要的肯定回答和否定回答 These are my parents.改为一般疑问句,并做肯定回答 These books are mine.（变一般疑问句并作否定回答） _______________________? those are my english books. 变一般疑问句并做肯定和否定回答 1.These are your books.改为一般疑问句并作否定回答 These are your books.改为一般疑问句并作否定回答 my parents have been to beijing before(改为一般疑问句,并作肯定回答） those are my parents 改为一般疑问句并作肯定回答 these are my parents.(改为一般疑问句并作否定回答） These are your books.变一般疑问句 These are my grandparents?(改为一般疑问句并作肯定回答）