These are keys?是疑问句吗

These are keys?是疑问句吗 These are my keys.改成一般疑问句 what are these keys ( Are these pens?是一般疑问句吗? Are these your keys的同义句是? What _____ these keys?Are these yours? these are bob's keys.改为一般疑问句并做肯定回答） whose keys are these?they are y什么 keys. Are these your keys?做否定回答 these are your keys 改为单数句 英语练习题：These are her keys.（改为一般疑问句并作否定回答).—_______  ____ These are my keys.改为否定句,改为单复数转换改为一般疑问句或提问,肯定句做回答.