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 Whose keys are these? Are these pens?是一般疑问句吗? Are these your keys的同义句是? these are bob's keys.改为一般疑问句并做肯定回答） that is his green pen一般疑问句these are her keys whose keys are these?they are y什么 keys. these are your keys 改为单数句 what are these keys ( for 还是to Are these your keys?做否定回答 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. 1：These keys are his.变成一般疑问句:2:There's a“T on the wallet.变成一般疑问句3：This handbag is mine.对划线部分提问（划线部分是mine) These are her keys的同义句：These keys are（ ）. What _____ these keys?Are these yours?用介词填空 these are birds 一般疑问句 Are these birds?Yes,these are.回答错了吗 I lost a set of keys.然后是用 Is this yours?还是Are these yours? his keys are under the book的一般疑问句是?以及做题的思路?