These are ours改为单复数形式急

These are ours改为单复数形式急 These books are ours.(改为一般疑问 用theirs改为选择疑问句These apples are ours Are these your friends.改为单复数错了 是否定回答 are these desks?单复数形式 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. These ducks are ours.(对ours提问) These books are yours.(用ours改为选择疑问句）___ these books yours _____ _______? 改错：These are ours books These are my keys.是不是单复数转换? These tomatoes are ours.(对ours提问） -Are these coats_____ -Yes,they're ours. these shoes are ours.单数句 These books are ours.(同义句） These English teachers are in china（改为复数句) These are english books 改为单数或则复数 what are these改为复数句要死了 they are their computer.单数 this is my watch.复数 whose teacher are these?they are ours.单数ls this your pencil?yes,it is.复数