Are these your ruler?的单数句是什么

Are these your ruler?的单数句是什么 is this your ruler? 改为复数句 Are these her erasers?改为单数句 Are those your ruler?改错 Are these your Are these your pencils? Are these books ( )(your)? are these your parents are these your cousin Are these your trousers?Yes,these are, these are book and ruler 里面里的book和ruler 需要加s吗 this is my ruler改为复数句肿么改啊?these are his pens.改为一般疑问句 Are those your parents?作肯定回答‘ those are her brothers.改为单数句 【they are】 my grandparents.对括号部分提问 （） （）your grandparents? These are your watch I know you name is Anna Those is an black pen These are my good friend,BobThat is he ruler 一共5句 找出错误 These are your watch~I know you name is Anna~Those is an black pen These are my good friend,Bob That is he ruler 一共5句 每句用3个~隔开的~ These pens are your.henna Are these your _____(letter) John,are these books----(your) Are these your T-shirt These are your new jeans.