Is this your +物品?回答是,Yes,it is.或者 No,it isn't.再根据具体情境引申,比如No,it isn't,I think it's 人名's,since.翻译的时候,我觉得你还是应该根据具体语境,‘它’可以不翻译出来.
No,it isn't,I think it's 人名's,since..可以翻译成“不,这不是我的...,我想它是（人名）的,因为.
Is this your +人?比如,Is this your elder brother?回答为yes,it is/yes he is.是的,他是我哥哥.