1.nà ér/nàr there 我住那儿 I live there that 那儿是我家 That's my home someone's house 去我那儿怎样？ What about go to my place? since then 自打那儿起，我爱上了你 Since then,I have fallen in love with you 2.nǎ ér/nǎr It seems only used in Taiwanese Manderin,but it should be 哪儿 but no 那儿 in Mainland China Mandarin where 你在那儿？ where are you? the modest word of "no",When someone says something nice to you,you can use it out of politeness in a Chinese way

我住在那人! no no no,wrong 那人=那个人=that （man/fella/guy/person/one...） when you used 那人 in conversation，the one you talk with usually would assume：1 you are not familiar with “that person” ,2 you don't know that person at all 那人是谁？ 那人挺有趣儿的。 那人在干什么？ 我就住在那人的房间对面。

What is "我住在那人”？ “那人” is "that man",那人 is able to describe passers-by. For exmple,you can say "那人真胖"、"那人真高“ .

maybe is I live there,in chinese is "wo zhu zai na li" when you say "那人" usually say that somone

yes