those are my penfriend,s rooms 否定句和一般疑问句和画线部分提问

问题描述:

those are my penfriend,s rooms 否定句和一般疑问句和画线部分提问
画线的是 my penfriend,s

否定句
(应该是penfriend's吧)
Those arenot(aren't) my penfriend's rooms.
一般疑问句
Are those your penfriend's rooms?
对画线部分提问
Whose rooms are those?