this bedroom's vrey untidy IS为什么不放在 this 后面?

this bedroom's vrey untidy IS为什么不放在 this 后面? This bedroom's very untidy. This bedroom is very untidy.Bedroom's 是缩写还是所有格 very,this,untidy,is,bedroom连词成句 This room's very untidy.请问room后面为什么要加‘s啊? My Bedroom This is my bedroom.It's very nice. This bedroom is . This bedroom is Lucy's and Lily's 改错 This is Tom"s bedroom and it is also Jim"s bedroom(合成一句话） Th this后面为什么加is,不加are或am This is my bedroom 作文 Is this your bedroom?______