这个足球是谁的
应该表达为
1)Who is the football belong to?
或者
2)Whose is the football?
3)Whose football is this?
回答是
1:This football is belong to XXX(or him/her/them).
2 or 3:This is YYY's/pronoun football.
(YYY 是指 那个足球的主人,你可以写 Tim 或者人称代词his/her/their )
== This football is belong to Tim.
== This football is belong to him.
== This is Tim's football.
== This is his football.可以写it's某某某’s football吗？可以啊，回答例句倒数两句都是一个意思，只是换了This == It 这两个是代词，可以灵活用的.. 每种语言都是很灵活的，别看得太死板..