我是谁的谁
eg. i am your father 我是你的父亲.
i am your sister's brother's father. 我是你的妹妹的弟弟的父亲.
I am sb.'s sb.
e.g.I am my father's daughter
I am A's B.
A是人名
B是关系father/mother/brother/sister/teacher....
eg:
I am Lily's sister.
Whose whom am I?
Who's Who Am I?