l的形容詞性物主代詞怎么寫

　　My children are my life.

　　我這幾個孩子就是我的命根子。

　　My brother is my senior by two years.

　　我哥哥比我大兩歲。

　　My whole family came to my graduation.

　　我的家人都來參加了我的畢業(yè)典禮。