我的是蘋果手機用英文怎么表達？

　　例句：

　　I'm helping this schoolfellow of mine.

　　我正在幫助我的這位同學。

　　"It's not mine," answered Martha stoutly.

　　“這不是我的�！爆斏瘓詻Q地回答。

　　"Mine, Peter," said Tootles on his knees.

　　“我的，彼得�！眻D托斯跪著說。