我是英语老师，我的朋友也是英语老师。

I am an English teacher, and so are my friends.

youdao

我的朋友的朋友也是我的朋友。

My friend's friend is also my friend.

youdao

利昂·沙利文既是我的导师，也是我的朋友。

Leon Sullivan was my mentor and my friend.

《柯林斯英汉双解大词典》

The old First Boston Company had some honorable employees and one of the employees was a good friend of mine. He went there in the early 1950s.

旧时的第一波士顿公司的职员,也是尽职尽责，我有位好朋友,在五十年代在那里工作。

斯坦福公开课 - 经济学课程节选

So a lot of... I still live with some guys from Ivy, some of them are best friends, my girlfriend is from Ivy.

好多……我还跟一些常春藤的人住在一起，有些是我最好的朋友，我女朋友也是常春藤的。

高尔夫俱乐部的回忆 - SpeakingMax英语口语达人

because, you know she was a friend of mine, too.

因为，她也是我的朋友。

SOHO的画廊 - SpeakingMax英语口语达人