这就是我的朋友 用英语怎么说

This is my friend.

This is the one of my friends

The one who is my friend.

侧重点有点不同，自己琢磨一下，对理会西方人的表达习惯有好处的。

This is the friend of mine.
This is my friend
This is the one of my friends

第一个回答是错的！
This is my friend.
He is one of my friends.
都可以

They are my friends.他们是我的朋友。
He is my friend.他是我的朋友。
She is my friend.她是我的朋友。

第一个要改为This is the friend of mine.