Peter is Martha’s friend. 
Peter là bạn của Martha. * 012 like: der Freund → →
der Freund ☊ bạn ☊ 
☊ I don't like his choice of friends (= the people he chooses as his friends). ☊ choice ☊
They had a quarrel, but they're friends again now. ☊ be/make friends (with sb) ☊
I can't wait for this nonsense to end so that we can all be friends again. ☊ nonsense ☊