Tatiana Gerasimenkoadded a comment 5 лет назад
Before my friend started studying English in college, he (had) learned German.
до того как мой друг начал изучать английский язык в университете,он выучил немецкий
Before my friend started studying English in college, he (had) learned German.
Before he started his English studies at an university my friend had learned German
Before my friend started studying English in college, he (had) learned German.
+++Tatiana
Valery, that’s not English