5 лет назад я учил английский язык

5 лет назад я учил английский язык ,а затем стал учить немецкий язык, так как работал в немецкой фирме

Результаты (английский) 1:

5 years ago I taught English and then began to teach German language, because he worked at the German firm

Результаты (английский) 2:

5 years ago I was teaching English, and then began to teach the German language, as he worked in the German company

Результаты (английский) 3:

5 years ago, i taught english, and then he taught german language, both worked for the german firm