Переведите -он давно начал изучать английский -он давно изучает английский -когда они впервые нарушили этот вопрос?сколько

1) He started learning English a long time ago. 2) He has been studying English for a long time. 3) When did they first infringe this matter? 4) How long have you been considering it? 5) After all the rooms had been booked, we went sightseeing. 6) Our scientists have made many important discoveries lately.