Ответ:
- 1) I have lived in this city since 2010.
- 2) She has been working here for five years.
- 3) They have known each other since childhood.
- 4) He has been ill since last Monday.
- 5) We have waited for two hours.
- 6) My brother has played the guitar since he was 10.
Краткое пояснение:
Краткое пояснение: «Since» используется для указания конкретной точки во времени, а «for» — для обозначения периода времени.