Для преобразования предложений из активного залога в пассивный, важно помнить, что объект в активном предложении становится подлежащим в пассивном предложении. Также используются различные формы глагола "to be" в зависимости от времени, и к ним добавляется причастие прошедшего времени (past participle) основного глагола. Давайте преобразуем каждое из предложений:
Active: They are now building new hospitals in the provinces.
Passive: New hospitals are now being built in the provinces.
Active: Will they publish her new novel next year?
Passive: Will her new novel be published next year?
Active: They will have completed the new petrol station by winter.
Passive: The new petrol station will have been completed by winter.
Active: The police have just arrested Jimmy on suspicion of murder.
Passive: Jimmy has just been arrested on suspicion of murder.
Active: They cut the gas off because Mr. and Mrs. Green hadn’t paid their bill.
Passive: The gas was cut off because Mr. and Mrs. Green hadn’t paid their bill.
Active: They will open a new hotel next week.
Passive: A new hotel will be opened next week.
Active: Our managers discuss important matters every Tuesday.
Passive: Important matters are discussed by our managers every Tuesday.
Active: The government closed the plant last year.
Passive: The plant was closed by the government last year.
При преобразовании предложений из активного залога в пассивный, важно помнить, что акцент смещается с деятеля на действие или объект действия. Это часто используется, когда деятель не важен или неизвестен, или когда необходимо подчеркнуть само действие.