Here are the sentences converted from active to passive voice in the four specified tenses:
Present Simple:
Active: They subtitle a lot of foreign films.
Passive: A lot of foreign films are subtitled by them.Past Simple:
Active: Someone threw the letters away by mistake.
Passive: The letters were thrown away by mistake.Past Simple:
Active: Visconti directed Death in Venice.
Passive: Death in Venice was directed by Visconti.Future Simple:
Active: They will pick you up at the airport.
Passive: You will be picked up at the airport.Past Simple:
Active: They announced the date of the debate yesterday.
Passive: The date of the debate was announced by them yesterday.Future Simple:
Active: Will they publish her new book next month?
Passive: Will her new book be published by them next month?Present Perfect Simple:
Active: The police have just arrested him on the suspicion of murder.
Passive: He has just been arrested by the police on the suspicion of murder.Present Perfect Simple:
Active: They haven't cleaned the house for weeks.
Passive: The house hasn't been cleaned by them for weeks.Present Simple:
Active: They publish a lot of books on information technology.
Passive: A lot of books on information technology are published by them.Present Perfect Simple:
Active: They have built several new stadiums in Poland.
Passive: Several new stadiums have been built in Poland by them.Present Simple:
Active: They usually make their sculptures of wood.
Passive: Their sculptures are usually made of wood by them.Present Perfect Simple:
Active: Has he painted the walls yet?
Passive: Have the walls been painted by him yet?Past Simple:
Active: How did they discover the temples of Humankind?
Passive: How were the temples of Humankind discovered by them?Present Simple:
Active: Do they speak English here?
Passive: Is English spoken here by them?Present Perfect Simple:
Active: Oh no, they have cancelled our flight!
Passive: Oh no, our flight has been cancelled by them!Present Simple:
Active: Films inspire people to travel.
Passive: People are inspired to travel by films.Future Simple:
Active: They won't release The Hobbit this year.
Passive: The Hobbit won't be released by them this year.Past Simple:
Active: Where did they find the diamond ring?
Passive: Where was the diamond ring found by them?Present Simple:
Active: People don't use this word very often nowadays.
Passive: This word is not used very often nowadays by people.Present Simple:
Active: They don't expect me to help with the cooking.
Passive: I am not expected to help with the cooking by them.Future Simple:
Active: They will expect a high level of commitment from all the members of the team.
Passive: A high level of commitment will be expected from all the members of the team by them.Future Simple:
Active: A top consultant will examine you.
Passive: You will be examined by a top consultant.