Пассивный залог turn from active into passive. 1. men with slide rules used to do these calculations; now a computer does them. 2. the police shouldn’t allow people to park there. 3. you mustn’t move this man: he is too ill. you’ll have to leave him here. 4. you are to leave this here. someone will call for it later on.

1 Calculations used to be done by men with slide rules now they are done by a computer.
2 People shouldn’t be allowed to park there by the police.
3 This man mustn’t be moved ,he is too ill. He will have to be left here.
4 This is to leave here.It will be called for later on.