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.