Some things can't be active:
We wouldn't say, 'The box got into the car', we have to say, 'The box was put into the car'.
And some things can't be passive:
1. Actually I think this one could be passive, but we generally don't think of a person being put into a car (although one certainly can be put into an ambulance, and we would put a baby in the car).
2. Another person can't do your hoping for you. They can, however, hope that positive things happen to you, as in: 'People hope you succeed', but that's still active voice.
3. In the same way, someone else can't walk or slam doors for you.
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