I suppose that a passive conditional is one containing a verb in the passive voice, though I have not seen the expression used.
Here are four conditional sentences:
If I crash the car, my father will kill me.
If the car is crashed, I will be killed.
I I crash the car, I will be killed.
If the car is crashed, my father will kill me.
The verbs in bold are in the active voice; the underlined verbs are in the passive.
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