Using the root related to helping, compare the same person in both voices:
Passive meaningPassiveActive meaningActive
he is helpedيُنْصَرُhe helpsيَنْصُرُ
you (one woman) are helpedتُنْصَرِينَyou (one woman) helpتَنْصُرِينَ
I am helpedأُنْصَرُI helpأَنْصُرُ
The grammatical person stays the same; the voice changes from active to passive.