The passive form marks the subject as the RECEIVER of an action. In Japanese it is heavily used to complain about something annoying done to you (the adversative / 'suffering' passive).
u-verb: -u → -a + れる (書く→書かれる) | ru-verb: drop る + られる (食べる→食べられる)
私は先生に褒められました。
Watashi wa sensei ni homeraremashita.
I was praised by the teacher.
褒める (praise) → 褒められる (be praised)
電車の中で足を踏まれた。
Densha no naka de ashi wo fumareta.
My foot was stepped on inside the train.
踏む (step) → 踏まれる (be stepped on)
雨に降られて、服が濡れた。
Ame ni furarete, fuku ga nureta.
I got rained on, and my clothes got wet.
降る (fall) → 降られる (adversative 'suffering' passive)
• The Agent Particle: The person/thing performing the action on you is marked by に (先生に = by the teacher). • Suffering Passive (Adversative): Japanese can make even intransitive verbs passive! 雨に降られた literally = 'I was fallen-on by the rain', showing you were bothered by it. • Passive vs Potential: ru-verb passive and potential are identical (食べられる); rely on context and the に particle to tell them apart.
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones られる is tested against.
Same shape for ru-verbs; the passive has an agent marked with に and often an adversative 'suffering' nuance, whereas potential means 'can do'.
てもらう frames receiving a favor positively ('had someone do it for me'); the passive often frames an action as done TO you, sometimes unwelcome.
させられる means 'was MADE to do' (unwilling); the plain passive is simply 'was done to'.
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