97951
> 店内は、外見のぼろっちさと同じように、古めかしい洗濯機や乾燥機 **で** 占められていた。

Looking at some example sentences of 占める, it's almost always in the natural
form and the particle を is used to describe the direct object, and the
particle で the location where something is being occupied, like
"[彼は会社で重要な地位を占めている](https://jisho.org/sentences/5186684bd5dda7e981008805)".

But in this case, considering the verb is in the passive form, could I still
use the particle を here? Would it be always necessary to use で? One thing that
I recently learned is that the particle を in transitive verbs in the passive
form is often changed to が, as in ～を行う → ～が行われる. Would be possible to use が
instead of で here?

I'm not sure but if the author of this sentence wanted to use 占める in the
natural form, 店内 should be used as 店内では and 洗濯機や乾燥機 should be used with を,
right?
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2023-01-04T09:59:02.230
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question
particles particle-で particle-を passive-voice
Particle usage of transitive verb in the passive form (～を占める → ～で占められている)
The direct answer to your questions is NO.

I think you are confusing the subject/object in the sentence. Comparing with
彼は会社で・・,

| ocuppying | occupied | place(adverb)  
---|---|---|---  
店内は、・・・ | 洗濯機や乾燥機 | 店内 | -  
彼は会社で・・ | 彼 | 重要な地位 | 会社  
  
So the very literal translation of the quoted sentence is

> The inside of the shop, just as shabby as its outside, was occupied by
> oldish washing machines and tumble dryers.

Its active counterpart (which is not totally natural probably due to the
subject being inanimate) is,

> 外見のぼろっちさと同じように、古めかしい洗濯機や乾燥機 **が** 店内 **を** 占めていた.
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answer
If the verb were 占める, 洗濯機や乾燥機 would be the subject and 店内 would be the direct
object.

> 洗濯機や乾燥機が店内（の場所）を占めていた。

So in the passive voice, the subject marker が should be used for 店内. For
洗濯機や乾燥機, you should use either に（よって） or で. The former is like “by” and the
latter “with”.

> 店内（の場所）が洗濯機や乾燥機に（よって）占められていた。

> 店内（の場所）が洗濯機や乾燥機で占められていた。

によって sounds better than に to me.
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answer