Expected sentence in article to use を but が is used instead


I'm reading this
[article](https://www3.nhk.or.jp/news/easy/k10011666941000/k10011666941000.html)
and I have come across this sentence and I'm wondering why **が** is used
instead of を. What's the reason am I missing here?

> １１日、豊洲市場がオープンして競り **が** 始まりました。
>
> My translation:
>
> On the 11th, Toyosu Market has opened and started auctions.




In addition to Kaizokugari's answer, I'd like to point out that 始【はじ】まりました is
an intransitive verb -- it cannot take an object marked with を. This verb
means that _"something starts on its own"_. The "something" here would be the
subject of the verb, and thus it takes the subject-marking particle が.

To break it down, your sample sentence in Japanese is a compound sentence.

> １１日、豊洲市場がオープンして競りが始まりました。

We could split this up into its component sentences:

> １１日、豊洲市場がオープンしました。  
>  The Toyosu market opened on the 11th.
>
> 競りが始まりました。  
>  Auctioning began.

Dividing it up into separate sentences like this doesn't sound very natural,
but it can help when trying to parse longer texts.




In addition to Kaizokugari's answer, I'd like to point out that 始【はじ】まりました is
an intransitive verb -- it cannot take an object marked with を. This verb
means that _"something starts on its own"_. The "something" here would be the
subject of the verb, and thus it takes the subject-marking particle が.

To break it down, your sample sentence in Japanese is a compound sentence.

> １１日、豊洲市場がオープンして競りが始まりました。

We could split this up into its component sentences:

> １１日、豊洲市場がオープンしました。  
>  The Toyosu market opened on the 11th.
>
> 競りが始まりました。  
>  Auctioning began.

Dividing it up into separate sentences like this doesn't sound very natural,
but it can help when trying to parse longer texts.

