Can a subject introduced by が persist between sentences?


If an unknown subject is introduced by が in one sentence, can it still be the
subject in a subsequent sentence?

As an example:

> **よだかは** むねがつかえたように思いながら、又そらへのぼりました。また **一疋の甲虫が**
> 、夜だかののどに、はいりました。そしてまるでよだかの咽喉をひっかいてばたばたしました。

At first glance, it seems more natural to me to read the 3rd sentence thinking
the **beetle** (which is identified by が in the _2nd_ sentence) is the one
scratching the Nighthawk's throat and making a commotion as it is being eaten.

But if が subjects can't persist between sentences (I think they can't), then
**よだか** must be the subject of the 3rd sentence by default (since よだか is the
topic). And that would mean that the **Nighthawk** is scratching his _own_
throat and making a commotion as he swallows the beetle.

So I guess it's a straightforward question,  
**Can a subject introduced by が still be the subject in the following
sentence?**




Yes, it can.

You do _not_ have to mark a subject using は before you can omit it. There is
no such grammatical rule (I wonder where your assumption came from). Omission
of subjects happens purely depending on what can be assumed from the context,
verb choice, etc. Here, the implicit subject of the third sentence is clearly
the 甲虫.




Yes, it can.

You do _not_ have to mark a subject using は before you can omit it. There is
no such grammatical rule (I wonder where your assumption came from). Omission
of subjects happens purely depending on what can be assumed from the context,
verb choice, etc. Here, the implicit subject of the third sentence is clearly
the 甲虫.

