73925
In a Japanese children's book I read:

```

    のりまきみたいに　くるまれば　ふかふか　ふとんに　なるんだもん。
    
```

For the sake of analysis, I looked up the kanjis (correct me if they're
wrong):

```

    海苔巻きみたいに包まればふかふか布団になるんだもん。
    
```

From the context, it should mean something along the lines, "I can wrap it up
like a Nori roll and it becomes a soft mattress."

However, two things are unclear to me: First, is くるまれば really a form of 包まる?
If so, what verb form is it? jisho.org does not have it in its list of
inflections. What does this form mean, when do I use it?

Second, what does もん mean? Is it a shortened form of 物? How does this word
alter the sentence?
CC BY-SA 4.0
2020-01-17T12:46:34.817
73924
2020-01-17T13:47:00.203
30707
question
grammar reading-comprehension
のりまきみたいにくるまればふかふかふとんになるんだもん。
> 「のりまきみたいに くるまれば ふかふか ふとんに なるんだもん」

Since more context was definitely needed to discuss this sentence, I searched
and found out [here](https://ameblo.jp/newsongs/entry-10005844616.html) that
this is about a **_girl with extremely long black hair_**. That piece of
information is of much importance and the preceding sentence is:

> 「そとにだって ねられるの。」

Using kanji, we have:

> 「外にだって寝られるの。のり巻きみたいに包まればふかふかふとんにになるんだもん。」

The 「もん/もの」 should be written in **kana** because it is a sentence-ending
particle meaning roughly "because".

> First, is くるまれば really a form of 包まる? If so, what verb form is it?

「包まれば」 is simply the conditional form of 「包まる」 meaning " **if I am wrapped
up** ". It is used when talking hypothetically about getting wrapped up in
something. In this case, that something is the girl's own long hair. See what
I mean when I say I could never have answered this (seemingly simple) question
without more context?

My own TL:

> "I can even sleep outside. (That's because) if I am wrapped up in (my long
> hair) like a sushi roll, it turns into a fluffy futon."
CC BY-SA 4.0
2020-01-17T13:47:00.203
73925
2020-01-17T13:47:00.203
73924
answer