Examples of 'da/dearu' style that even writers who are conscious of 'desu/masu' style often overlook
This is sudden, but the Japanese language is really a pain, isn't it?
Personally, I don't really care about 'correct Japanese,' and I think anything is fine as long as it's 'text that doesn't burden the reader.'
H-o-w-e-v-e-r
When I am writing for work, naturally, I cannot just say that.
So, this time, it's about writing styles.
A writing style is, well, something like a method of expression (roughly speaking).
A common one is the distinction between 'desu/masu' style and 'da/dearu' style.
However, whether it's for your own blog or when writing as a professional writer, I think 'desu/masu' style is used most of the time.
'Ringo wa akai kudamono desu' is 'desu/masu' style.
'Ringo wa akai kudamono da' is 'da/dearu' style.
That is all.
Now, one thing that is easy to misunderstand here is thinking that 'It's okay as long as the end of the sentence is "desu/masu"!' that.
Even writers who strictly follow the rule of 'using desu/masu style' sometimes use 'da/dearu' style in a fleeting moment.
For example, at times like this:
'Because there is a possibility that it is a serious message depending on the case...'
'It is said that it is a state of being cornered.'
Yes, sometimes 'dearu' is included smoothly in the middle of a sentence.
This is surprisingly a blind spot (I do it too).
If you are going to properly use 'desu/masu' style, you have to avoid this.
'Because there is a possibility of a serious message depending on the case...'
'It is said that it is a state of being cornered.'
But you know, I think it's unavoidable to think that 'It's okay as long as the end of the sentence is "desu/masu"!'
After all, articles and books about writing usually just say
"make your sentence endings desu/masu (or da/dearu)"
and that's it.
That's why, even if it appears in the middle of a sentence like it did just now, you don't feel like anything is wrong.
But even if it's not at the end of a sentence, if it appears in the middle, it is strictly (or rather, simply) 'da/dearu' style, so you have to be careful.
I don't think the example sentences this time would feel particularly strange to readers, so I don't think you need to worry about it when writing your own articles.
However, if you are writing for work, rules are rules, and a professional delivers work that follows them properly, so you have to make sure you don't overlook them!