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よ particle, has among other uses, is used to convey new information, which he
believes that the other person does not know about/he assumes that the other
person does not know. E.g. One person, who attended a party, to the other
person (who did not attend), 楽しいよ.

However, I am confused as to what extent can it be used to convey new
information. E.g. when introducing yourself to someone new, you don't often
hear 私はXyz-sanですよ, even though it is a new information. So, I wanted to ask
was, what is the scope of よ in context of introducing new information. Like
can we use it, every time we convey something new? E.g. Like I read XYZ book,
and B does not know about it, can I generally speak 私はXYZを読んだよ, e.g. my mother
is asking me what is my brother doing (as she does not know and wants to
know), to convey this can I use 兄貴は食べ物を作っていますよ, or is there a limit on the
type/form of new information we can share by using the particle よ?

教えてください
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2020-12-09T12:28:35.000
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2020-12-10T09:20:18.720
2020-12-09T12:46:22.527
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question
grammar particle-よ
Scope of よ particle, when used to convey new information
I don’t agree with your definition. You don’t use it just because the other
person does’t know something or you want emphasize what you think is
important.

The point is gap of recognition between the speaker and the listener. For
example, 楽しいよ implies that the other person is not enjoyed enough as you think
they should, and you are trying to change their mind or action, especially in
rising intonation. (note; You may conventionally use it even if you don’t
really mean that, especially when you refer to what’s socially considered
beneficial to the listener. e.g. おいしいですよ〜 ぜひ、ひとつ)

  * わかりましたよ (I got it. Stop asking already!)
  * あったよ (We found it. Relax!)

Secondly, it can be used with plain forms of predicates for the purpose of
easing more or less too decisive tone. Your example of 読んだよ falls into this,
and would be all the more natural if that responded with the questioner’s
curiosity in a question, which is what’s socially considered beneficial to the
other person. In this regard, 読みましたよ would feature the aspect explained above,
in short, sound like “I read it. The said one”.

As for the third example, you can’t use よ as a response to the questioner who
is actually seeing the scene, (edit; when you are not in the scene, you can,
because there’s a gap in terms of knowledge.) because there’s no gap
concerning perception. In other words, you can use it as a monologue, or a
response as an interpretation of the situation, which is expressed as
作ってるんだよ.What’s natural is simple 作ってる in this case, anyway. Incidentally,
using polite style among family member is not ordinary.
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2020-12-10T07:16:16.280
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answer