72522
asked this a while back: [で as 動作を行うときの様態 vs で as
だ](https://japanese.stackexchange.com/questions/62877/%e3%81%a7-as-%e5%8b%95%e4%bd%9c%e3%82%92%e8%a1%8c%e3%81%86%e3%81%a8%e3%81%8d%e3%81%ae%e6%a7%98%e6%85%8b-vs-%e3%81%a7-as-%e3%81%a0).
But i don't feel this aspect has ever become intuitive at all, especially for
adjectives.

eg.

> 爽やかで抜けるような青空と、この香りとは対照的に、大きくせり出した柵のグレーが強い拒絶を示している。

(speaker in a prison by the ocean) The gray of the large jutting fence shows a
strong rejection in contrast to the "爽やかで抜けるような(invigorating, like it was
escaping)" sky and ocean scent.

> 結果は今ひとつでナンパにも技術が必要だと身にしみた

In the end I have come to realize "今ひとつで(i am lacking?)", even nanpa requires
considerable skill.

i lean towards で as だ for both of these, but it's an very disjunctive read and
very hard to naturally translate.

When does someone purposely choose to use this sort of sentence structure?
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2019-10-14T23:57:39.500
72512
2019-10-15T11:39:59.580
2019-10-15T05:50:38.570
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question
particle-で
Further "で as 動作を行うときの様態 vs で as だ" clarifications
In both of your examples, で is not a particle but the te-form of the copula だ.

> 爽やか **で** 抜けるような青空

Here, で is used to [join na-
adjectives](https://japanese.stackexchange.com/q/11198/5010) (e.g., 簡単で便利な
"easy and handy"). 爽やかな and 抜けるような both modify 青空. Note that the adverbial
form of a na-adjective ends with に (e.g., 爽やかに "refreshingly").

> 結果は今ひとつ **で** ナンパにも技術が必要だと身にしみた。

This is a rather simple compound sentence made by joining the following two
sentences using the te-form of だ:

>
> 結果は[今一つ](https://jisho.org/word/%E4%BB%8A%E4%B8%80%E3%81%A4)だった。ナンパにも技術が必要だと身にしみた。  
>  The result was less than satisfactory. I realized even _nampa_ requires
> some skill.

This 今一つ is a lexicalized no-adjective. If this で were 様態のデ, 今一つで would have
to modify the following predicate, which is 必要だ, but "I realized I
unsatisfactorily need skill" would make no sense.
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72512
answer