45069
With my Japanese teacher, we study some text about Doraemon.

> 未来{みらい}の **いろいろな便利{べんり}な** 「ひみつ道具{どうぐ}」をポケットの中に持っている」

I was thinking **いろいろな便利{べんり}な** had to be **いろいろで便利{べんり}な**.
CC BY-SA 4.0
2017-03-30T21:27:01.013
45058
2022-08-24T01:32:34.230
2022-08-23T19:19:59.440
30454
20510
question
grammar particles na-adjectives
いろいろな便利な - In some case, two na-adjectives linked not using で?
When you're addressing a quality to a noun you use the adjective own
particular rule:

NA adjective : place な after the adjective and then the word I adjective: just
place the word after the adjective

IE:

> 静か **な** 人(shizuka na hito) - Quiet Person.
>
> 嬉しい猫（ureshii neko) - Happy Cat.

You will use で for NA adjectives when you're connecting them to another
clause, but not when you're trying to modify a noun. And then use the "te
form" when you're doing it with I adjectives.

> 彼女は静か **で** 変だね(kanojo wa shizuka de hen da ne) - She is quiet **and**
> weird, right.
>
> 彼女は優し **くて** 、嬉しいね(kanojo ha yasashi **kute** , ureshii ne) - She is gentle
> **and** happy, right.
>
> いろいろな​便利 : いろいろ is a na adjective modifying 便利, therefore it needs な to
> connect them, meaning Many useful...

it's tricky because japanese has a lot of adjectives that are not really
adjectives in english.
CC BY-SA 3.0
2017-03-30T21:38:41.490
45059
2017-03-30T21:55:29.600
2020-06-17T08:18:27.500
-1
16104
45058
answer
Yes, two ordinary na-adjectives are connected with で:

>   * きれいで清潔な部屋 (×きれいな清潔な部屋)
>   * 親切で元気な人 (×親切な元気な人)
>

Nevertheless, I feel 色々な便利な道具 is far more natural than 色々で便利な道具. 便利で色々な道具 is
okay but I feel this is still slightly odd.

I could not find an article which clearly explains why. But 色々 is unlike
normal na-adjectives in some ways:

  * It works as an adverb without に. 「いろいろ勉強した。」「いろいろ教えてください。」 [It even takes と](https://japanese.stackexchange.com/q/6037/5010).
  * Its attributive usage (i.e, modifying a following noun) is common, but its predicative usage is relatively uncommon and literary. We say 本棚に色々な本がある but 本棚にある本は色々だ sounds stiff. (If I understand correctly the English adjective _various_ is not used predicatively, either. "×The books are various." I don't know if it's a coincidence.)
  * It has a lexicalized [連体詞](https://japanese.stackexchange.com/a/1016/5010) version, namely [色んな](http://jisho.org/word/%E8%89%B2%E3%82%93%E3%81%AA), which is frozen and never conjugates. (×色んだ is incorrect)

So perhaps you can think of this 色々 as a special case where 色々な is always used
even when coupled with another adjective.
CC BY-SA 4.0
2017-03-31T01:51:04.507
45069
2022-08-24T01:32:34.230
2022-08-24T01:32:34.230
30454
5010
45058
answer