Adverbial use of そんな without に


What puzzles me are these two sentences (coming from _Ensemble Stars!!_ , both
spoken by teenage characters and unrelated to each other):

> んもう。 **そんな** 睨まないでくださいってば〜。絶対悪いようにしませんから

> あっ。 **そんな** 適当に拭っちゃダメよォ！ バイ菌が入ったらどうするの！(about another character's wounded
> ear)

In both of these そんな seems to be used adverbially ("don't wipe [the blood] off
_so_ carelessly", "please don't glare at me _like that_ " (" _so much_ "?))
and so I'd expect it to be followed by に, like in this example sentence from
Tatoeba, for instance:

> 彼女のことで **そんなに** 真剣に悩む必要はなかったのに。

But, well, it clearly isn't, and I haven't been able to find information about
this kind of use of it online. Are those language errors or is something else
at play here?




In formal Japanese, yes, そんな is attributive (i.e., modifies a noun) and そんなに
is adverbial (modifies a verb or an adjective). However, in very informal
speech, そんな can work adverbially, too. そんな睨まないでください and そんな **に** 睨まないでください
are interchangeable, but the former sounds much more colloquial (or perhaps
slightly childish). This type of adverbial そんな should be avoided in business
settings.

Your examples happen to be used with negation, but it can also be used with
non-negative verbs. For example, you can say そんな心配なら電話して, そんな走ったら危ないよ and so
on.

I have looked at several dictionaries and websites, but none of them mention
this directly.




In formal Japanese, yes, そんな is attributive (i.e., modifies a noun) and そんなに
is adverbial (modifies a verb or an adjective). However, in very informal
speech, そんな can work adverbially, too. そんな睨まないでください and そんな **に** 睨まないでください
are interchangeable, but the former sounds much more colloquial (or perhaps
slightly childish). This type of adverbial そんな should be avoided in business
settings.

Your examples happen to be used with negation, but it can also be used with
non-negative verbs. For example, you can say そんな心配なら電話して, そんな走ったら危ないよ and so
on.

I have looked at several dictionaries and websites, but none of them mention
this directly.

