What's the difference between を気に入る and が気に入る?


> AはBを気に入る。  
>  AはBが気にいる。

I've read が just emphasises B while を doesn't. Is it only that?

入る is intransitive, then why is the former correct?




Nowadays there are two common structures on 気に入る.

>   1. AがBを気に入る
>   2. Bが気に入る
>

From historical perspective, the early form of this expression is BがAの気に入る "B
goes into A's mind", which is rarely used nowadays but still common without A
or when A marked with particle は or so.

And later, as people began to see 気に入る as one transitive verb
(lexicalization), we can say also AがBを気に入る.

Reference: <https://cir.nii.ac.jp/crid/1520853834167886976> (This paper also
refers to other stuructures, but they seem expressions of transition period,
that is, they are no longer common.)




Nowadays there are two common structures on 気に入る.

>   1. AがBを気に入る
>   2. Bが気に入る
>

From historical perspective, the early form of this expression is BがAの気に入る "B
goes into A's mind", which is rarely used nowadays but still common without A
or when A marked with particle は or so.

And later, as people began to see 気に入る as one transitive verb
(lexicalization), we can say also AがBを気に入る.

Reference: <https://cir.nii.ac.jp/crid/1520853834167886976> (This paper also
refers to other stuructures, but they seem expressions of transition period,
that is, they are no longer common.)

