why would you do such a thing
彼が携帯を水になぜそんな事を？
Why would he put his phone in water?
— ファニーゲーム (1997)
なぜだなぜそんな事を？
Why? Why would you do such a thing?
— マルコムＸ (1992)
私は彼がなぜそんな事をしたかとても知りたい。
I really want to know why he did such a thing.
なぜそんな事を言うの？
Why would you say such a thing?
— ロード・オブ・ザ・リング／二つの塔 (2002)
なのになぜそんな事を？
And yet, why would you do such a thing?
— フィールド・オブ・ドリームス (1989)