why so...
なんでこんなものもらってくるのかしら
Why would you bring home something like this?
— When Marnie Was There (2014)
「なんでこんな馬鹿な事しちゃって」
Why did I go and do something so stupid?
— ムーンライズ・キングダム (2012)
なんでこんな家を買おうと思ったのかな？
Why did I ever think buying a house like this was a good idea?
なんでこんな車買ったの？
Why did you buy a car like this?
「今日火曜日だよね？」「うん」「なんでこんな混んでるんだろう？」
“It’s Tuesday today, right?” “Yeah.” “Why is it so crowded?”
なんでこんな早く来たの？
Why did you get here so early?
なんでこんなわかりやすいウソつくんだろ？
Why would they tell such an obvious lie?