By any chance, you didn’t eat all the food in the boxed lunch, did you?
You didn’t happen to eat all the lunch box food, did you?
最近、お弁当を全部食べてくることが多くなりました
Recently, he has been eating all the food in his lunch box.
「もしかしてだけど~、、、お弁当全部食べてないよね?」
You didn’t happen to eat all the lunch box food, did you?
「ぜーんぶ食べたよ!!」
I did it eat all!!
えー、、、あんなに入ってたのに全部食べたの?」
What? There was so much in the box, you were able to eat it all?
「すごーーーーーい」
Wow!