中なの

currently in the middle of

→ 中

phrase Uncommon #12,621

currently in the middle of 中 indicates that someone is currently in a state or engaged in an activity. なの adds an explanatory tone; the ending may sound like a question depending on intonation.

JA: 今、勉強中なの。

EN: I’m studying right now.

トムはまだ休暇中なの？

Is Tom still on vacation?

料理中なのよ？

I'm cooking, you know?

— ブエノスアイレス (1997)

トムはダイエット中なの？

Is Tom on a diet?

まだトムは電話中なの？

Is Tom still on the phone?

誰がダイエット中なの？

Who’s on a diet?

減量中なの？

Are you trying to lose weight?

トムはまだダイエット中なの？

Is Tom still on a diet?