賢い子だ

smart kid

→ 賢い
phrase Rare #28,934
smart kid Used to praise a child or young person for being clever or well-behaved. With ね, 賢い子だね means “what a smart kid” or “you’re a smart kid.”
JA: 妹は本当に賢い子だ。
EN: My little sister is really a smart kid.

賢い子だ

What a smart kid.

彼は本当に賢い子だ

He's a really smart kid.

あの男の子は大変賢い子だ

That boy is very smart.

おまえはもっと賢い子だと思ってたよ

I thought you were smarter than this.

— ライフ・イズ・ビューティフル (1997)

賢い子だ

What a clever child.

— ネバーエンディング・ストーリー (1984)

トム賢い子だ

Tom is a smart kid.