is diligent
あなたの妹は私の友だちの中で一番勤勉だ。
Your younger sister is the most diligent among my friends.
君たちはみんな勤勉だ。
You are all hardworking.
彼は今までにないほどに勤勉だ。
He is more hardworking than ever.
一般に日本人は勤勉だ。
Japanese people are generally hardworking.
トムって勤勉だと思う。
I think Tom is hardworking.
彼はクラスで抜群に勤勉だ。
He is by far the most diligent student in the class.
君は彼女と比べて勤勉だ。
You are more diligent than her.
その男たちはみんな勤勉だ。
All those men are hard-working.
彼と同様に君も勤勉だ。
You are as diligent as he is.