彼は素行が悪く、学校から何度も注意を受けている。
His conduct is poor, and he has been warned by the school many times.
結婚してから、兄はすっかり素行を改めた。
Since getting married, my brother has completely mended his ways.
その選手は素行に問題があるとして、チームから処分を受けた。
The player was disciplined by the team over problems with his conduct.
探偵に頼んで、婚約者の素行を調べてもらった。
She hired a detective to look into her fiancé's conduct.