His grades are starting to suffer_初级英语口语

His grades are starting to suffer because he spends too much time on playing computer games.

因为他花太多时间到电脑游戏上，他的成绩开始变差。

suffer有受苦的意思，在上句中suffer 指变糟，受损害。

He suffered a great deal in those days.

那时他受了不少苦。