did good

• v. 有益(有用；有效)

did good的用法和样例：

例句

1. In the beginning, John did good work at school.
   开始时约翰在学校的成绩不错。
2. The speech did good execution for our side.
   这篇讲话对我们这一方大有良好效果。
3. Exercise will do good to your health.
   锻炼将对你的健康有益。