have been used to 后面加什么

　　例句：

　　Other techniques have been used to solve the same problem.

　　已使用其他技术解决同一问题。

　　Other films have been used to produce sadness in the lab.

　　也有其他电影被用于在实验室里制造悲伤情绪。

　　We have been used to depending upon our parents and teacher.

　　我们一直习惯于依赖我们的父母和老师。