被动语态和定语从句是英语语法中的两个重要概念。被动语态表示主语是动作的承受者，而定语从句则是修饰名词或代词的从句。下面是一些被动语态的定语从句例句，帮助读者更好地理解这两个概念的应用。
- The house that was built last year is now for sale. (去年建造的房子现在待售。)
这个例句中，定语从句 “that was built last year” 修饰名词 “house”，描述了房子的特征，而被动语态 “was built” 则表明主语（建造者）是动作的承受者。
- The movie, which was directed by Steven Spielberg, won several awards. (这部电影由史蒂文·斯皮尔伯格导演，赢得了几个奖项。)
在这个例句中，定语从句 “which was directed by Steven Spielberg” 修饰名词 “movie”，表明这部电影是由史蒂文·斯皮尔伯格导演的。被动语态 “was directed” 表示导演是动作的承受者。
- The book, whose cover was torn, was still worth reading. (这本书封面被撕裂了，但仍值得一读。)
这个例句中，定语从句 “whose cover was torn” 修饰名词 “book”，描述了书的状况，而被动语态 “was torn” 则表明书的封面是动作的承受者。
- The cake, which was made by my mom, was delicious. (这个蛋糕是我妈妈做的，很好吃。)
在这个例句中，定语从句 “which was made by my mom” 修饰名词 “cake”，表明这个蛋糕是由我妈妈做的。被动语态 “was made” 表示做蛋糕的人是动作的承受者。
被动语态的定语从句在英语语法中是一个常见的结构，理解它们的用法对于学习英语语法和写作都非常有帮助。
