the teacher must believe in the effectiveness of the practices used
used在这里修饰practices,因此上句可以定成：
the teacher must believe in the effectiveness of the used practices
老师必须相信曾用的实践的效果.
求问：该句中used在句中修饰的是什么?在这里是什么用法?
the teacher must believe in the effectiveness of the practices used
used在这里修饰practices,因此上句可以定成：
the teacher must believe in the effectiveness of the used practices
老师必须相信曾用的实践的效果.