1、过去分词作前置定语,放在它所修饰名词前,相当于形容词的作用.例如：an organized trip,有组织的旅行,a broken cup 打破的茶杯,fallen leaves 落叶 a ploughed field 一块犁过的田
2、过去分词（短语）作后置定语,相当于一个定语从句,表示“被动”或“完成”的意思.分词作定语可以改成一个定语从句.例如：
1) I like the food cooked by my father 我喜欢爸爸做的饭
Cooked 在这个句子中就是过去分词作后置定语,这个句子可改成一个含有定语从句的复合句.如：
I liked the food which was cooked by my father.
2) Britain was the first country in the world to have a free health care system paid for by the government.
英国是世界上第一个由政府投资实行免费健康保障体系的国家.
Paid for 在这个句子中就是过去分词作后置定语.它同样可以改成一个含有定语从句的复合句.如：
Britain was the first country in the world to have a free health care system which was paid for by the government.
