1) Doctor John Snow was a well-known doctor in London. 定语

2) John Snow told the astonished people in Broad Street. 定语

3) He got interested in the two theories. 表语

4) Neither its cause, nor its cure was understood 表语

Past Participle as the Attribute定语 Past Participle as the Predicative表语

1.terrified people1.people who are terrified

2.reserved seats2.seats that are reserved

3.polluted water3.water that is polluted

4.a crowded room4.a room that is crowded

5.a pleased winner5.a winner that is pleased

6. Astonished children6.children who look astonished

7.a broken vase 7.a vase that is broken

8.a closed door8.a door that is closed

9.the tired audience9.the audience who feel tired

10.a trapped animal10.an animal that is trapped

There are many fallen leaves on the ground.

= There are many leaves which had fallen on the ground. (地上有许多落叶)

Some of them, born and brought up in rural villages, had never been to Beijing.

= Some of them , who had been born and brought up in rural villages, had never been to Beijing.

(他们中的一些人，在农村出生并长大，从没去过北京)

及物动词的过去分词表示结束了的被动动作或者没有一定的时间性,只表示被动关系。

polluted water

= water which is polluted

reserved seats

= the seats which were reserved

trapped animal

= the animal which was trapped

不及物动词的过去分词不表被动，只表示动作发生在谓语动词之前，含有动作完成，动作结束之含义。