答：1.一般都表被动且完成：the house built last year.= the house which was built last year.
房子是被造的,且去年就造好了.
2.有时只表示完成,并不表示被动,如：the fallen leaves= the leaves that has/had fallen.
因为fall 是不及物动词,它的过去分词只表示完成,不表示被动.a retired worker
= a worker who has retired就属于这种情况.
3.表示状态?（第一次听说,其实也有被动之意）：a broken glass= a glass which is /was broken 楼上说的对,应该是将它归入被动且完成.