1.过去分词当定语：the fallen leaves 落叶,fallen定语修饰leaves
2.过去分词当宾补:I want to have my hair cut today.have...done,头发被剪,被动,当宾补
3.过去分词当状语：Seen from the earth,the moon is small.
4.倒装句 Only when you are tired will you go to bed.
5.省略句 i'm cleverer than he (is).