一、past用作形容词
1、用作定语 ～+ n.
For the past few days he has been ill.
几天以来他一直生病。
These things happened in the past years.
这些事情都发生在过去的年代里。
2、用作表语 S+be+～
Winter is past.
冬天已经过去了。
The Second World War was past.
第二次世界大战已经结束了。
二、past用作名词
The past is past.Let us look ahead.
过去的事已成过去,让我们向前看吧。
We cannot undo the past.
我们无法挽回过去的事。
三、past用作介词
The time is ten minutes past eight.
现在是8点10分。
Summer is past its full.
盛夏已过。
四、past用作副词
A car ran past at full speed.
一辆汽车以全速驶过。
Children came running past.
孩子们跑了过去。