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。