nine thirty

half past nine

thirty to ten

past

1.过去的；昔日的

gone by in time

in past years/centuries/ages

在过去的岁月 / 世纪 / 时代

in times past

在过去

The time for discussion is past.

讨论的时间已过。

2.[only before noun] 刚过去的；刚结束的

gone by recently; just ended

I haven't seen much of her in the past few weeks.

近几周来我很少见到她。

The past month has been really busy at work.

上个月工作实在是忙。

3.[only before noun] 从前的；以往的

belonging to an earlier time

past events

以往的事件

From past experience I'd say he'd probably forgotten the time.

根据过去的经验，我想他可能把时间忘了。

past and present students of the college

学院的老校友和现在的在校生。

Let's forget about who was more to blame─it's all past history .

咱们且忘掉更该责怪谁吧——那都是陈年旧账了。

4.[only before noun] (grammar 语法) （动词）过去式的

connected with the form of a verb used to express actions in the past