But at an event at the White House with past and present American Olympians, the president made clear his support for Chicago's bid is strong.

VOA: standard.2009.09.16

Use this pattern whenever you want to find out about the timing of an event in the past, present, or future.

当你想知道过去、现在或者未来某件事发生的时间时，你都可以使用这个句型。

When 课堂 - SpeakingMax英语口语达人

I mean, this past weekend, I did this event called "ZombieCon".

我的意思是说，过去的这个周末，我搞了这个所谓的 "ZombieCon" 的活动。

交新朋友的方法 - SpeakingMax英语口语达人

"She's not lying. I think I've eaten lunch once in the past week, and we literally run from one event to another, across traffic and through crowds and crowds, but it's very important that we make a good impression so we try to get there on time, and that sometimes involves running."

VOA: standard.2010.02.26