由于他的“举动”发生在过去，所以照片是其行动的唯一体现。
Since his "action" is in the past, the photograph is its sole embodiment.
最剧烈的增加发生在过去20年。
The most dramatic increases took place during the past 20 years.
这记录发生在过去的事件。
最后的一步是发生在过去十年里。
地球一小时发生在过去的星期六。
许多变化已经发生在过去的几个月。
和你是如何使它们发生在过去25年？
八过去完成时态：发生在过去的过去。
此事发生在过去，但对现在没有影响。 …
我们用一般过去时谈论发生在过去的事情。
We use the simple past tense to talk about things in the past.
这些话反映了重大的事件发生在过去的一年。
These words reflect major events that took place during the past year.
它指的是发生在过去但与现在有直接关系的某件事。
It refers to something in the past which directly related to the present time.
现在完成时与一般过去时所表示的动作或状态都发生在过去，区别…
Comparison Compare the difference between the simple past tense and the present perfect tense.
这发生在一个应用程序，我们没有改变在过去的三个月。
This happen in an application that we didn't change in the last 3 month.
这发生在一个应用程序，我们没有改变在过去的三个月。
This happen in an application that we didn't change in the last 3 month.
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