Do you mean present and past participles?
那一定是指现在分词或过去分词了。
They are used as auxiliaries to the present and past perfect tenses.
它们是用作现在完成时和过去完成时的助动词。
The present and past perfect tenses both belong to the perfect tense.
现在完成时和过去完成时都属于完成时态。
Her letters conflate past and present.
她的信把过去与现在结合在一起。
You've got to forget the past and start living in the present.
你必须忘掉过去，开始现在的生活。
You are my past,my present and my future.
你就是我的过去，我的现在和未来。
You are my past, my present and my future.
你就是我的过去，我的现在和未来。
It is the city where past and present meet.
过去和现在在这座城市里交汇成一体。
Augmented reality: past, present and future.
夸大现实：过去、现在、与未来。
In some sense, past, present and future are all there at once.
从某种程度上说，过去，现在，未来都在同一时刻同一地点。
The author has an eye for links between past and present.
作者看到了过去和现在之间的联系。
Tom: Voldemort is my past, present and future!
汤姆：伏地魔是我的过去，也是现在和未来！
Many of the most popular sites on the Internet, (past and present), run on PHP.
有很多在因特网上最流行的站点（过去和现在），都是基于PHP的。
The past, present and future all collide on next week's new episode of Nikita.
在下一集《尼基塔》中，过去、现在和未来将会交织在一起。
Compared with much of its past, Israel's present is prosperous and secure.
与过去相比，现在的以色列要繁荣的多，安全的多。
Can I, as an individual, do anything to make future history a little less tragic and less ironic than history past and present?
作为个人，我能尽全力使未来不像过去和现在那么富有悲剧和讽刺意味吗？
You can't understand the present and future without looking at the past.
不研究过去就无法了解现在和未来。
The challenge of fusing past and present is real for media companies, and for China.
将过去与现在融合的挑战对于媒体公司来说是真真切切的，对于中国来说亦是如此。
Review their past and present billing information.
查看过去和现在的账单信息。
So that got me thinking about the past, present, and future of journalism.
这些经历促使我思考新闻业的过去、现状和未来。
From them we can learn a great deal about the people of the past and their link to the people of the present.
我们可以从中了解到很多与过去的人们有关的事以及他们与现代人之间的关联。
It allows the present and the past to intertwine, which is how music works anyway.
这功能让现在和过去交织在一起，这正是音乐的功效。
The past is history, today is the present and tomorrow is an adventure.
过去的都是历史，今天就是现在，而明天将会是新的历险。
And go forward, thinking no longer of the past, but of peace and the present.
不要在过去停留太多时间，然后在和平中继续前行。
Release them from your troubled past and let your thoughts come back to the present.
这是个有魔力的行为！这将使你不再纠结过去，让你的思维回到当下。
See celebrities past and present as interpreted by the artist’s brush or lens.
欣赏有艺术家们画笔或者镜头下的以前现在的名人。
Happy people live in the present and avoid worrying about the past and the future.
快乐的人总是活在当下，避免担心过去和未来。
What do they reveal about the past and the present?
它们揭露了过去和现在的什么资讯？
What do they reveal about the past and the present?
它们揭露了过去和现在的什么资讯？
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