'I have eaten' is the present perfect tense of the verb 'to eat', 'I had eaten' is the past perfect and 'I will have eaten' is the future perfect.

I have eaten是动词eat的现在完成时；I had eaten是过去完成时；I will have eaten是将来完成时。

《牛津词典》

If the past is prologue, then it ought to be possible to draw some modest conclusions about the future from the wealth of data about America's present.

如果过去是一个序幕，那么应该有可能从有关美国现状的大量数据中得出一些关于未来的适度的结论。

youdao

To ensure the future of mankind, it is crucial to draw on our experience from the past.

为了人类的未来，我们必须借鉴过去的经验。

youdao

Maybe that is why the city's saying is "Our Future Is Our Past."

VOA: special.2009.06.01

According to the personality view, what makes somebody in the future the same person as somebody in the past is if it's part of the same ongoing personality.

根据人格理论，将来之某人与过去之某人为同一人,条件是拥有相同持续人格中的部分。

耶鲁公开课 - 死亡课程节选

President Kagame is working to find a balance between the pull of the future and the weight of the past.

VOA: standard.2009.04.08

These days, Tulowitzki is the future, Jeter is the past.

FORBES: Tulo is the Future, not Jeter

The fact is that peaceful movements for change are the future of the region and al Qaeda is the past.

WHITEHOUSE: Press Briefing

While the technology that goes into the console is definitely of the future, the idea behind the PS4 is rooted firmly in the past.

FORBES: Sony Bets On The Past, Forfeits The Future