'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》

For other people, the harvest festival is a time to look back at the past and look forward to the future.

对另一些人来说，丰收节是一个回顾过去、展望未来的节日。

youdao

Happiness is not a point of future and not a moment from the past, but a mindset that can be designed into the present.

幸福不是未来的某个节点，也不是过去的某个时刻，而是能够融入到当下的一种心境。

youdao

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

It resonates strong character, but it also sends a signal to the team that the past is the past and the future belongs to those who work together.

FORBES: Churchill: No One Likes a Sore Winner

In Aymara, spoken in South America, the future is behind and the past in front.

WSJ: Does Language Influence Culture?

And yet the relation between economic data - which are often imperfect, and can only represent the state of an economy as it was some time in the past - and the future is tenuous at best.

BBC: A Point of View: And all shall worship money