'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.
Ihave eaten是动词eat的现在完成时；Ihad eaten是过去完成时；Iwill have eaten是将来完成时。
Each year at Davos the degree of optimism on the world economy is almost always a perfect reflection of the present while also a poor predictor of the future.
每年在达沃斯，对于全球经济的乐观程度几乎总是对当前形势的完美反映，而同时也是对未来的蹩脚预测。
To grasp the usage of the tenses, including the present, past, future tense and continue, perfect tense.
掌握现在时，过去时，未来时， 进行时， 完成时的各种用法。
So you learn the past tense and then two or three weeks later, oh now you are learning the present perfect, and then a few weeks later, you are learning the future, that's crazy.
你学习了过去时，然后两到三周后你开始学习现在完成时，几周以后你又开始学习将来时，这简直太疯狂了。
All the heavenly entities, the Amesha Spentas, instructed Zarathushtra in heaven, and he received perfect knowledge of past, present, and future.
所有的天体，AmeshaSpentas，在天上教导扎拉·图斯·特拉，他获得了过去，现在，未来的完美知识。
Fifth, bring forward the inadequacy of the present system and the perfect place to look to the future work to be done.
第五，提出本系统的不足和该完善的地方，展望未来要做的工作。
I want to be a practical teacher, so when I am working, I prefer to use'the Present Continuous Tense'or'the Present Perfect Tense'instead of'the Future Tense.
我给自己的定位是做一个笃行务实的老师，与其在工作中一直说“将来时”，我个人更倾向于使用“现在进行时”或者“现在完成时”。
I want to be a practical teacher, so when I am working, I prefer to use'the Present Continuous Tense'or'the Present Perfect Tense'instead of'the Future Tense.
我给自己的定位是做一个笃行务实的老师，与其在工作中一直说“将来时”，我个人更倾向于使用“现在进行时”或者“现在完成时”。
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