'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。
B. Fill in the blanks with the past perfect or simple past tense of the verbs in brackets.
试用括号里动词的过去完成时态或一般过去时态来填充空格。
Lin Yutang 's personality shaped the past perfect modality of China' s cultural transformation on individual level.
林语堂的人格是中国文化转型在个体层面的完成时形态。
We use the past perfect continuous tense to show that an action started in the past and continued up until another time in the past.
我们用过去完成进行时态来形容一个在过去开始的行动，这个行动持续到过去的另一个时间。
For Xiaojian, at 28 years is just past the ideal marriage age here, it seemed like a perfect solution.
对肖建来说，二十八岁只是刚刚过了当地的理想结婚年龄，看起来这是一个不错的解决方案。
Now we are approaching the end of the year, and it's the perfect time to reflect how we have done in the past year. We can then take some lessons for the New Year.
现是年末，是回顾将要过去一年成就的好时期，我们可以从中吸取对下一年有教益的教训。
Despite Microsoft's limited past success in getting people to hook up a PC to their TV, 2011 might be the perfect time for a new Windows Media Center box.
尽管微软在让用户把个人电脑和电视衔接上的成功非常有限，2011年也许会是Windows媒体中心电视机盒上市的绝佳时机。
The following five tips are something that I've learned over the past few months, and they have undoubtedly helped me a lot in improving my emailing skills. I am yet to perfect them though.
接下来的5招小贴士是我过去几个月来习得的一些经验，它们确实提高了我写邮件的技巧，但仍需得到改善，我相信这也只是时间问题。
Ms Lauvergeon, who is credited with rehabilitating the image of nuclear power over the past decade, is considered the industry's perfect ambassador post-Fukushima.
在过去十年中，Lauvergeon夫人因为恢复了核电站形象而广受好评。她被认为是福岛事件后核工业完美的大使。
We will offer you high quality products and perfect after service just as in the past.
我们将一如既往地为广大客户提供优质的产品及完善的售后服务。
When you ask about something that started in the past but continues to the present time, you use the Present Perfect tense, e.g.: I’ve been there for 5 years / I’ve been there for 5 years.
当你谈论在过去开始但是一直持续到现在的某事时，用现在完成时态，例如：I’vebeentherefor5years/我在那里已经5年了。
The book debunks poor science and the cherry-picking of statistical examples to feed hysteria about keeping invasive species out and protecting an imaginary perfect past.
本书驳斥了科学和统计样本选择行为中的谬误，后者认为要抵制入侵物种，保护想象中的完美过去。
We take what the market gives us, not creating a system from past charts to try to figure out the PERFECT target of pips to grab.
我们是在交易市场给我们的，而不是从过去的图表中找出重复，以此找出我们所需要的完美目标点位来交易。
If we say when a past event happened (for example, by using time-adverbs), we do not usually use the present perfect.
说过去发生的事件(例如：用过去时间状语)，我们通常不用现在完成时。
If zombies are rushing your base after a new wave, it might just be the perfect time to sprint past and try to capture their spawn point.
如果僵尸正在赶往后，新一轮的基地，甚至可能是完美的冲刺时间过去，尝试捕捉他们的产卵点。
We use the present perfect tense to talk about something that happened at an indefinite time in the past.
我们使用现在完成时谈论发生在过去某个不确定的时间的事情。
Too little have I experienced this in the past, but I will cry to God and wait upon Him to perfect his work in me.
我在已往对这个经历得太少了，但是我要呼求神，仰望他在我里面作成他的工作。
Our company will be as in the past cherished customers love and trust, the pursuit of perfect quality of service forever, let customer satisfaction report writing.
我们公司将一如既往的珍视客户的厚爱和信任，永远追求完美服务品质，书写让客户满意的答卷。
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。
When we talk about past events which have no present importance, we do not use the present perfect.
谈论过去的事件其对现在不重要，不用现在完成时。
When we want to talk about actions or situations which started in the past and have continued up to the present, we often use the present perfect to show the connection between past and present.
要谈论行为或状态其始于过去而持续到现在，经常使用现在完成时表现过去和现在之间的连接。
We use the present perfect tense to talk about things that started in the past and still have some connection with the present.
我们用现在完成时来谈论在过去开始并且仍与现在有联系的事情。
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。
At first glance it looks as if there is no element of "present involvement" in this use of the present perfect any more than in the simple past.
乍看起来，在现在完成时的用法中，似乎跟在一般过去时中一样，都没有“涉及现在”的因素。
The present perfect is used to express an action that started in the past but still continues in the present.
现在完成时用来表达开始于过去但仍在现在持续的动作。
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。
In this case, the past or present perfect tense should be used according to the grammatical rules of common English.
若按普通英语的动词时态规则，就得用一般过去时或现在完成时。
The English stative passive voice sentences can be the simple present, the simple past, the present perfect or the part perfect.
英语状态被动语态句型结构可以是一般现在时、一般过去时、现在完成时或者过去完成时。
The English stative passive voice sentences can be the simple present, the simple past, the present perfect or the part perfect.
英语状态被动语态句型结构可以是一般现在时、一般过去时、现在完成时或者过去完成时。
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