单词past perfect
n.: 过去完成时
网络: 过去完成式；过去完成时态；超魔鬼毁灭者
过去完成时；过去完成式:
the form of a verb that expresses an action completed before a particular point in the past, formed in English withhad and the past participle
过去完成时
followed by a past tense clause showing a present wish and a past perfect tense clause expressing a past wish, e . g.
从句中用过去式来表达现在的愿望，用过去完成式来表达过去的愿望。
Also involved was Past Perfect Productions, which reconstructs archaeological and historical sites through virtual reality.
同时参与这项工作还有“历史经典”公司，他们通过虚拟现实再现考古和历史遗迹。
present perfect as opposed to past simple . past simple as opposed to past continuous and past perfect.
我们使用现在完成式去说明某事开始于过去并持续到现在。
When research process narration mentioned before what described by past tense , we had better use the past perfect tense.
在采用一般过去时叙述研究过程中提到在此过程之前发生的事，最好采用过去完成时。
Normally, such sentences in the past perfect follow another sentence in the simple past tense, as in the following example.
一般来说，这种过去完成式的句子是紧接着另一个一般过去式的句子，看下面的例句。
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。
And will learn The simple past tense, The present perfect tense, The past perfect tense as well as The future tense.
这个学期，我们学到了过去时，现在完成时，过去完成时和将来时等。
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。
A. Fill in the blanks with the past perfect tense of the verbs in brackets.
试用括号里动词的过去完成时态来填充空格。
the future perfect tense ? the past future perfect tense ? the present perfect continuous tense ? the past perfect continuous tense ?
将来完成时将来完成时？过去将来完成时过去将来完成时？现在完成进行时现在完成进行时？过去完成进行时过去完成进行时完成进行？