Question

过去完成时的被动语态

Answer 1

过去完成时的被动语态(Passive voice)是动词的一种形式，用以说明主语与谓语动词之间的关系。

被动语态是动词的一种特殊形式，一般来说，只有需要动作对象的及物动词才有被动语态。汉语往往用"被""受""给"等被动词来表示被动意义 。

被动语态由“助动词be+及物动词的过去分词”构成。被动语态的时态变化只改变be的形式，过去分词部分不变。疑问式和否定式的变化也如此。

一般用法：

1、一般现在时的被动语态构成：is / am / are +及物动词的过去分词

Our classroom is cleaned everyday.

I am asked to study hard by my mother.

Knives are used for cutting things.

2、一般过去时的被动语态构成：was / were + 及物动词的过去分词

The new shop was built last year.

Dinosaur eggs were laid long long ago.

3、现在完成时的被动语态构成：has / have + been +及物动词的过去分词

This book has been translated into many languages.

Many man-made satellites have been sent up into space by many countries.

Answer 2

完成时态have done，被动将been加中间。 　　(过去完成时had done也包括在内)。 　　例：1、主动：We have studied English for 3 years and on at the spare-time school. 　　被动：English has been studied for 3 years by us and on at the spare-time school. have随新主语变为has) 　　我们已经在夜校里断断续续地学了三年英语了。 　　2、主动：They had produced 100 tractors by the end of last year. 　　被动：100 tractors had been produced by the end of last year. 　　到去年年底我们已生产出一百台拖拉机。 　　3、主动：They have set up a power station in their home town. 　　被动：A power station has been set up in their home town. 　　他们的家乡建立了一座发电站。 　　4、主动：They have warned us to be careful of rats. 　　被动：We have been warned to be careful of rats by them. 　　他们已提醒我们要注意老鼠。

Answer 3

过去完成时
主语+had +过去分词
We had finished learning Book1 till last week.
过去完成时的被动语态
主语+had been +过去分词
Book1 had been finished learning(by us )till last week.
祝你开心如意！O(∩_∩)O~~

Answer 4

已经做的事情，并不一定要用过去完成时。我们理解的“完成”，因为send是个一次性的动词，所以说出口的时候本身就已经是完成状态了。不像read等词，事情做了还有可能没做完。

楼主的句子在工作里使用的话，谁都能明白，不过其实用不了这么麻烦，过去时+被动就足够了。如果要强调“做完了”，用already，语气效果已经够了。如下：
Samples was sent out by 1-Fan-2010 already

Answer 5

过去完成时一般情况下及与过去相比，过去的过去。
形式为had加上动词过去时
如果为be动词则为had been
被动就是had been done