过去完成时的被动语态

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皮敬如此镇迟。

一般用法：

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

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.

标签：被动语态,完成,过去