高三英语知识点总结

　　各种时态的被动语态

　　被动语态概述

　　被动语态的概念：它是动词的一种形式，表示主语与谓语之间的执行或被执行关系。主动语态表示主语是谓语动作的执行者，例如：They saw the little boy crying by the river. 被动语态表示主语是谓语动作的承受者，例如：The little boy was seen crying by the river.

　　被动语态的.构成

　　被动语态的形式是由“助动词be+动词的过去分词”构成。助动词be随着主语的人称、数、时态等的不同而变化。几种常见时态的被动语态形式如下：

　　1. 一般现在时 am/is/are + 过去分词

　　例如：Rice is planted in the south of China.

　　2. 一般过去时 was/were + 过去分词

　　例如：These trees were planted the year before last.

　　3. 一般将来时 will/shall + be + 过去分词

　　例如：A sports meeting will be held next week in our school.

　　4. 现在进行时 am/is/are + being + 过去分词

　　例如：Your radio is being repaired now.

　　5. 过去进行时 was/were + being + 过去分词

　　When he got there, the problem was being discussed.

　　6. 现在完成时 have/has + been + 过去分词

　　His work has been finished.

　　Has his work been finished? Yes, it has. / No, it hasn’t.

　　7. 过去完成时 had + been + 过去分词