[被动语态的概念和构成]
 被动语态表示主语是动作的承受者,它由“助动词be+及物动词的过去分词”构成。助动词be有时态、人称和数的变化,其变化规则与be动词完全一样。请看下表:
     时态           被动语态的构成
一般现在时     am / is / are (not) done
一般过去时     was / were (not) done
一般将来时     am / is / are (not) going to be done 或will (not) be done
含情态动词的被动语态的构成: can / must / should (not) be done
[例句展示]
●Chinese is spoken by more and more people in the world.
●I am moved by his words.
●These computers were made in Japan.
●A talk on science will be given in our school next Monday.
●It must be done as soon as possible.
[拓展]
1. 短语动词用于被动语态时应作为一个整体,保持短语动词的完整性。如:

●A tall building was put up in my hometown last year.
●A man who is much talked about is always very attractive.