被动语态 一般式 being done 所表示的动作是一个正在进行中的被动动作 完成式 having been done 表示一个被动动作发生在谓语动词所表示的动作之前 　　Mary said angrily pointing to the notice.

　　玛丽生气地指着布告说。

　　Having watered the vegetables，we began to dig the ground.

　　我们浇过菜之后，就开始挖地。

　　This is the computer being repaired by Tom.

　　这就是汤姆正在修的电脑。

　　Having been criticized by the teacher，Wang Ming gave up smoking.

　　受到老师的批评后，王明戒烟了。

　　[即时训练1]　单句语法填空

　　①The building being repaired(repair) now is our school library.

　　②Don't keep the children working(work) on their lessons all day.

　　③Having been called(call) by a stranger，he realized what would happen.

　　二、现在分词的句法功能

　　1．作定语

　　单个的现在分词作定语时一般放在被修饰词之前；现在分词短语作定语一般放在被修饰词之后，且往往可转化为定语从句。

　　Changing attitudes towards education.

　　不断变化对教育的看法。

　　The building being built now will be our dining hall.

　　＝The building which is being built now will be our dining hall.

　　现在正在建造的建筑将是我们的餐厅。

　　[明辨异同]　

现在分词作定语 它所修饰的名词通常就是现在分词的逻辑主语，并且通常可转换成一个定语从句 动名词作定语 表示的是被修饰名词的作用、用途等 比较：