动词的语态

动词的语态 ：

语态是动词的一种形式，表示主语和谓语的关系。语态有两种：主动语态和被动语态。
主语是动作的发出者为主动语态；The cat caught the mouse.
   主语是动作的接受者为被动语态。被动语态由“助动词be+及物动词的过去分词”构成。助动词有人称，数和时态的变化，起变化规则和be作为连系动词时完全一样，以ask为例说明被动语态的构成。
一般现在时  am/ are / is asked
一般过去时  was/ were asked
一般将来时  shall /will be asked
现在进行时  am/ are/ is being asked
现在完成时  have/ has been asked
过去进行时  was/ were being asked
过去将来时  should/ would be asked
过去完成时  had been asked

   被动语态的疑问句是将肯定句将肯定句中的第一个助动词移到主语之前，否定句是在第一个助动词后面加not。如：
   肯定句：They are made in China.
   疑问句：Are they made in China?
   否定句：They are not made in China.