被动语态
1.概念: 动词语态(Voice)是表示句子主语与谓语动词之间关系的一种动词形式。
动词语态有两种：主动语态（The Active Voice）和被动语态（The Passive Voice）。主动语态表示主语是动作的执行者。被动语态表示主语是动作的承受者(既主动语态的宾语是被动语态的主语）。
2.被动语态的构成式:be+过去分词
主动语态的宾语在被动语态中作主语
We study English. English is studied by us.
3.各种时态的被动语态
4.何时使用被动语态呢？
(1)行为主体不明确，不必说出或者无法说出动作的执行者时。
Football is played all over the world．
(2)不易找到或根本就不可能找到动作的执行者时。
My bike was stolen.
(3)汉语中含有“据说”、“据悉”、“有人说”、“大家说”等时。
It is said that one day he climbed to the top of a house.
It was reported that her mother died of SARS.
众所周知……It is well known that…
据推测说……It is supposed that…
(4)汉语中含有“被”、“由”等词时。Tina is asked to come by Paul．
(5)某些句子习惯上用被动语态。He was born in October, 1989．
5.一般将来时的被动语态
结构：will be done will not be done
1.The 2008 Olympics will be held in Beijing, China.
6.一般将来时被动语态的谓语主要有三种构成形式：
①shall / will（shall主要用于第一人称，will可用于各种人称）+ be + 及物动词的过去分词
②am / is / are + going to + ____+及物动词的过去分词
③am / is / are + ________ +及物动词的过去分词。
★一般将来时被动语态的否定形式是在shall / will, am / is / are后加not
一般疑问句形式是将shall / will或am / is / are提前至句首。
