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【被动语态(一)】
被动语态
在英语中，须通过动词的某种形式来表明句子的主语是动作的执行者还是动作的承受者，前一种句子是主动句，后一种是被动句。
英语的动词有两种语态形式，即主动语态和被动语态。如果主语是动作是执行者，谓语动词用主动语态。如果主语是动作的对象，谓语动词用被动语态。如：
They build this school.
They school is built by them.
1、被动语态的构成
“助动词 +(及物动词的)过去分词”构成动词被动语态的形式。助动词be有人称、数和时态的变化，其变化规则与be作为系动词的变化完全一样。如：
This kind of TV set is made in Guangzhou.(一般现在时)
The thief was arrested.(一般过去时)
A new road is being built outside my house.(现在进行时)
The man was being questioned by the police.(过去进行时)
Your wallet has been found.(现在完成时)
By the time we got there. The work had been finished.(过去完成时)
My sister would be taken care of by grandma.(过去将来时)
Your watch will be repaired.(一般将来时)
难点：
在英语里，有一些动词是不及物动词，后面不能跟宾语，所以没有被动语态。以下动词只有主动语态，没有被动语态。
appear, die, happen, fall, arrive.
2、五种时态的被动语态举例
① 一般现在时
A lot of books are kept in our school library.
Radio is used in everyday life.
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