何时运用被动语态:
(1)强调动作的接受者:America was discovered by Columbus.
(2)不知谁是动作的执行者:You are wanted on the phone.
(3)作客观说明:It is said that the meeting has been put off. (经典句型)
主动变被动的基本方法:(说起来容易,掌握起来需要用心!)
(1)主动语态中的宾语变为被动语态的主语。
(2)谓语动词变为由“be + 过去分词”的形式,配合时态作相应变化。
(3)主动语态主语置于介词 by之后,如无必需,则省略。
(4)不及物动词没有被动语态。
现 在 do (does) →am / is / are + done
We keep the piano in the living-room.
The piano is kept in the living-room.
过 去 did→was / were + done
They built the bridge in 1980.
The bridge was built in 1980.
将 来 will/shall do → will/shall + be + done
He will read the book tomorrow.
The book will be read tomorrow.
现在完成 have/has done → have/has + been + done
We have delivered the newspaper.
The newspapers have been delivered (by us).
过去完成 had done → had been done
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