Book7 unit2动词不定式被动语态形
一、复习各种时态的被动语态
★ 被动语态的基本结构: be+ done
（以 the book , publish 为例）
一般现在/过去时：
The book is/ was published.
一般/过去将来时:
The book will/would be published.
The book is/was going to be published.
现在/过去进行时：
The book is/was being published.
现在/过去完成时:
The book has/had been published.
情态动词：
The book can/could/may/might…be published.
1）一般式：（not/never ）to be done
2）完成式：（not/ never） to have been done （表示不定式动作发生在谓语动词之前）
三、▲通常在believe, suppose, say, report等动词构成的句子中可以进行主动语态到被动语态以及被动语态和动词不定式的转换.如:
They say that Mike is sick in bed.
据说麦克卧床不起.
People believe that he was killed.
大家相信他被杀了.
四、 当不定式的逻辑主语是不定式所表示的动作的承受者而非发出者时，不定式一般要采用被动形式(to be done).
语法功能：
1．作主语：
It is an honour for me to be asked to speak here.
2．作宾语：
She asked to be sent to work in Xinjiang.
3．构成复合宾语：
He wanted the letter to be typed at once.
She didn’t like herself to be praised like that.
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