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新人教版选修七 Unit Robots-Grammar不定式[课件].ppt


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Revision of The passive Infinitive 不定式语法?不定式的时态和语态不定式有时态和语态的变化, 时态共四种,即一般式、完成式、进行式和完成进行式。语态分为主动语态和被动语态,如下表所示。/ to have been doing 完成进行式/ to be doing 进行式 to have been done to have done 完成式 to be done to do 一般式被动语态主动语态语态时态一、一、不定式的被动形式有下列用法不定式的被动形式有下列用法 : It is an honour for me to be asked to speak here. : She asked to be sent to work in Xinjiang. 一当不定式的逻辑主语是不定式所当不定式的逻辑主语是不定式所表示的动作的承受者时,不定式一般表示的动作的承受者时,不定式一般要采用被动形式。要采用被动形式。. : He wanted the letter to be typed at once. She didn ’ t like herself to be praised like that. : The books are not allowed to be taken out of the room. : Are you going to the meeting to be held in the teachers ’ office? : She was too young to be assigned such work. 二、不定式有时还可以有完成式的被动二、不定式有时还可以有完成式的被动式,在句中作主语、宾语、定语,或者式,在句中作主语、宾语、定语,或者构成复合宾语、复合谓语等,如: 构成复合宾语、复合谓语等,如: It is a good thing for him to have been criticized. (主语) She preferred to have been given heavier work to do. (宾语)) He thought it an honour to have been invited to the party. The book is said to have been translated into many languages. She was the first woman to have been elected to such a post. 三、不定式的主动形式表示被动 there be 结构中。例如: There is a lot of homework to do . (也可用 to be done) There is no time to lose (to be lost). 三、不定式的主动形式表示被动 “n/ pron + be + adj + to do ”结构中。常用的形容词有 easy , difficult , hard , impossible , nice , pleasant , light , heavy , interesting , important , expensive , cheap , fit, dangerous 等。例如: He is hard to convince. He is an impossible person to work with .

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  • 时间2017-02-16