主动语态如何改成被动语态.ppt

* 外研版 初三 (上) Module 4 Unit 3 Language in use Language practice Paper and printing have been used for ages. The battery hasn’t been changed for a couple of months. Has it been published yet? 现在完成时的被动语态: have/has (not) been +过去分词 Information can be kept on CD-ROMs. Books could only be produced one at a time. Can books be replaced by computers? 情态动词的被动语态: 情态动词(not)+ be +过去分词 当我们不知道谁是动作的执行者, 或者没有必要指出谁是动作的执行者时, 或者只需强调动作的承受者时, 要用被动语态。 被动语态:主语是动作的承受者 。 Conclusion (一) 一般现在时— am／is ／ are +动词的过去分词 一般过去时— was／were +动词的过去分词 情态动词— aux.v. (must／can／could／may… + be +动词的过去分词 被动语态的构成：be +动词的过去分词 现在进行时—— be(am、is、are)+being +动词的过去分词 一般将来时—— will be／be going to be +动词的过去分词 现在完成时—— have／has +been+动词的过去分词 过去进行时 现在进行时 一般过去时 一般现在时 被动语态结构 时态 am/is/are +done was/were+done am/is/are being+ done was/were being + done 过去完成时 现在完成时 过去将来时 一般将来时 shall/will be+ done would be+ done have/has been+ done had been+ done 主动语态如何改成被动语态？ 主动语态的宾语改成被动语态的主语。 2. 主动语态的谓语动词改成被动语态的谓语动词。do→be done 3. 注意保持时态和人称的一致。 4. 带双宾的谓语动词有两种改法。当把直接宾语改成主语时，谓语动词后必须加适当的介词: to for. Conclusion (二) 如: give →be given to此类动词还有: pass show send… 再如: buy→be bought for此类动词还有: make draw cook mend… 5. 一些动词不定式在主动语态中省略to作宾语补足语, 改成被动语态时, to必须还原。 注: 1. 不及物动词（vi.)不用被动语态。如: happen、take place 、appear、disappear… 1. My uncle gave me a gift on my birthday. 2. We often hear him play the guitar． I was given a gift on my birthday. A gift was given to me on my birthday. He is often heard to play the guitar 几种特殊结构 注意: see, watch, hear, notice, feel, make, listen to, look at等动词/短语后作宾语补语的不定式都不带to；但改成被动语态后必须带to。 A recorder is used in our English class every day. Let’s practice! recorder English class use …for Often play Football is played all over the world. A camera is used for taking photos. rob yesterday send up last year A man-made satellite was sent up into space last year. A bank was robbed yesterday. must plant cover with in a few years’time The tree must be planted on the ground. The ground will be covered with trees in a few