被动语态精讲.ppt

《被动语态精讲.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、goWhocutthistomato?Whathappendwiththetomato?someonecutit.Itwascutbysomeone.英语的两大语态：主动语态和被动语态A.主动语态中主语是谓语动词的发出者。宾语是谓语动词的对象。B.被动语态中主语是谓语动词的承受者(动作的对象)。(把主动语态改为被动语态也就是把主动句中的宾语改为被动句的主语，这是最关键的着眼点，同时谓语动词作相应的变化。)被动语态的谓语构成:助动词be＋动词过去分词(根据句子的主语和时态，助动词be有am,is,are,was,were,been几个形式变化。)什么时候

2、要用被动语态呢？在下列三种情况之一要用被动语态：①不知道动作的执行者是谁，用被动语态。②没有必要指出谁是动作的执行者，用被动语态。③需要强调动作的承受者时，用被动语态。主动句中谓语动词的发出者由by引出，作为by的宾语，也可以省略。请看以下主动语态和被动语态结构的转换：主动语态:主语＋谓语＋宾语被动语态:例：Wecleanourclassroomeveryday.（主动）[注意]①把主动语态改为被动语态时，句子的时态不能变。如上例，所给的主动句子是一般现在时，改为被动语态时，也要用一般现在时。②如果主动句中的主语是人称代词，改为被动句时作介词by的宾语

3、，要用宾格。如上例中的主语we改为us。主语＋＋by+宾语be+过去分词Ourclassroomiscleanedbyuseveryday（被动）各种时态的被动语态一般现在时：IamcalledJimmy.Footballisplayedallovertheworld.ThecarismadeinChina.Knivesareusedforcuttingthings.am/is/are+过去分词各种时态的被动语态一般过去时：Abankwasrobbedyesterday.Thekitewasmadebythem.Theclotheswerewashed

4、bymymother.Manyhouseswerewashedawayintheflood.was/were+过去分词各种时态的被动语态一般将来时：Theworkwillbefinishedin2days.Weshallbegivenawarmwelcome.IamgoingtobesenttoAmerica.ThepaintingisgoingtobesoldtoCanadaTreesaregoingtobeplantedbythemtomorrow.will/shallbe+过去分词am/is/aregoingtobe+过去分词各种时态的被动语态现

5、在进行时：Iambeingaskedsomequestionsnow.Aspeechisbeinggiveninthehall.TheclothesarebeingwashedbyJane.am/is/arebeing+过去分词各种时态的被动语态过去进行时：Aletterwasbeingwrittenbyherat2pmyesterday.Themealwasbeingcookedbymymotherthistimeyesterday.Themenwerebeingquestionedbythepoliceman.was/werebeing+过去分词各

6、种时态的被动语态现在完成时：Theworkhasbeenfinishedbythem.Thehousehasbeenbuilt.Hissheephavebeenfound.Thebookshavebeenkeptsincelastweek.have/hasbeen+过去分词情态动词+be+过去分词Thetreesshouldbewateredatonce.Thebookscanbekeptfor2weeks.Ourenvironmentmustbeprotectedwell.Thehomeworkmustbehandedin.Practicebreak

7、fastpreparemymotheroftenBreakfastisoftenpreparedbymymother.PracticeflowerswatergirlnowTheflowersarebeingwateredbythegirlnow.PracticebikebuymyfatherlastmonthThebikewasboughtbymyfatherlastmonth.PracticehomeworkdoKatefrom8:00to9:00yesterdayThehomeworkwasbeingdonebyKatefrom8:00to9:0

8、0yesterdayPracticeroadscleanmachinesinthefuture