新人教版选修七 Unit 2 Robots-Grammar[语法课件].ppt

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1、RevisionofPassiveVoiceUnit2GrammarMymotherfeltalarmedwhenIhadmyhaircolouredpurple.MymotherwasalarmedwhenIhadmyhaircolouredpurple.Lookatthesentences.Isthisapassivesentence?Thoughthestructureseemslikeapassivesentence,itisnot.Apassivesentenceindicatesapassiveactionwhilethissentenced

2、escribesasituationwhensomeonehasthefeelingofalarm.“alarmed”isanadjectiveformedbyv+ed.Key!DiscoveringusefulstructuresGooverthepassivevoicebe+V+-ed/-en/-tMyhamburgerwaseatenbythedog.Thetoyismadebyhand.使用被动语态的情况1.我们不知道或没有必要说明动作的执行者是谁的时候(这时不带by引起的短语)。PrintingwasintroducedtoEuropefrom

3、China.(省略了by短语。)Look!Thereisnothinghere.Everythinghasbeentakenaway.(省略了by短语。)2.当我们出于礼貌、措辞委婉等方面的考虑不愿说出动作的执行者是谁时。Youarerequestedtogiveaperformance.Youarecordially(诚挚地)invitedtoapartytobegivenattheTeachers'Clubat3p.m.Nov.23.3.当我们强调或兴趣在动作的承受者时(这时可带by引起的短语)。Thesongwascomposed（组成;写作）by

4、astudent.Agoodtimewashadbyall.被动语态由be＋过去分词构成，be随时态的变化而变化。以give为例，各种时态的被动语态形式为：一般现在时：am/is/are＋given【例句】ThefirstsectionofNewCollegeEnglishisdesignedforspeakingpracticeandisbasedonpicturesandtopics.被动语态的构成一般过去时：was/were＋given【例句】Thesecomputersweremadeinourowncountry.一般将来时：will/shal

5、lbe＋given【例句】Shallwebeaskedtoattendtheopeningceremony?SirDenis,whois78,hasmadeitknownthatmuchofhiscollection____tothenation.(CET-41996)A.hasleftB.istoleaveC.leavesD.istobeleft本句意思为：78岁的Denis先生声明他将把他的大多数收藏品留给国家。所以leave应用一般将来时的被动形式。一般将来时可以用来betodosth来表达，因此答案为D。过去将来时：wouldbe＋given【例

6、句】Thenewswouldbesenttothesoldier'smotherassoonasitarrived.现在进行时：am/is/arebeing＋given【例句】Themachineisbeingrepairedintheworkshop.Thefifthgenerationcomputers,withartificialintelligence,are____andperfectednow.A.developedB.havedevelopedC.arebeingdevelopedD.willhavebeendeveloped本句测试点是动

7、词的时态和语态develop和perfect是两个并列的谓语动词，perfect用的是被动形式，develop也应该用被动形式，而且句子的时间状语为now，故develop应用现在进行时的被动语态，答案为C。过去进行时：was/werebeing＋given【例句】Thefeastwasbeingpreparedwhenthebirdsarrivedinthesky现在完成时：have/hasbeen＋given【例句】Swiftprogresshasalsobeenmadeincultureandeducation.过去完成时：hadbeen＋give

8、n【例句】Thehugebridgehadbeendamagedbeforeth