Unit 5 Power of Ideas Section A Grammar Focus 课件 2026-2027学年人教版英语九年级上册

Unit5PowerofIdeasGrammarFocusLet’slearnIwashmyclotheseveryday.Myclothesarewashedbymeeveryday.bedoneThepassivevoiceTheactivevoiceAmini-cameraisconnectedtothefrontoftheglasses.Theoilandsaltarealsoaddedbythemachineitself.Toys,chairs,tables,andevenhousescanallbemadebythe3Dprinter.AradiomessagewassentacrosstheAtlanticOceanforthefirsttimein1901.Readthesentences.Circletheverbsinthepassivevoice.4aTheactionisdonetothesubject.主语是动作的承受者(thereceiver)被动语态句子有两类：1.带施事者:含by的短语;

2.不带施事者:不含by短语。

Thedefinitionofpassivevoice被动语态是动词的一种形式,主语与动作之间是被动关系,主语是动作的承受者(动作作用在主语身上)。

Thestructureofthepassivevoicebe+done(动词的过去分词)Theuseofthepassivevoice肯定句一般现在时：主语+am/is/are+done(+by+施事者).一般过去时：主语+was/were+done(+by+施事者).否定句一般现在时：主语+am/is/are+not+done(+by+施事者).一般过去时：主语+wasn’t/weren’t+done(+by+施事者).一般疑问句一般现在时：—Am/Is/Are+主语+done(+by+施事者)?

—Yes,主语+am/is/are.

—No,主语+am/is/are+not.一般过去时：—Was/Were+主语+done(+by+施事者)?

—Yes,主语+was/were.

—No,主语+wasn’t/weren’t.特殊疑问句一般现在时：疑问词+am/is/are+主语+done(+by+施事者)?一般过去时：疑问词+was/were+主语+done(+by+施事者)?肯定句主语+情态动词+be+done(+by+施事者).否定句主语+情态动词+be+not+done(+by+施事者).一般疑问句情态动词+主语+be+done(+by+施事者)?特殊疑问句疑问词+情态动词+主语+be+done(+by+施事者)?含情态动词的被动语态Whendoweusethepassivevoice?(1)不知道或不必提及动作的执行者

eg:Thefirstelectricrailwaywasopenedin1890.(2)强调动作的执行者

eg:Thebeautifulhatwasgivenbymygrandmother.(3)强调动作的承受者

eg:TheTVwasinventedafterthecar.(4)动作的执行者是无生命的事物

eg:Thebridgewaswashedawaybyflood.(5)常用于陈述客观事实，一般用在科技文章或新闻报道中

eg:Moreresearchneedstobedone,ifthisproblemistobesolved.(6)部分动词短语/句型在习惯上只用于被动语态

eg:Theroadiscoveredwithsnow.

不及物动词及词组没有被动结构,如:happen、takeplace、cometrue、runout、fallasleep等。eg:Ourdreamwillsurelycometrue.

write、wash、sell、read、clean等可作不及物动词,用主动语态，和well、easily等副词连用,

含有被动意义。eg:Thiskindofskirtsoldwellhere.

look、sound、smell、taste、feel、get、turn、become、seem等系动词后接形容词作表语时,常用主动形式表示被动含义。eg:Thiscupoforangejuicetastesstrange.特殊情况

动词need,want以及短语beworth等后接动词-ing时,用主动形式表示被动含义。eg:Myflowersneedwatering.

主动句中感官动词see/hear/watch/feel等和使役动词make/let/have

等后跟省略to的动词不定式,变为被动语态时应加上不定式标志to。eg:Isawhim

leave

theroom.→Hewasseen

toleave

theroom.特殊情况•Itissaidthat...(据说......)•Itisbelievedthat...(人们相信......)•Itisknownthat...(众所周知......)•Itisreportedthat...(据报道......)•Itisexpectedthat...(预计......)(1)Thetelephone____________(invent)byAlexanderBellin1876.(2)Peopleallovertheworld____________(connect)toeachotherthroughtheinternet.(3)Theword“robot”_____________(introduce)forthefirsttimeinaplayin1920.(4)Itwasn’tsupposedtomakesuchaloudnoisewhenthebutton____________(press)tostartthemachine.(5)Itisbelievedthattheworld’soldestwheel__________(find)inEasternEurope.wasinventedareconnectedwasintroducedwaspressedwasfoundCompletethesentenceswiththecorrectformsoftheverbsinbrackets.4bWhichrailwayisthepictureshowing?TheQinghai-XizangRailway•Howmuchdoyouknowaboutthisrailway?Completethepassagewiththecorrectformsoftheverbsinbrackets.TheQinghai-XizangRailwaywascompletedin2006.It_________(connect)XiningtoLhasa,ahugedistanceof1,956kilometres,anditisthehighestrailwayintheworld,reaching5,072metresabovesealevelatTanggulaPass.Thebuildingoftherailwaywasagreatchallenge.Creativeideas__________(need)tosolvedifferentproblems.Insummer,thetoplayerofthefrozengroundwouldmeltandbecometoosofttobuildon,sopipes__________(use)tokeepthegroundhard.However,insomeplaces,itwasimpossibletobuildtherailwayoverthefrozenground,sotunnelshadto__________(create)instead.Insomeotherplaces,bridges__________(build)tokeeptherailwayupabovetheground.Thesebridgesareanimal-friendlyand________(allow)animalstopassunderthetracks.connectswereneededwereusedbecreatedwerebuiltallow4cCompletethepassagewiththecorrectformsoftheverbsinbrackets.Asanimportantandsuccessfulproject,therailwayhas__________(increase)tourismandeconomicdevelopmentinthearea.Thelessonslearntandexperiencegainedfrombuildingthisrailwaywillhelp___________(improve)transportinothersimilarplacesintheworld.increased(to)improve4cReadthetextagainandanswerthequestions.

•buildonfrozenground•thetoplayerofthefrozengroundwouldmeltandbecometoosofttobuildonItshowsthecreativityofChineseengineeringandtechnology.ItreflectstheChineseculturalspiritofbenefitingthepeople.

Chinesepeoplearecreative,determined,andnevergiveupinthefaceofchallenges.Theycansol