Unit 1 Discover useful structures 语法精讲课件 【高效识记+延伸拓展】高中英语人教版（2019）选择性必修第三册

语法精讲语法精讲语法精讲Unit1Whydoeshecomesoearly?DiscoveryHisaimistotakethefirstbus.不定式充当表语主动将要1结构am/is/are/was/were+不定式Thepurposeofeducationistodevelopafinepersonalityinchildren.2功能（1）表示目的Thenextstepistounderstandexactlywhatconveysinthecontemporarypainting.（2）表示事态发展的结果、预期的结果及预言Youmustspeakout，ifwearetoremainfriends.Webelievemanistoliveabetterlifeinthefuture.

不定式作表语（3）用于第一人称疑问句，表示征求意见WhatamItodoifIcan’tgainentrytothefinal?（4）用于被动语态，相当于should，具有情态意义Thesebooksofgreatvaluearenottobesold.（5）表示“安排、命令、决定、劝告、意愿、禁止”等IamtosetoutforChinanextweek.下周我要动身到中国去。（安排）Youaretohaveaface-to-facetalkwiththem.你应该和他们当面谈一谈。（劝告）Childrenarenottosmoke.儿童不准吸烟。（禁止）

【学法点拨】

动词不定式作表语的两种特殊用法（1）不定式短语tolet，toblame，toseek等常用主动形式表示被动含义Thehouseistolet.Whoistoblameforthepopulationdeclineofthetigersinthatarea?Thereasonforglobalwarmingisnotfartoseek.全球变暖的原因不难找到。（2）当主语部分含有动词do的某种形式时，作表语的不定式可省略toAnythingwecandoisguaranteeitwillbedeliveredontime.Intheeveningtheonlythinghedidwasreadontheblog.Readthesesentencesandfillintheblanksusingthecorrectwordsfromthetextonpages2and3.Discusswithyourpartnerthefunctionoftheitalicizedinfinitives.1Perhapsthebest______tounderstandWesternartistolookatthedevelopmentofWesternpaintingoverthecenturies.2DuringtheMiddleAges,the_________ofWesternartwastoteach

peopleaboutChristianity.3Inthiswork,Monet's_____wastoconveythelightandmovementinthescene…4________________________wasnolongershowreality,butinsteadtoaskthequestion,“Whatisart?”waypurposeaimWhattheyattemptedtodoMatchthesentencehalvesandunderlinethekeywordsofthesubjectineachsentence.1.Theyoungsinger’sintentionofperformingthesongwas2.Thebestwaytodobusinessis3.WhatthesurvivorsattemptedtodowasA.tobuildtrustbetweenyouandyourclient.Btoachievepermanentpeacebetweentheirtwocountries.C.tobuildamemorialtotheheroeswhosavedtheirlives.D.tosharehisloveforrockmusicwithhisfans.adj.永久的;长久的adj.纪念的n.纪念碑;纪念品4Themainpurposeofarteducationinschoolsis5Theaimofthetwoleadersattheconferencewas6Forahumbleperson,oneofthehardestthingsmightbe7Whenyouarefacedwithaseriousdecision,mysuggestionis8Themotherbelievesherdutyis9AllhewantedafteratiringdaywasBtoachievepermanentpeacebetweentheirtwocountries.E.tobeleftalone.F.tocriticize

otherpeople.G.toinspirestudentstobecreative.H.tolistentoyourowninnervoice.I.toraisehersontobecomeamanwithanoblemindandagenerousheart.adj.谦逊的;虚心的v.批评;评价1.句子主语是不定式时，系动词后可接不定式作表语，解释主语描述的行为或说明该行为带来的结果。egTogothereatthishourwastoriskone’slife.Toaskhimsuchquestionsistoirritatehim.动词不定式用作表语2.不定式作表语时，能担当句子主语的名词有限，多用于表示某种情形或状况：advice,aim,custom,business,desire,difficulty,duty,experience,habit,happiness,hope,idea,intention,job,method,plan,principle,problem,purpose,reason,risk,role,task,thing,wish等。根据需要，有时不定式前可添加疑问代词或疑问副词，what,who,how,when,where等。egMyambitionistobecomeascientist.

Hishabitistogetupearly.

Theproblemwashowtobegin.3.当主语含定语从句且其先行词为代词all或形容词最高级theleast,themost时：+系动词+不定式作句子的表语。egAllhewantedwastobeleftalone.

TheleastIcanexpectistohavethisdayalltomyself.4.当不定式作表语时，句子主语可以使what引导的主语从句。

egWhatIwanttodonowis(to)havearest.3.Medicalexpertssaythemosteffectivewaytopreventthespreadofdiseaseisforpeople________(wash)theirhandswithsoapandwater.4.Thenextstepis________surethatyouknowexactlywhatisrequired.5.Thepurposeofeducationis__________(develop)afinepersonalityinchildren.towashtomaketodevelop1.Themottoofthelittleboywhowassufferingfromamusclediseasewas_______(live)onedayatatime.2.Itisyou,includingyourcousin,that____________(blame)forthelossofthegoldenchance.tolivearetoblameCompletethesentences.1.要是他们问我这个问题，我该怎么回答呢？________________iftheyaskmethequestion?2.她应该为所发生的事情受到责备。

_________________forwhathashappened.3.你要做的事情是面对现实。

Thethingforyoutodo________________.4.我筋疲力尽，想能马上就去度假。

Iamexhaustedandtiredout.WhatIwanttodo__________

__________.WhatamItosaySheistoblameisfacethefactsistakingaholiday1.Herworkis___________(look)afterthechildren.2.Myaimis_________(go)toTsingHuaUniversity.3.Sheseemed__________(think)abouttheproblem.4.Theyappeared_________(agree)withwhatwesaid.tolook不定式作表语练习1：togotothinktoagree5.Supposeyouare

（be）ajournalistforChinaDaily，doyouknowwhatkindsofjobstheyhav 6.Youare

（reward）ifyouhavemadeabreakthrough.7.Throughmyyearsofschoollife，I’velearnedthatifweare______

（make）adifferenceinlife，it’sofgreatimportancethatweshouldbeginwithsmallthings.8.Thestudentstrustherverymuch；asaresult，heradviceis

_______________（influence）theirdecisions. tobetoberewardedtomake

toinfluence不定式作表语练习2：运用不定式完成句子。Theyoungsinger’sintentionofperformingthesongwas___________________________.Thebestwaytodobusinessis_________________________________.

Whatthesurvivorsattemptedtodowas___________________________________.tosharehisloveforrockmusicwithhisfans.和他的歌迷们分享他对摇滚音乐的热爱。tobuildtrustbetweenyouandyourclient.建立你和客户之间的信任。建造一座纪念碑纪念那些拯救了他们生命的英雄们。tobuildamemorialtotheheroeswhosavetheirlives.4.Themainpurposeofarteducationinschoolsis_____________________________.5.Theaimofthetwoleadersattheconferencewas____________________________________________.6.Forahumbleperson,oneofthehardestthingsmightbe____________________________.toinspirestudentstobecreative.启发学生有创造力。toachievepermanentpeacebetweentheirtwocountries.在两国之间建议永远的和平。批评其他人。tocriticizeotherpeople.7.Whenyouarefacedwithaseriousdecision,mysuggestionis_____________________________.8.Themotherbelievesherdutyis_________________._______________________.9.Allhewa