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新教材高中英语人教版选必三UNIT2HEALTHYLIFESTYLEDiscoverUsefulStructures
目录页contentsLead-inⅠⅣObserveandDiscoverⅡⅢPracticeandApplyHomework
ⅠLead-in
LeadinTask1Readthefollowingsentencesandanalyzewhatpartdoestheunderlinedpartserveasineachsentence?1.Tochangebadhabitsisnevereasy.2.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.3.TojointhePeople’sLiberationArmy,itisrequiredformentoshaveofftheirbeards.4.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.主语
LeadinTask2Comparethefollowingsentencesandfindthedifferencesofthesubjects.1.Tochangebadhabitsisnevereasy,evenwithmanyattempts.2.Topreventharmfulhabitslikethesefromdominatingateenager’slifeisessential.3.Afterall,itisnoteasytobreakbadhabits.4.However,duringthisperiod,itcanbeeasyforsomeofthemtoformbadhabits.5.How to use the computer is a question.6.When to go therehas not been decidedyet.
Leadin动词不定式作主语有三种形式：1.直接放在________作主语；2.为了保持句子平衡，用________作形式主语，放在句首，把真正的主语—动词不定式置于句后；3.和_________构成短语作主语。句首it疑问词Summary
IIObserveandDiscover
ObserveandDiscover1.Toseeistobelieve.2.Todothisistocutthefoottofittheshoe.3.Tosayisonethingandtodoisanother.4.Tomakeadetailedplanisagoodideatomakeitsuccessful.从位置上看，动词不定式作主语，通常放在句首。当句子主语和表语都是非谓语时，通常要_________，例如：Toseeistobelieve.=Seeingisbelieving.保持一致Observation1Discover1
ObserveandDiscover1.Forhimtoadmithismistakesisnoteasy.2.Forustofinishthecompositioninaquarterofanhourisreallydifficult.动词不定式作主语可以带上自己的____________，一般用for/of短语来表示。但此时多使用形式主语it来引起，使得句子保持平衡。例如，第2句可以改为：Itisreallydifficultforustofinishthecompositioninaquarterofanhour.逻辑主语Observation2Discover2
ObserveandDiscover1.Tobeworkingalldaylongisabore.2.Tohavemadethesamemistaketwiceisunforgivable.3.Toloveandtobelovedisthegreathappiness.动词不定式作主语可以有不同的___________形式，例如，____________，_______和_______语态。时态和语态Observation3Discover3一般进行时完成时被动
ObserveandDiscover1.Itisn’trighttotalklikethat.2.It’sdifficulttomasterEnglish.3.It’shardformetoanswerthequestion.4.Itisbettertohavelovedandlostthannevertohavelovedatall.以上四个句子有两点共同之处：1.句子的真正主语都是____________，但都使用it作形式主语；2.句子的表语都是______。动词不定式形容词it+be+adj+(逻辑主语)+todosthObservation4Discover4
ObserveandDiscover动词不定式的逻辑主语常用__________来表示，当形容词修饰动词不定式时，此时常用介词_____。当表语形容词表示不定式的逻辑主语的性质或特征时，则用介词____。1.Itisn’trightforustostophalfway.=Tostophalfwayisnotright.2.It’skindofyoutothinksomuchofus.=Youarekindtothinksomuchofus.for/of+sbforofObservation5Discover5
ObserveandDiscover1.It’sourdutytodothat.2.It’samistakenottohelpthem.3.Itmustbegreatfuntoflytothemooninaspaceship.以上三个句子的表语都是_______，它们可归纳为一个共同句式：_____________________________。名词it+be+n+todosthObservation6Discover6
ObserveandDiscover1.Ittookmemorethananhourtodomyhomeworkyesterdayevening.2.Itwilltakeusalongtimetowalkthere.3.Howlongdoesittaketogetthere?4.Howmuchdiditcostyoutosendthepackage?Observation7Discover7以上四个句子是动词不定式作真正主语，由it作形式主语引导的句子，它们的谓语是_________。它们的共同句式是________________________________________，表示某人花多少时间或金钱做某事。take/costittakes(costs)sbsometime/moneyto do sth
ObserveandDiscover1.Howtousethecomputerisaquestion.2.Wheretoputthebikesisbeingdiscussed.3.Whenandwheretohavethemeetinghasnotbeendecided.________和动词不定式构成不定式短语作主语。疑问词包括疑问代词who、whom、what、which、whose以及疑问副词when、where和how。此外连接词whether也适用。此时，疑问词+todo结构可以转化为一个________，例如：Howtousethecomputerisaquestion.=___________________________________________疑问词主语从句Howwecanusethecomputerisaquestion.Observation8Discover8
动名词作主语表示_______________的行为;不定式作主语表示_______________________动作。Furtherthinking1.______(do)morningexercisesregularlyisgoodforyourhealth.2.Itfeelsreallygood______(do)morningexercisestoday.Doingtodo经常性或习惯性具体的、一次性的或将来的Completethefollowingsentencesandcomparetheirusages.Conclusion
PracticeandApplyⅢ
PracticeandApply1.Howlongdoesittakeforyou_______(get)therebybike?2.Howmuchdiditcostyou_______(send)thepackagetoBeijing?3.It’simportant_______youtowalkaftersupper.4.It’sveryrude______youtoturnyourbacktoyourteacherandrefusetoanswer.在空白处填入1个适当的单词或括号内单词的正确形式。togettosendforof
PracticeandApply5.Tomakefriendswiththesenaughtyboys_______(be)nice.6.When______(hold)themeetinghasnotbeendiscussedyet.7.Itseemedapity_____________(waste)somuchtimeonthetaskwithoutachievingourgoal.8.Tochangeor____________(change)isaquestionwehavetothinkabouteveryday.toholdistohavewastedtobechanged
PracticeandApply1.明天是否下雨，无关紧要。2.车不用时，及时锁好很有必要。3.这个老人对蛇的怜悯导致了他的死亡。Itdoesn’tmatterwhethertorainornottomorrow.Itisnecessarytolockyourcarintimewhennotusingit.Theoldman’stakingpityonthesnakeleadstohisdeath.Fortheoldmantotakepityonthesnakeleadstohisdeath.翻译句子。
4.减少工业污染，清洁水质，花费了多年工作才完成。5.对于像这样的一家公司，雇用安保人员是标准做法。PracticeandApplyIttookyearsofworktoreducetheindustrialpollutionandcleanthewater.It’sstandardpracticeforacompanylikethisonetoemployasecurityofficer.
在空白处填入1个适当的单词或括号内单词的正确形式。Ihadavarietyofhobbies____________Istudiedincollege.Itwashardforme______(save)muchmoneytokeepmyhobbiesanditwasalsofoolish____metospendplentyoftimeonthosebecauseithasbeenmydream_____(be)adoctor.However,tobecomeadoctorrequiresmuchstudyanditwasapityforme________(leave)behindbecauseI___________(waste)toomuchtimekeepingmyunwisehobbies.PracticeandApplywhen/whiletosaveoftobetobelefthadwasted
PracticeandApplyFortunatelyImetmydearteacher,MissLiu,whoreallychangedmylifecourse.After_________(realize)mymistakes,Idecidedtomakeupforthelosttime._______(study)hardbecamemyfirsttaskthen______togetupearlyeverydayturnedtobemyhabit._____tookmetwotermstocatchupwithmyclassmatesfinally.realizingTostudyandIt
HomeworkⅣ
Homework1.Reviewwhatyouhavelearnedtoday.2.Drawmindmapsoftheinfinitive’susagesasthesubject.3.Makeupashortstory,usingtheinfinitiveasthesubjectasmanyaspossible.
