高二 人教版 英語 選擇性必修三 第二單元《Lesson 3 Discovering Useful Structures Infinitives as the Subjects》 課件

HEALTHYLIFESTYLELesson3DiscoveringUsefulStructuresInfinitivesastheSubjects高二—人教版—英語—選擇性必修三—第二單元

LearningobjectivesAfterthislesson,youwillbeableto:1.understandtheformsandfunctionsofinfinitivesasthesubjects;2.usetheinfinitivesflexiblyandauthenticallyintherealsituations;3.furtherdiscusshowtoformahealthylifestyleusinginfinitivesofalltypes.Tochangebadhabits

isnevereasy.圖片來自教材圖片來自教材圖片來自教材Lookatthefollowingsentencesandpayattentiontotheitalicizedinfinitives.subject主語subject主語subject主語subject主語Itisnevereasytochangebadhabits.Tip1：將形式主語______置于句首，____________置于句末，可以避免句子頭重腳輕、結(jié)構(gòu)失衡。Changethesentencestructures.it動詞不定式Changethesentencestructures.Tofinishmymother’ssurgerytookthesurgeonthreehours.Toshaveofftheirbeardsisrequired(formen).Todisturbyourneighbourswithloudmusiclastnightwasnotpolite.Itisnevereasytochangebadhabits.Task1:Findmoreinfinitivesasthesubjects.

Page14~151234561.However,duringthisperiod,itcanbeeasyforsomeofthemtoformbadhabits.2.Topreventharmfulhabitslikethesefromdominatingateenager'slifeisessential.3.Tochangebadhabitsisnevereasy,evenwithmanyattempts.

4.Afterall,itisnoteasytobreakbadhabits.

Itisessentialtopreventharmfulhabitslikethesefromdominatingateenager’slife.Itisnevereasytochangebadhabits,evenwithmanyattempts.Changethesentencestructures.However,duringthisperiod,toformbadhabitscanbeeasyforsomeofthem.Afterall,tobreakbadhabits

isnoteasy.TranslatethesentencesfromEnglishtoChineseandthenfromChinesetoEnglish.1.However,duringthisperiod,itcanbeeasyforsomeofthemtoformbadhabits.

但是，在此期間，他們中的一些人很容易養(yǎng)成不良習(xí)慣。2.Topreventharmfulhabitslikethesefromdominatingateenager'slifeisessential.

防止像這樣的有害習(xí)慣主宰青少年的生活是至關(guān)重要的。3.Tochangebadhabitsisnevereasy,evenwithmanyattempts.

改變壞習(xí)慣絕非易事，即使嘗試了很多次。

4.Afterall,itisnoteasytobreakbadhabits.

畢竟，要改掉壞習(xí)慣并不容易。

Tip2:

動詞不定式作主語時，謂語動詞常用__________。

Tochangebadhabits

isnevereasy.Tohelpothersgivesapersonsatisfaction.Topreventharmfulhabitslikethesefromdominatingateenager’slifeisessential.Task2:Observeandexplore.單數(shù)圖片來自網(wǎng)絡(luò)Itwilltakeanutritionspecialistanhourtomakeabalanceddietmenuforyou.Itisusefultoturntoafitnessconsultantforadvice.Itisdangeroustotakeillegaldrugs.Itisharmfultoskipbreakfasttoooften.【Practice】

Useinfinitivesasthesubjects.

Togethealthyandgetridofbadhabits,sometimesitisalsoagoodideatoget

professionalhelp.

Itwilltakeanutritionspecialist

anhour

tomakea

balanceddietmenuforyou.

Itisalso

usefultoturntoafitnessconsultantfor

advice.

Youcanalsohelpyourselfwithsome

commonsense.

Forexample,

itis

harmfultoskipbreakfasttoooften.

It

isimportanttoavoidpassivecigarette

smoking.

And,

ofcourse,

itisdangerous

totakeillegaldrugstoo.Suggestedanswers：Task3:Summarizethesentencepatternswith“it”andwithinfinitivesasthesubjects.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.Tojointhepeople’sLiberationArmy,itisrequiredformentoshaveofftheirbeards.Itwasnotpolite(ofyou)todisturbyourneighbourswithloudmusiclastnight.Itisimportanttoavoidpassivecigarettesmoking.Itwilltakeanutritionspecialistanhourtomakeabalanceddietmenuforyou.Asachef,itwasmydutytocook,soItriedtovarythemealsinwhateverwayIcould.(Textbook,Page104)Itcanbeeasyforsometeenagerstoformbadhabits.(Textbook,Page104)Tip3:

Sentencepatternswith“it”andinfinitivesasthesubjects①It+is/was+________+________sb+todo②Itis/was+________+todo③It+takes/took/willtakesb.+____________+todo④

It+is/was________+forsb+todo

Tip3:Sentencepatternswith“it”andinfinitivesasthesubjects①It+is/was+________+________sb+todo②Itis/was+________+todo③It+takes/took/willtakesb.+____________+todo④

It+is/was________+forsb+todo

adj.for/ofn.sometimeV-ed【Practice】Usethecorrectwordstofillintheblanks.Itissmart____youtoturntoafitnessconsultantforadvice.Itisdangerous____youtotakeillegaldrugs.offorTip4:

在

It+is/was+形容詞+todo的句式中,當(dāng)該形容詞用以表示todo的特征時，使用

Itis/was＋adj.＋____+sb.+todo；當(dāng)該形容詞用來表示不定式的邏輯主語(sb.)的性質(zhì)、特征或品德時，使用

Itis/was＋adj.＋____+sb.+todo。forofTip5:

動詞不定式可與疑問詞when、where、how、what、which、who等組合，構(gòu)成___________，在句中可作______、______和______。不定式短語Task4:Observeandexplore.Whentostart

hasnotbeendecidedyet.DoyouknowwheretofindTom?Mymainconcernishowtogetthereontime.subject主語object賓語predicative

表語主語賓語表語【Practice】Usethecorrectformsofthewordstofillintheblanks.When________(start)hasnotbeendecidedyet.How________(use)thecomputeristhequestion.Ithasbeendecidedwhere________(spend)ourwinterholiday.tostarttousetospendUsethecorrectformsofthewordstofillintheblanks.________(read)aloudisgoodforyourEnglishlearning.Itisquitenecessary________(read)itagain.________(see)istobelieve.________(see)isbelieving.拓展:todoasthesubjectVS

doingasthesubjectReadingtoreadToseeSeeingTip6:

動詞不定式和動名詞作主語的區(qū)別：_______作主語特指一次性的、具體的動作；_______作主語泛指一般的或習(xí)慣性的動作。且作主語和表語的不定式或動名詞需保持________。tododoing一致圖片來自網(wǎng)絡(luò)Healthylifestylecontributestoourfitness.圖片來自網(wǎng)絡(luò)圖片來自網(wǎng)絡(luò)Butmanypeoplehavetheproblemofoverweight.圖片來自網(wǎng)絡(luò)beincontrolofdecideonbeginwithmakingchoicesmadeupmymindHowcanweloseweight?EathealthilyDoexerciseregularlyDrinkenoughwaterSleepenoughSticktoahealthylifestyle圖片來自網(wǎng)絡(luò)Task5:Findmoresentenceswithinfinitives.

Page14~15Theymustlearntorecognisebadhabitsearlyandmakeappropriatechanges.Wemakeachoicetodosomething,andthenwerepeatitoverandoveragain.Therewardmakesusmuchmorelikelytocontinuethehabitcycle.Tofacilitateapositivechangeinourbadhabits,wemustfirstexamineourbadhabitcyclesandthentry

toadaptthem.Forexample,whenwecometoanescalator(cue),ournormalroutineis

torideit.Toreachthegoalofchange,apersonmustshowsomedisciplineandrepeatedlytakemanysmallsteps.object賓語attribute定語complement補足語adverbial狀語object賓語predicative表語adverbial狀語Tip7:

動詞不定式可以在句中作______、______、______、______、______、________的成分。主語賓語表語定語狀語補足語Inthislesson,wehavelearnt

1.theformsandfunctionsoftheinfinitivesusedassubjects;2.howtouseinfinitivesinrealsituations;3.whattheinfinitivesfunctionasinsentences.Summary

Homework

1.FinishtheexerciseonWorkbookPage69.2.Useinfinitivestotalkabouthealthylifestyle.3.Reviewwhatyouhavelearnedabouttheinfinitives.THANKYOU!Lesson3DiscoveringUsefulStructures答

疑

課高二—人教版—英語—選擇性必修三—第二單元

HEALTHYLIFESTYLEAgroupofstudentsarechatting

afterclass.

Completethe

conversationswiththecorrect

formsofthephrasesinthebox.eatagoodbreakfastgetyourparents’permissionhangoutwithfriendsbalanceworkandpersonallife1)A:

I’mthinkingaboutridingamotorbiketo

school.

Whatdoyouthink?

B:

Oh?

Well,

Ithinkit’snecessary_______________________first.2)A:

Howcomeyoufaintedsuddenly

yesterday?

Didn’tyoueatanything

inthe

morning?

B:

I’monadiet.

A:

That’ssobad!

Youknowit’simportant____________every

morning.togetyourparents’permissiontoeatagoodbreakfastAgroupofstudentsarechatting

afterclass.

Completethe

conversationswiththecorrect

formsofthephrasesinthebox.eatagoodbreakfastgetyourparents’permissionhangoutwithfriendsbalanceworkandpersonallife3)A:

IoftenseeyouaroundCentralPark.

B:

Yes,

I

like____________________thereevery

weekend.

Weusually

play

ballgames.4)A:

Ihearthatthenewheadmasterhastoo

manythingstodo.

B:

Yes.

Itwillbeabigchallengeforhim__________________.hangingoutwithmyfriendstobalanceworkandpersonall