Unit3FascinatingParksDiscoveringUsefulStructures课件高中英语人教版选择性

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Unit3FascinatingParksDiscoverusefulstructuresLead-inIdentifythefunctionofthe-ingforminthesentencesbelow.Gettinghereisquitedifficult,soapartfromtheSamiveryfewpeoplehaveeverseenSarek.

(Para.2)Beinginsuchabeautifulandwildplacemakesmefeelblessedtobealive.

(Para.4)主语主语Lead-inEventhoughthesunisbrightlyshining,tellingwhetheritismorningornightisimpossible.(Para.1)Forhundredsofyears,lookingafterreindeer

wasawayoflifefortheSami.

(Para.3)主语主语Findmoresentenceswiththe-ingformfromthereadingpassageandstatetheirfunctions.Observe&Discover2.Gettinghereisquitedifficult,soapartfromtheSamiveryfewpeoplehaveeverseenSarek.

(Para.2)4.Beinginsuchabeautifulandwildplacemakesmefeelblessedtobealive.

(Para.4)1.Eventhoughthesunisbrightlyshining,tellingwhetheritismorningornightisimpossible.(Para.1)3.Forhundredsofyears,lookingafterreindeer

wasawayoflifefortheSami.

(Para.3)通常直接位于句首，1.动词-ing形式作主语,谓语动词用单数形式Compare&DiscoverSingingismyhobby,andtosingatmyfriend'sweddingceremonyismydream.2.动词-ing形式作主语时，多指经常性、

习惯性的动作；不定式作主语时，表示具体的或一次性的动作。TransformandObserveHikingthroughthemountainsinthepathlessSarekisgreatfun.ItisgreatfunhikingthroughthemountainsinthepathlessSarek.V.-ing形式作主语it代替V.-ing

形式作形式主语3.在一些句子结构中，为了平衡句子结构，会将作主语的V.-ing形式后移，用it来充当其,真正的主语是

。形式主语V.-ingTransformandObserve⑴It'sworth

makingtheeffort.⑵Itispleasant

workingwithyou.⑶It'snouse

cryingoversplitmilk.⑷Itwasawasteoftime

readingthatbook.it作形式主语前置，真正的主语是动词

-ing形式。但这种句子形式有一定的限制，作表语的只能是某些形容词或少数名词形容词名词TransformandObserveIt+be+awasteoftimedoing…Itis/wasnogood/use/uselessdoing…Itis/wasworth/worthwhiledoing…It’s(great)fundoingsth.做……是浪费时间的做……是没有用的做……是值得的常用动词-ing形式作主语的句型有:做某事是有（极大）乐趣的Practice1.

(talk)iseasierthandoing.2.Learningnewwords

(be)veryimportantforme.3.Itisnouse______________(manage)toconvincehimnow;hehasalreadymadeuphismind.4.Itwasawasteoftime_________(cry)aboutthelostopportunity.5.It'sfun________(play)withyou,butIhavetogonow.6.It’sworthwhile___________(try)thisnewmethod.TalkingcryingplayingtryingmanagingisObserveandAnalyze1.HikingthroughthewildlandscapeofSarekNationalParkisajourneyintotheheartofuntamednature.2.Witnessingthemidnightsunandencounteringreindeerherdsareamongtheunfortettableexperiences.Tip1单个V-ing形式作主语，谓语动词用

；意义不同的两个V-ing形式并列作主语时，谓语动词用

。单数复数1.WatchingthelightshowinLiqiaopark

(be)exciting.2.Takingphotosandtastingdeliciousfood

(be)atthetopofthelistofmyfavoriteactivities.3.Yourcominglateandmakingnoise(disturb)everyone,mostofthemareannoyed.4.Balancingworkandpersonallife

(be)aconstantstruggleformany.5.Washingthedishesanddoingthelaundry

(take)

alotoftime.havedisturbedistakePractice1isareObserveandAnalyzehavingbeendone完成+被动1.Havingbeenmadeanationalparkresultsinafactthatallnewdevelopmentisbannedwithinparkboundaries.2.BeinglookedafterbytheSamikeepsthereindeerunderprotection.3.HavingadoptedsomeoftheSami’shabitsdoesn’tproveIamaSami.beingdone被动havingdone完成Tip2充当主语成分的v.-ing形式根据句意及动作的状态，也有

和

的变化。时态语态时态\语态主动语态被动语态一般时完成时doingbeingdonehavingdonehavingbeendonePractice21.___________________(inform)ofthechangeinadvancemadeiteasierforustoadjustourplans.2.__________________

(praise)bytheteacheryesterdaymadehimveryhappy.3._________________(receive)theletteralreadymeanswecanstarttheproject.4.

________________(see)themoviebeforedoesn'tstopmefromenjoyingitagain.5.__________(have)theopportunitytotravelabroadisawonderfulthing.HavingbeeninformedBeingpraisedHavingreceivedHavingseenHaving1.Hisbeinglateagain

madehisteacherveryangry.2.Mike’sreturningtowork

isagreathelptohisfamily.ObserveandAnalyzeTip3动词-ing的复合结构作主语时，通常有两种形式:(1)形容词性物主代词+动词-ing(2)名词所有格+动词-ingFillineachblankusingthev-ingformofaverbfromtheboxandstateitsfunction.Onewordwillbeusedtwice.combinecovergrowtakelimitwalkexperienceXixiNationalWetlandPark,

10squarekilometresinwesternHangzhou,isthefirstnationalwetlandparkinChina.

citylife,nature,andwetlandsmakestheparkapopulardestinationbothfortouristsandlocalresidents.AtXixi,

aboattour,

alongpaths,and

localcustomsandtraditionsofthevillagesinthisparkareatthetopofthelistofpeople'sfavouriteactivities.covering定语：表主动Combining主语takingwalkingexperiencing主语主语主语ExerciseWithtrees,bushes,andcolourfulflowers

alongtheriversides,theparkshowsdifferentsidesofbeautyindifferentseasons.Inordertobetterdevelopaswellaspreservethisplace,

humanimpactonXixiWetlandwasconsideredbytheparkdesigners.Allthenewbuildingsweredesignedinatraditionalwaytofitintothenaturalenvironment.Thisgreen,water