UNIT3DiscoverUsefulStructures動詞-ing形式作主語1.TomasterthebasicgrammarrulesofV-ingformasthesubject.2.Tounderstandthegrammarruleof“It”asformalsubject.3.Putwhathasbeentaughtintopractice.LearningobjectivesLovinghimislikedrivinganewMaseratidownadeadendstreetFasterthanthewind,passionateassin,endingsosuddenly

himisliketryingtochangeyourmindonceyou'realreadyflyingthroughthefreefallLikethecolorsinautumnsobrightjustbeforetheyloseitall

himwasblue,likeI'dneverknown

himwasdarkgray,allalone

himwasliketrying

toknowsomebodyyounevermetButlovinghimwasred

himwasredTouchinghimwaslikerealizingallyoueverwantedwasrightthereinfrontofyouMemorizinghimwasaseasyasknowingallthewordstoyouroldfavoritesongFightingwithhimwasliketryingtosolveacrosswordandrealizingthere'snorightanswerRegrettinghimwaslike

wishingyouneverfoundoutthatlovecouldbethatstrongLovingLosingMissing

ForgettingLovingsubjectLead-inWhat’sincommon?Findmoresentenceswiththe–ingformasthesubjectfromthereadingpassage.Eventhoughthesunisbrightlyshining,tellingwhetheritismorningornightisimpossible.Gettinghereisquitedifficult,soapartfromtheSamiveryfewpeoplehaveeverseenSarek.Forhundredsofyears,lookingafterreindeer

wasawayoflifefortheSami.Beinginsuchabeautifulandwildplacemakesmefeelblessedtobealive.①②③④

Activity1

Observeanddiscover動詞-ing形式作主語Eventhoughthesunisbrightlyshining,tellingwhetheritismorningornightisimpossible.Gettinghereisquitedifficult,soapartfromtheSamiveryfewpeoplehaveeverseenSarek.Forhundredsofyears,lookingafterreindeer

wasawayoflifefortheSami.Beinginsuchabeautifulandwildplacemakesmefeelblessedtobealive.①②③④單數(shù)單個v-ing作主語，表示經(jīng)常性、習(xí)慣性動作,謂語動詞用

Drawingandplayingfootball

whatItookinterestinasateenager.

畫畫和踢足球是兩件事

兩個或兩個以上的動詞-ing短語作主語時，如果表示一件事，謂語動詞用

；如果表示兩件或多件事情，謂語動詞用

。

isare早起早睡是一件事Observeanddiscover單數(shù)復(fù)數(shù)Goingtobedearlyandgettingupearly

goodforourhealth.[即時演練]——單句語法填空(1)_________(read)aloudisveryimportantforustolearnaforeignlanguage.(2)Collectingstamps

(be)myhobby.(3)Sittingandtalkingtooldfriends

(be)apleasantwaytospendanevening.(4)Listening,speaking,readingandwriting______(be)basicskillsofalanguage.(5)_______（ask）awoman’sage

(be)impoliteinourcountry.ReadingisisareAskingis

Activity2ObserveanddiscoverPlayingvideogamesisawasteoftime.Itisawasteoftimeplayingvideogames.形式主語真正主語It在句首作形式主語，動詞-ing形式后置作真正的主語，用形容詞或名詞作表語。It作形式主語it作形式主語,常用動名詞短語作真正主語的句式:Itisnouse/uselessdoingsth.做某事沒有用的。Itisnofun/pleasuredoingsth.做某事是無趣的.Itisnogooddoingsth.做某事沒有好處的。Itisawasteoftimedoingsth.做某事是浪費時間的。Itisworthdoingsth.做某事是有價值的。Itisworthwhiledoingsth.做某事是有價值的。[即時演練]——單句語法填空1.Itisnouse______________(manage)toconvince

himnow;hehasalreadymadeuphismind.2.It'sawasteoftime

(persuade)himtojoinus.3.It'sfun______________(play)withyou,butIhavetogonow.4.It’sworthwhile______________(try)thisnewmethod.managingplayingtryingpersuadingRewriteeachofthefollowingsentencesusingthe-ingformasthesubject.Howdoesthesentencefocuschange?ItischallengingyetreallyfascinatingtohikethroughthemountainsinthepathlessSarek.HikingthroughthemountainsinthepathlessSarek

ischallengingyetreallyfascinating.Activity2Observeanddiscover1.Itisbothchallengingandrewardingtostudyabroad.Studyingabroadisbothchallengingandrewarding.GoingonahikingtourinSarekinwinterwouldhardlybepossibleduetotheextremecold.2.ItwouldhardlybepossibletogoonahikingtourinSarekinwinterduetotheextremecold.3.Honestly,itcanbebothexcitingandterrifyingtoexploreavastunknownland.Honestly,exploringavastunknownlandcanbebothexcitingandterrifying.Activity24.Itisgoodtoadoptapositiveattitude,evenwhenthingsaredifficult.Adoptingapositiveattitude

isgood,evenwhenthingsaredifficult.5.Itisstronglyadvisedtohirelocalguides,becausetheycanofferaccurateknowledgeofSarekcultureandhistory.Hiringlocalguidesisstronglyadvised,becausetheycanofferaccurateknowledgeofSarekcultureandhistory.Theuseof-ingformsassubjectputstheactionfirst,makingthesentencesseemmoredynamic.P29Ex.2

Activity3.動詞-ing的復(fù)合結(jié)構(gòu)作主語名詞的復(fù)合結(jié)構(gòu)做主語動名詞的復(fù)合結(jié)構(gòu)做主語coming

當動名詞有自己的邏輯主語時，?？梢栽趘-ing前面加上一個名詞________或_______________代詞作邏輯主語構(gòu)成動名詞的復(fù)合結(jié)構(gòu)。所有格形容詞性物主【練一練】(1)____________________madehisteacherveryangry.

他又一次遲到使他的老師非常生氣。(2)

isagreathelptohisfamily.

麥克回來工作對他全家來說都是一大幫助。HisbeinglateagainMike’sreturningtoworkTheir____________(come)tohelpwasagreatencouragementtous.他們過來幫忙(這件事)對我們來說是莫大的鼓舞。動名詞和todo都可以作主語。_________作主語表示比較抽象的、經(jīng)常性行為，__________作主語往往表示具體的或一次性的動作,特別是將來的行為。

動名詞

不定式Activity4

動詞-ing形式和不定式作主語時的區(qū)別

Deliveringnewspapersishisjob.送報紙是他的工作。

Todelivernewspapersishisjobtoday.送報紙是他今天的工作。_________(take)awalkaftersupperthiseveningisagoodidea.(2019天津)___________(learn)tothinkcriticallyisanimportantskilltoday'schildrenwillneedforthefuture.TotakeLearning動詞-ing形式作主語表示經(jīng)常性或習(xí)慣性的動作且常放句首形容詞性物主代詞+動詞-ing名詞所有格+動詞-ing動詞-ing作主語動詞-ing的復(fù)合結(jié)構(gòu)It’sawastetimedoingsthIt’suseless/nouse/nogooddoingsthIt’snofundoingsthit作形式主語動詞原形+-ing基本構(gòu)成基本用法動詞-ing與動詞不定式作主語的區(qū)別Summary小結(jié)一、用所給動詞的適當形式填空。1.

(wander)aroundthethemeparkisagreatwaytorelax.2.Hisnot

(know)Englishbroughthimalotofinconvenience.3.Climbingmountains

(be)reallyfun.【鞏固練習(xí)】Wanderingknowingis4.Itisnouse

(write)tohim;heneveranswersletters.5.(2019·全國卷Ⅱ)

(volunteer)justfeelssogood.6.(2024·全國甲卷)

（eat）alone,especiallyinfrontoftheTVorcomputer,oftenleadstomindlessovereating.writingVolunteeringEating二、完成句子。1.閱讀是擴大你的詞匯量的一個好方法。

isagoodwaytoenlargeyourvocabulary.2.沉迷手機是浪費時間的。

is

awasteoftime.3.參加這個活動是值得的。

isworthwhile.

ReadingBeingaddictedtosmartphones

Takingpartinthisactivity5.(2018·北京高考)沿著古老的“絲綢之路”旅行是一次有趣、有意義的經(jīng)歷。

isaninterestingandrewardingexperience.

TravelingalongtheoldSilkRoad4.飯后散步是一個很好的習(xí)慣。

isaverygoodhabit.WalkingafteramealPPT模板http://www.xxx/moban/

XixiNationalWetlandPark(西溪國家濕地公園),________10squarekilometresinwesternHangzhou,isthefirstnationalwetlandparkinChina.__________citylife,nature,andwetlandsmakestheparkapopulardestinationbothfortouristsandlocalresidents.AtXixi,______aboattour,________alongpaths,and___________local