人教版（2019）必修三unit1 Festivals and Celebrations Discovering Useful Structures课件

DiscoveringUsefulStructures—BasicSentenceStructuresUnit1FestivalsandCelebrationsTalkaboutwhatkindoffestivalsyouareinterestedinisbestonebyone.RioCarnivalTheSpringFestivalThanksgivingStep1Lead-inChristmasLaTomatinaComparethefollowingsentencesandfindoutwhat’sfunctionofv.-inginthesentences.Theselanternsareamazing.Sheisswimminginaswimmingpool. Step2Learnaboutgrammarv.-ingPractiseonebyoneUsethegrammarv.-ingtotalkaboutwhatyoulikebestoffestivals.ExampleTheSpringfestivaltimeisanexcitingoneforme,because…__________________________________________________________________________________动词-­ing形式作表语、定语一、动词­-ing形式作表语常见的有：moving,interesting,encouraging,exciting,inspiring,boring,surprising,puzzling,amusing,astonishing...这类分词有“令人……的”的含义，常修饰物。作表语的动词-­ing形式包括现在分词和动名词。1．现在分词作表语，往往具有形容词的性质，说明主语的性质、特征等。作表语的现在分词，许多是由能够表示人们某种感情或情绪的动词变化而来的。Theargumentisveryconvincing.这个论点很令人信服。Heremainedstandingbesidethetable.他依然站在桌旁。Step3Learnaboutv.-ingcarefully

不定式和动词-­ed形式也可作表语，但不定式通常强调一次性的、具体的、将要发生的动作，动词­-ed形式则表示被动、完成含义。名师点津2．动名词作表语多表示抽象性的或习惯性的动作，一般说明主语的内容。Herjobiskeepingthelecturehallascleanaspossible.＝Keepingthelecturehallascleanaspossibleisherjob.她的工作是尽量使报告厅保持干净。二、动词-­ing形式作定语动名词和现在分词都可以作定语，但有所区别。2．现在分词作定语时，它和被修饰词之间有逻辑上的主动关系，表示所修饰

词进行的动作，相当于一个定语从句。Theboyplayingfootballontheplaygroundismyyoungerbrother.＝Theboythat/whoisplayingfootballontheplaygroundismyyoungerbrother.在操场上踢足球的那个男孩是我的弟弟。1．动名词作定语表示被修饰词的某种性能或用途，相当于for引导的介词短语。Nooneisallowedtospeakaloudinthereading

room.阅览室里不准大声说话。现在分词、过去分词和不定式作定语的一般区别：现在分词表示正在进行或习惯性的动作；过去分词表示被动或完成意义；不定式表示动作尚未发生。Youshouldadapttothechangingsituation.你应该适应不断变化的形势。Thegroundiscoveredwithfallenleaves.地上满是落叶。I’mlookingforaroomtolivein.我正在找房子住。名师点津Step4Completethepassagewiththeappropriate-ingformLaTomatinaisafestivalthattakesplaceintheSpanishtownBunoleveryAugust.Ithinkmanyfoodfestivalsare_______becausepeoplearejusteating.However,thisfestivalis___________becausepeopledon’tactuallyeatthetomatoes.Instead,theythrowthemateachother!Thenumberofpeople________partinthistomatofightcanreachupto20,000,anditisavery_______fightthatlastsforawholehour.The________thingishowcleanBunolisafterthetomatoesarewashedawayafterthefight.Thisisbecausethejuicefromtomatoesisreallygoodformakingsurfacesclean!1.Howdoyouusethefunctionof-ing?2.What’sthedi