选择性必修1 Unit 5 Discover Useful Structures：《主语从句》教学设计

选择性必修1Unit5DiscoverUsefulStructures：《主语从句》教学设计LearningGoals能够识别主语从句，系统总结其语法功能及核心用法规则。能够在书面表达中准确、规范地运用主语从句。LearningProceduresPreviewBeforeClass阅读以下短文，划出所有主语从句。某长辈一直抱怨超市售卖的蔬菜——这些蔬菜是使用化肥种植的。它们外表光鲜亮丽，这一点显而易见。然而，她不满的是其较低的营养价值和变淡的风味。既然两位长辈均已从城市的工作岗位退休，如何度过退休生活对他们而言是一项重要的决定。能否过上健康的生活是他们首要考虑的问题。因此，他们下定决心搬到乡下，在那里过上绿色环保的生活。LearninClassStep1Leadin找出下列句子中的主语。Janeworkshard.Youareastudent.Twowillbeenough.Theoldshouldberespected.Smokingisbadforyou.Tofindyourwaycanbeaproblem.Whatshesaidisnotyetknown.思考问题：主语：句子所说明的人或事物，一般位于_____（陈述句中多在句首）。主语从句：在复合句中充当______（主语）的从句。Step2PresentationObserve1:连接词的选择Thatyouhavestolenmyheartisobvious.Whetheryoulovemeornotisnoneofmybusiness.Conclusion1：that在主语从句中____（无）含义，_______（不充当）句子成分，_____（不可）省略（位于句首时）。whether在句中_______(不充当）句子成分；意思是“_______（是否）”，_____（不可）省略。Practice：用that,whether或if填空。Itdoesn’tmatter___________hewilleornot.________TomreallysawSharonwasdoubtful.Itwasdoubtful___________TomreallysawSharon.________shecouldetohelpusmadeusveryhappy.Observe2:连接代词的选择WhatIwantisjustyou.Whichteamwillwinthematchisstillunknown.Whowouldconvincehimtochangehismindarousedmycuriosity.Whoevercandigestwhattheteachersteachislikelytogethigherscores.Conclusion2：引导主语从句的连接代词，主要有“谁”（who）、“无论谁”（whoever）、“什么”（what）、“无论什么”（whatever）、“谁的”（whose）、“哪一个”（which）、“无论哪个”____（whichever）等；在句中可以充当________（主语）、（宾语）、表语、（定语）。Practice：用适当的连接代词填空。___________Iwanttoknowiswhichroadweshouldtake.___________partofthecountryhewilltraveltoneedsdiscussing.___________surprisesmemostisthatheistooproud.___________isinterestedintheactivitycansignyourname.Observe3:连接副词的选择Whenthebombwillexplodeworriestheman.WhereIwillspendmysummervacationhasn’tbeendecidedyet.Whyshedidn’tshowupatmybirthdaypartyremainsapuzzle.Howheattainedsuccessisunknown.Conclusion3：When在主语从句中充当_____________________（时间状语）。Where在主语从句中充当_____________________（地点状语）。Why在主语从句中充当_____________________（原因状语）。How在主语从句中充当_____________________（方式/程度状语）。Practice：用适当的连接副词填空。___________Johnwaslatefortheclasshasbeenunexplained.___________hesolvedtheproblemsuccessfullyinterestedallofus.___________carswillbeparkedinthefutureisaquestion.Exactly___________thepotatowasintroducedintoEuropeisuncertain,butitwasprobablyaround1565.Step3RulesExploration探寻规律1：主语从句太长怎么办？当主语从句结构较长时，为避免句子头重脚轻，常用it作形式主语，将真正的主语从句后置。常见结构如下：Itisnecessarythatseveralnurses(should)stay.It’sapitythathedidn’te.Itissuggestedthatthemeetingbeputoff.Itseemsthatitisgoingtorain.Itsurprisedhimwhytheycametovisithimsuddenly.探寻规律2：主语从句的语序？主语从句需遵循陈述句语序（连接词+主语+谓语），判断下列句子正误。Itisn’tclearwhetherhewilleornot.()（答案：T）Itisn’tclearwhetherwillheeornot.()（答案：F）探寻规律3：主语从句的主谓一致问题？主谓一致规则：单个主语从句作主语时，谓语动词用单数；两个或多个并列的主语从句作主语时，若表示同一概念，谓语动词用单数；若表示不同概念，谓语动词用复数；由what引导的主语从句，谓语动词的单复数取决于从句所指代的内容（单数概念用单数，复数概念用复数）。Practice：用be动词的适当形式填空。Whetherthepatientwillbetaken______(is)unknown.Whenandwherethepatientwillbetaken_____(is)unknown.Whenthetaskcanbefinishedandwhetherhecanhavearest________(are)unknown.(1)Whathewantsmost_______(is)stayingwithhisfamily.(2)Whattheyneed_______(are)masks(口罩).Step4Summary连接词：that（无义，不充当成分，不可省略）、whether（表“是否”，不充当成分，不可省略）；连接代词：who,whoever,what,whatever,whose,which,whichever（充当主语、宾语、表语或定语）；连接副词：when（时间状语）、where（地点状语）、why（原因状语）、how（方式/程度状语）；核心规律：规律1：主语从句过长时，用it作形式主语，真正的主语从句后置，避免句子头重脚轻；规律2：主语从句必须使用陈述句语序，不可用疑问句语序；规律3：主谓一致需结合从句数量及指代内容判断（单个从句用单数；并列从句表同一概念用单数、表不同概念用复数；what引导的从句取决于指代内容的单复数）。Step5ExerciseExercise1：用适当的连词填空。Itgoeswithoutsaying__________thecollapseofbigfamiliesandthepopularityofsmalleronesaretheresultofourtimes.__________touchedtheteachersmostwastheunityandfriendshipamongthechildren.It’sunclear__________thetwosidesofthemoonaresodifferent;thesamplescollectedcouldprovidesomeclues,andwilllikelybringarangeofinvaluablescientificpayoffs.__________IlikemostinChineseinkpaintingisthefreedomitallowsyou.Itispossible__________caffeinemaycausebirthdefects（缺陷）inhumans,too．Exercise2：语篇填空。1._____1._____theexamwillbeheldinJuneiscertain,but2._____you’lltakeitisuncertain,maybeatanotherschool.Now,3._____youcandoistostudyhardandkeephealthy.Then,aftertheexam,4.___________yougotouniversityornotand5._____collegeyou’llchoosearealluptoyou.Afterall,6._____seemsgoodtosomepeopleseemsbadtoothers.Exercise3：用本节课所学的主