人教九年级英语上册Unit 6 Section A (Grammar Focus-4c) 教案教学设计

Unit6Whenwasitinvented?SectionA(GrammarFocus~4c)教学目标【知识与技能】1.掌握本课词汇:fridge,low,somebody,translate,lock,earthquake,sudden,allofasudden,biscuit,cookie,instrument2.进行一步复习巩固学习SectionA部分所学的生词和词组。3.进一步学习运用一般过去时态的被动语态。4.掌握主动语态变被动语态的方法，并通过不同方式的练习，来熟练运用。【情感、态度与价值观】培养想象力，善于观察事物。面对难题，用积极的态度去解决，发挥想象力，认识世界，改造世界。教学重难点【教学重点】1.学习生词fridge,low,somebody,translate,lock,earthquake,sudden,allofasudden,biscuit,cookie,instrument2.复习巩固SectionA部分所学的生词和词组，达到熟练运用的目。【教学难点】1.一般过去时态的句子变为被动语态。2.综合运用所学的知识进行练习运用。教学过程Step1Warming-upandrevision1.Haveadictationofthenewwordslearnedinthelastclass.2.Reviewsomemainphraseswelearnedinthelastclass.Checkthehomework.3.LetsomeSstellsomethingabouthowteawasinventedbyaccident.Tellsomethingabouthowteawasinventedbyaccident.OnedayShenNongwasboilingdrinkingwateroveranopenfire.Someleavesfromateaplantfellintothewaterandremainedthereforsometime.Itproducedanicesmellsohetastedthebrownwater.Itwasquitedeliciousandoneoftheworld’sfavoritedrinkwasinvented.TellsomethingaboutLuYuandhisChaJing.LuYu“thesaintoftea”mentionedShenNonginhisbookChaJing.Thebookdescribeshowteaplantsweregrownandusedtomaketea.Italsodiscusseswherethefinesttealeaveswereproducedandwhatkindsofwaterwereused.ItisbelievedthatteawasbroughttoKoreaandJapanduring6thand7thcenturies.InEngland,teadidn’tappearuntilaround1660.TheteatradefromChinatoWesterncountriestookplaceinthe19thcentury.Step2GrammarFocus.1.学生阅读GrammarFocus中的句子，然后做填空练习。①拉链是什么时候被发明的？___________thezipper________?②它于1893年被发明。It_______________in1893.③它是由谁发明的？___________itinvented______?④它是由惠特科姆•贾得森发明的。It_________________WhitcombJudson.⑤茶叶什么时候被带到朝鲜去的？___________tea________toKorea?⑥茶叶在六到七世纪之间被带到朝鲜。It____________toKorea________the6thand7thcenturies.⑦热冰淇淋勺用来做什么？What____thehotice-cream__________?⑧它用于挖很冷的冰淇淋。It’s_________________reallycoldice-cream.⑨电话机在1876年被贝尔所发明。Thetelephone__________________AlexanderGrahamBellin1876.⑩贝尔于1876年发明了电话机。AlexanderGrahamBell______thetelephonein1876.2.学生们根据记忆，看大屏幕来完成填空练习。3.学生们完成填空试题后，可以打开课本检查答案，对错误的句子，单独进行强化记忆。Step3Grammar一般过去时态的被动语态的构成英语有两种语态：主动语态和被动语态。主动语态表示主语是动作的执行者，而被动语态则表示主语是动作的承受者。如：Wecleanedtheclassroomyesterday.我们昨天打扫了教室。(主动语态，主语we是clean这一动作的执行者)Theclassroomwascleanedyesterday.教室昨天被打扫。(被动语态，主语theclassroom是clean这一动作的承受者)一、一般过去时被动语态一般过去时被动语态的结构为“主语+was/were+及物动词的过去分词(+by+动作的执行者).”。如：Treeswereplantedlastspring.去年春天种了树。1.肯定句：主语+was/were+及物动词的过去分词+其他.PaperwasinventedbyChinesepeopletwothousandyearsago.纸是中国人在二千多年前发明的。2.否定句：主语+was/werenot+及物动词的过去分词+其他.Womenwerenotallowedtotakepartinthegamesatfirst.开始妇女不允许参加奥运会。3.一般疑问句：Was/Were+主语+及物动词的过去分词+其他?Werethesepicturesdrawnbyyoursister?这些图片是由你妹妹画的吗？二、被动语态的用法：1.不知道谁是动作的执行者，或没有必要指出谁是动作的执行者。e.g.Englishisspokenallovertheworld.全世界都在说英语。2.需要突出或强调动作的承受者。e.g.Thisdictionaryisusedbymoststudents.这本字典是大多数学生在用的。三、主动语态变被动语态应注意的问题1.有些短语动词相当于及物动词，变为被动句时介词或副词不能去掉。Theyputoffthemeetingbecauseoftheweather.Themeetingwasputoffbecauseoftheweather.会议因天气的缘故被推迟了。2.含有双宾语的主动句变为被动句时，通常把指“人”的间接宾语变为主语，指“物”的直接宾语保留不变；如果把指物”的直接宾语变为主语，则在间接宾语前加to或for。Myauntgavemeane-dictionaryyesterday.Iwasgivenane-dictionaryyesterday.Ane-dictionarywasgiventomeyesterday.3.主动句中感官动词see/hear/watch/feel等和使役动词make/let/have等后跟省略to的动词不定式，变为被动语态时应加上不定式符号to。Isawaheavymanenterthehouse.Aheavymanwasseentoenterthehouse.4.系动词、不及物动词或某些短语动词（happen,takeplace,cometrue,fallasleep…）没有被动语态。WhathappenedtoMr.Brown?布朗先生发生了什么事？Step4Exercises将下列句子变为被动语态。1.Hechosesixstorybookstheotherday.Sixstorybooks____________byhimtheotherday.2.UncleLeegaveJackalargecakeforhepaintedthewallwonderfully.Jack___________alargecakeforhepaintedthewallwonderfully.3.Amouseatehalfofthecakelastnight.Halfofthe_________byamouselastnight.Step5PracticeWorkon4a:1.TellSstoreadthesentencesin4aandrewritethesentencesusingthepassivevoice.2.做题方法点拨示例：①点拨：原句为一般过去时态，原句的谓语动词为sold，宾语为thefridge；改为被动语态时，应将thefridge作主语，谓语动词用wassold的形式。Theysoldthefridgeatalowprice.→Thefridgewassoldatalowprice.②点拨：分析原句的句子结构可知，stole是谓语动词，mycamera是句子的宾语；改为被动语态句时，应将mycamera作句子主语，谓语动词用wasstolen的形式。Somebodystolemycamerafrommyhotelroom.→Mycamerawasstolenfrommyhotelroom.学生们自主将其他三个句子变成被动语态。3.最后，教师与同学们一起校对答案，并对学生们有疑问的地方进行解释，或做出合理的分析点拨。Wherewerethesephotostaken?Wewereadvisednottogooutalone.Thebookwastranslatedintodifferentlanguagesbydifferentwriters.Workon4bCompletethesentenceswithcorrectformsoftheverbsinthebox.1.让学生们阅读方框中的词汇，了解词汇及句子的意思，为进行填词做好准备。eat,like,invite,tell,lock,ring,break,bring2.认真阅读每个句子，根据上下文确定空格处应填的意思。3.逐句进行分析推敲，然后分析句子的时态及语态，用适当的形式填空。1)You____________tothepartylastnight,weren’tyou?Whydidn’tyougo?2)Theearthquakehappenedallofasudden,butluckilythevillagers_____________toasafeplace.3)Thedoor___________whenwearrived,sowe______thebell.[来源:学_科_网Z_X_X_K]4)Thestudents___________nottoeator drinkinclass,butRuby______therulewhenshestartedeatingabiscuitinscience class.5)Thecookies__________bythehungrykidsinlessthan20minutes,andtheyreally_____them.4.最后，通读一遍所有句子，进行综合理解，看句子的意思是否通顺，合理。5.ChecktheanswerswiththeSs.1.wereinvited2.werebrought3.waslocked,rang(前一句中，门是被锁的，故应用被动语态；后一句中，我们去按门铃，是主动语态。)4.weretold,broke(前一句中，学生们是被告诉不要做这些事情，故应用被动语态；后一句中，Ruby违反规则，则是主动语态。)5.wereeaten,liked(前一句中，饼干是被孩子们吃掉了，故应用被动语态；后一句中，孩子们喜欢这些饼干，则是主动语态。)Step6PracticeWorkon4cDecidewhetheractiveorp