Unit13We'retryingtosavetheearthSectionA(GrammarFocus-4c)教案人教版九年级全册英语

Unit13We’retryingtosavetheearth！SectionA（GrammarFocus4c）TeachingAimsLanguagegoalsToreviewdifferenttensesandvoices.Keywordsandphrasestakepartin,afford,turnoff,reusable,payfor,takeaction,transportationKeysentencesHaveyouevertakenpartinanenvironmentalproject?2.Weshouldhelpsavethesharks.TeachingDifficultiesLetSsreviewdifferenttensesandvoices.TeachingAidsCAI,multimediacoursewareorotherrealiathattheTneedsforteachingTeachingProceduresTipsStep1WarmupRevisionAskSstoworkinpairs,thentaketurnstoretellthepassageof3a.(Optionalchoice:TcanalsoaskSstoretellthepassagebywritingitdown.)TcanusethefollowingquestionstohelpSsrememberthepassage:What'sthesharks'problem?Whyaretheyendangered?Somefactsandnumbersaboutsharksatpresent.Howtosavethesharks?(Tip:Iftheclassisweak,TcanusethediagramonPPTP6tohelpSsreviewthepassage.Iftheclassisstrong,TcanusethediagramtomakeasummaryafterSs’retelling.)Step2Presentation&GrammarGrammarFocusAskSstoreadthesentencesinthecolumnsofGrammarFocus.TellSsthatthey’regoingtoreviewthepresentprogressive,usedto,passivevoice,presentperfectandmodalverbsinthislesson.Grammar现在进行时现在进行时的基本结构：be(am/is/are)+动词ing现在进行时的基本用法：1.表示现在正在进行或发生的动作。表示现阶段或当前一段时间之内正在进行的动作。现在进行时的标志词：now、look、listen、thesedays等。动词ing形式的构成一般情况下，在动词词尾后加ing。以不发音的e结尾的动词，去掉e加ing。以重读闭音节结尾的动词，末尾只有一个辅音字母，双写这个辅音字母，再加ing。现在完成时现在完成时的基本结构：have/has+过去分词现在完成时的基本用法：1.表示过去发生或已经完成的动作对现在造成的影响或结果。2.从过去某一时间开始并一直持续到现在且还有可能持续下去的动作。现在完成时的标志词：already、yet、ever、never、for+时间段、since+时间点、sofar、inthelast/past...years等。过去分词的构成一般情况下，在动词后加ed。如:work→worked。在以e结尾的动词后只加d。如:close→closed。以辅音字母加y结尾的动词，应将y改为i再加ed。如:study→studied。以重读闭音节结尾的动词，要双写末尾的辅音字母再加ed。如:stop→stopped。不规则动词的过去分词:AAA型putputputAAB型beatbeatbeatenABA型beebecamebeeABB型getgotgot/gottenABC型beginbeganbegun被动语态主动语态表示主语是动作的执行者。被动语态表示主语是动作的承受者，即行为动作的对象。在含有使役动词(如：make)或感官动词(see、watch、notice、hear等)的主动语态的句子中，这些词后常跟省略to的动词不定式，但是改为被动语态时则要把省去的to还原。被动语态的构成被动语态的基本结构：助动词be+及物动词的过去分词一般现在时的被动语态：am/is/are+过去分词一般过去时的被动语态：was/were+过去分词一般将来时的被动语态：willbe/isgoingtobe+过去分词含情态动词的被动语态：情态动词+be+过去分词情态动词1.情态动词一般没有人称和数的变化。2.情态动词后接动词原形。3.常用的情态动词有：can/could、may/might、must/haveto、should/oughtto、would、need等。usedto的用法usedto意为“过去常常做某事”，后接动词原形。usedto句型的否定句形式：didn’tuseto...usedto句型的一般疑问句形式：Did+主语+useto...?usedtodo表示过去常常做某事，而现在往往不做了；beusedtodoing表示习惯于做某事。Step3Practice4aAskSstofillintheblankswiththecorrectformsoftheverbsinbrackets.Answers:(fromlefttoright,fromtoptobottom)Have...taken,helped,considered,had...had,took,think,came,trying,wait4bAskSstofillintheblankswiththeappropriatemodalverbsfromthebox.Suggestedanswers:may/might,must/haveto,can/should/could,can/could/should,haveto,can/could/should,can/could,can/could,would/can/could4cTmaywanttohaveSsworkingroupsoffourtomakealistofthingsthatpeoplecandotohelpprotecttheenvironment.Whenthegroupshavemadetheirlists,conductanopenclassdiscussionandelicitsuggestionsfromeachgroup.Tcanwritethesuggestionsontheboard,thenencourageSstomentononeanother’ssuggestions.Suggestedanswers:takeyourownshoppingbagswhenyougoshoppingdon’tusedisposableitemslikedisposablecutlery,cameras,etc.turnoffthelightswhenyouleavetheroomreducetheuseofairconditionersinsummergrowmoreplantsStep4Languagepointslearningtakepartin的意思是“参加”，它多指参加会议或集体性的工作或活动，且参加者在其中发挥一定的作用。afford作动词，意思是“承担得起（后果）；买得起”常用在can、could、beableto等之后。affordsth.“买得起某物”；affordtodosth.“负担得起做某事”。Step5Exercise,Summary&HomeworkExerciseDotheexercisesfromPPTP25P27.HomeworkPreviewthenewwordsandphrasesinSectionB(1a1e).Dotheexercisesinstudents’book.TeachingReflectionInthisperiod,weshouldreviewthepresentprogressivetense,presentperfecttense,passivevoice,modalverbsandthestructure“usedto”inreadingandspeakingactivities.Wewilllearnsomenewwordsandexpressionsaboutenvironmentalprotectioninlanguagelearning,soitisnecessarytogetthestudentstopayenoughattentiontothenewwordsandtrytocollectmoreofthem.Whenwedealwiththegram