Unit13We'retryingtosavetheearthSectionA(GrammarFocus-4c)教案人教版九年級全冊英語

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現(xiàn)在進(jìn)行時現(xiàn)在進(jìn)行時的基本結(jié)構(gòu)：be(am/is/are)+動詞ing現(xiàn)在進(jìn)行時的基本用法：1.表示現(xiàn)在正在進(jìn)行或發(fā)生的動作。表示現(xiàn)階段或當(dāng)前一段時間之內(nèi)正在進(jìn)行的動作?，F(xiàn)在進(jìn)行時的標(biāo)志詞：now、look、listen、thesedays等。動詞ing形式的構(gòu)成一般情況下，在動詞詞尾后加ing。以不發(fā)音的e結(jié)尾的動詞，去掉e加ing。以重讀閉音節(jié)結(jié)尾的動詞，末尾只有一個輔音字母，雙寫這個輔音字母，再加ing?，F(xiàn)在完成時現(xiàn)在完成時的基本結(jié)構(gòu)：have/has+過去分詞現(xiàn)在完成時的基本用法：1.表示過去發(fā)生或已經(jīng)完成的動作對現(xiàn)在造成的影響或結(jié)果。2.從過去某一時間開始并一直持續(xù)到現(xiàn)在且還有可能持續(xù)下去的動作。現(xiàn)在完成時的標(biāo)志詞：already、yet、ever、never、for+時間段、since+時間點、sofar、inthelast/past...years等。過去分詞的構(gòu)成一般情況下，在動詞后加ed。如:work→worked。在以e結(jié)尾的動詞后只加d。如:close→closed。以輔音字母加y結(jié)尾的動詞，應(yīng)將y改為i再加ed。如:study→studied。以重讀閉音節(jié)結(jié)尾的動詞，要雙寫末尾的輔音字母再加ed。如:stop→stopped。不規(guī)則動詞的過去分詞:AAA型putputputAAB型beatbeatbeatenABA型beebecamebeeABB型getgotgot/gottenABC型beginbeganbegun被動語態(tài)主動語態(tài)表示主語是動作的執(zhí)行者。被動語態(tài)表示主語是動作的承受者，即行為動作的對象。在含有使役動詞(如：make)或感官動詞(see、watch、notice、hear等)的主動語態(tài)的句子中，這些詞后常跟省略to的動詞不定式，但是改為被動語態(tài)時則要把省去的to還原。被動語態(tài)的構(gòu)成被動語態(tài)的基本結(jié)構(gòu)：助動詞be+及物動詞的過去分詞一般現(xiàn)在時的被動語態(tài)：am/is/are+過去分詞一般過去時的被動語態(tài)：was/were+過去分詞一般將來時的被動語態(tài)：willbe/isgoingtobe+過去分詞含情態(tài)動詞的被動語態(tài)：情態(tài)動詞+be+過去分詞情態(tài)動詞1.情態(tài)動詞一般沒有人稱和數(shù)的變化。2.情態(tài)動詞后接動詞原形。3.常用的情態(tài)動詞有：can/could、may/might、must/haveto、should/oughtto、would、need等。usedto的用法usedto意為“過去常常做某事”，后接動詞原形。usedto句型的否定句形式：didn’tuseto...usedto句型的一般疑問句形式：Did+主語+useto...?usedtodo表示過去常常做某事，而現(xiàn)在往往不做了；beusedtodoing表示習(xí)慣于做某事。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“參加”，它多指參加會議或集體性的工作或活動，且參加者在其中發(fā)揮一定的作用。afford作動詞，意思是“承擔(dān)得起（后果）；買得起”常用在can、could、beableto等之后。affordsth.“買得起某物”；affordtodosth.“負(fù)擔(dān)得起做某事”。Step5Exercise,Summary&HomeworkExerciseDotheexercisesfromPPTP25P27.HomeworkPreviewthenewwordsandphrasesinSectionB(1a1e).Dotheexercisesinstudents’book.TeachingReflectionInthisperiod,weshouldreviewthepresentprogressivetense,presentperfecttense,passivevoice,modalverbsandthestructure“usedto”inreadingandspeakingactivities.Wewilllearnsomenewwordsandexpressionsaboutenvironmentalprotectioninlanguagelearning,soitisnecessarytogetthestudentstopayenoughattentiontothenewwordsandtrytocollectmoreofthem.Whenwedealwiththegram