Unit 13 Section A （Grammar focus-4c）課件-人教版九年級英語全冊

Unit13We’retryingtosavetheearth!SectionA(3a~4c)SectionA（Grammarfocus-4c）教學(xué)目標：教學(xué)重難點：usedto的用法；現(xiàn)在進行時；被動語態(tài)；現(xiàn)在完成時；情態(tài)動詞的用法。1.能記住本節(jié)課的單詞，詞組.2.掌握各種時態(tài)的用法。2Wearetryingtosavetheearth.Theriverusedtobesoclean.Theairisbadlypolluted.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.GrammarPresentprogressiveusedtoPresentperfectPassivevoiceModalverbs現(xiàn)在進行時(1)含義：表示正在發(fā)生或進行的動作。(2)基本結(jié)構(gòu)：主語+be+現(xiàn)在分詞（be

的形式隨主語的變化而變化）(3)基本用法：①表示現(xiàn)在正在進行的動作。特征：常常與now或具體的時間連用，有時

句中會有感官動詞來提示，或通過上下文來暗示。②表示現(xiàn)階段一直進行的動作。這類動詞常常是延續(xù)性動詞。常與

atpresent,thisweek,thesedays等連用。③表示主語的特征、性格、能力等。GrammarFocususedto句型usedto意為“過去常常做某事”，指的是過去的習(xí)慣性動作，目的在于與現(xiàn)在形成對照。usedto是個情態(tài)動詞，其中的to是不定式符號，后面跟動詞原形。在美式英語中,它的疑問式是：Did

＋主語＋usetodosth.？否定式是：主語＋didn'tuse…在英式英語中，它的疑問式應(yīng)當(dāng)是：Used＋主語＋todosth.？否定式應(yīng)當(dāng)是usednottodosth.或use(d)n’ttodosth.。Heusedtostayuplate.他過去常熬到很晚。GrammarFocus被動語態(tài)初中階段我們學(xué)習(xí)了八種被動結(jié)構(gòu)，歸納如下：(1)一般現(xiàn)在時的被動語態(tài)：am/is/are+過去分詞(2)現(xiàn)在完成時的被動語態(tài)：have/has+been+過去分詞(3)現(xiàn)在進行時的被動語態(tài)：am/is/are+being+過去分詞(4)一般過去時的被動語態(tài)：was/were+過去分詞(5)過去進行時的被動語態(tài)：was/were+being+過去分詞(6)過去完成時的被動語態(tài)：had+been+過去分詞(7)一般將來時的被動語態(tài)：will/begoingtobe+過去分詞(8)含有情態(tài)動詞的被動語態(tài)：情態(tài)動詞+be+動詞的過去分詞GrammarFocus現(xiàn)在完成時(1)含義：表示過去發(fā)生的動作對現(xiàn)在的影響。(2)基本結(jié)構(gòu)：主語+have/has+過去分詞(3)基本用法：①表示過去發(fā)生的動作，但強調(diào)對現(xiàn)在產(chǎn)生影響。特征：不能與具體的

時間狀語連用。②表示過去發(fā)生的動作或存在的狀態(tài)一直延續(xù)到現(xiàn)在，還可能繼續(xù)下去。

常常與since,for,inthepast+時間名詞，inthelast+時間名詞等時間

狀語連用，此時謂語動詞要求是延續(xù)性動詞。③表示一種“經(jīng)歷或體驗”，即可以表示經(jīng)歷過也可以是從來都沒有經(jīng)

歷過。GrammarFocus情態(tài)動詞情態(tài)動詞表示說話人對某一動作或狀態(tài)的態(tài)度，如認為“可能”、“應(yīng)當(dāng)”、“必要”等。情態(tài)動詞本身有一定的意義，但不能單獨作謂語，也沒有人稱和數(shù)的變化。后面一般跟動詞原形。GrammarFocus4aFillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:_____youever______(take)partinanenvironmentalproject?Eric:Yes,Ihave.I______(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscity____ever____(have).Have

takenhelpedconsideredhadhad參加辨析：join,joinin和takepartintojoin加入組織，團體，黨派等，有作為其中的一個成員的含義;后面也可以加表示人的名詞，表示和某人一起參加某活動joinin加入一種具體活動。takeaprtin指參加會議或群眾性活動等，著重說明句子主語參加該項活動并在活動中發(fā)揮作用。Joe:Howmanypeople____(take)part?Eric:I_____(think)morethan1,000people______(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis______(try)toimprovetheenvironment.Eric:Yes,wecan’taffordto____(wait)anylongertotakeaction!tookthinkcametryingwaitv.

承擔(dān)得起(后果);買得起4bFillintheblankswiththeappropriatemodalverbsfromthebox.People__________thinkthatbigthings______bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you____savemay/mightmustcancanwouldcouldhavetoshouldmustmay/mightelectricitybyturningoffthelightswhenyouleavearoom.You______alsousereusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you__________rideyourbikeorwalk.Ifit’sfar,you__________takethebus.Allthese

couldhavetocan/shouldcan/could關(guān)掉adj.可重復(fù)使用的付費;付出代價smallthings______addupandbecomebigthingsthat_________improvetheenvironment.Let’stakeactionnow!couldwould/can采取行動4cMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.A:Ithinkthateveryoneshouldusepublictransportation.B:Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation…Completethefollowingsentences.I_________(be)inBeijingfortwoyears.2.I_____never_____(hear)ofthatmanbefore.3.Tom__________(work)theresincetwoyearsago.havebeenhaveheard

hasworkedExercise4.Thetwins___________(wash)theclothesforanhour.5.He_________(play)basketballsincethreeyearsago.6.Howlong____Sally_____(sing)yet?havewashedhasplayedhassung用所給詞的適當(dāng)形式填空。1.Theoldmanused_____(be)ateacher.2.Weshould_____(clean)theroomeveryday.3.Look!Tom_________(sleep)inhisroom.4.Lotsoftrees__________(plant)onthehilleveryyear.5.He_________(live)herefor20years.tobecleanissleepingareplantedhaslived用括號里所給動詞的正確形式填空1.Thegirl___________(dance)intheclassroom.2.It's5o'clocknow.Mike_________(have)dinner.3.--_____youever____(be)totheUS?--Yes,twice.4.--MayIspeaktoJohn?--Sorry,he__________(go)toNewYork.hewillbebackintwodays.5.--DidyougotoJack'sbirthday?--No,I______________(notinvite).isdancingishavingHavebeenhasgonewasnotinvited1.Hepromisedtopickmeupattheschoolgate.However,he_____yet.A.didn’tarrive

B.doesn’tarriveC.isn’tarrivingD.hasn’tarrived2.BaJin,oneofthegreatestwritersinChina,___as“People’sWriter”.

A.isregarded

B.hasregarded

C.isregarding

D.regardsChoosethebestanswer.3.—WhereisTom?—He______inhisroom. A.isreading B.reads C.read D.wasreading4.—MayIgooutnow,Dad?—No.You_____letyourmotherknowfirst.A.canB.mayC.needD.must5.Herson_______Coke,butnowhe__