Unit13We'retryingtosavetheearth!SectionAGrammar4c课件人教版英语九年级全册

GrammarFocus-4cUnit13We’retryingtosavetheearth!AIMSReviewtheuseofPresentprogressive,usedto,Passivevoice,PresentperfectandModalverbs.01Masterthembydoingsomeexercises.02Summarizethetenseknowledgewehavelearned.03RevisionTranslatethefollowingphrasesintoEnglish.1.听说2.切除3.不再4.不但...而且...5.在过去的20-30年里6.对...有害7.在...的顶部8.比如9.对...有益10.到目前为止11.事实上12.处在危险中hearofcutoffnomorenotonly...butalso...inthelast20to30yearsbeharmfultoatthetopofsuchasbegoodforsofarinfactbeindangerPresentationGrammarFocusWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.ModalverbsGrammar现在进行时Presentprogressive定义结构标志词例句表示说话时(瞬间)正在进行的动作,也表示目前或现阶段正在进行的动作，或说话者的强烈情感。be(am/is/are)+v.-ing形式look,listen,now,rightnow…e.g.Listen!Theboyissinging.It’salwaysraininghere.(抱怨情绪)ExerciseisringingamwaitingiswritingGrammar现在完成时Presentperfect定义结构标志词固定搭配表示动作已经完成,但对现在造成影响has/have+过去分词already,yet,ever,never,just,before,once,twice,recently,sofar,for+时间,since+时间点/从句。havebeento去过某地,说话时已从该地回来。havegoneto去了某地,说话时尚未返回。havebeenin已在某地,与一段时间连用。ExerciseCompletethefollowingsentences.I_________(be)inBeijingfortwoyears.2.I_____never_____(hear)ofthatmanbefore.3.Tom__________(work)theresincetwoyearsago.4.Thetwins___________(wash)theclothesforanhour.5.He_________(play)basketballsincethreeyearsago.6.Howlong____Sally_____(sing)yet?havebeenhaveheardhasworkedhavewashedhasplayedhassungExerciseFillintheblankswiththecorrectformsoftheverbsinbrackets.Havetakenhelpedconsideredhadhad参加tookthinkcametryingwaitv.

承担得起(后果);买得起Grammarusedtodousedtodosth.usedtodosth.过去常常做某事否定句式一般疑问句式附加疑问句式didn’tusetodosth.Did+主语+usetodosth.?…,didn’t+主语?beusedto(doing)sth.习惯于(做)某事ExerciseTranslation.1.她过去常常周末和朋友闲逛。2.他习惯于每天晚上熬夜。

Sheusedtohangoutwithfriendsonweekends.Heisusedtostayingupeverynight.Grammar被动语态Passivevoice定义结构不同时态的被动语态结构(以动词do为例)表示主语是动作的承受者be+过去分词一般现在时一般过去时一般将来时含情态动词am/is/are+donewas/were+donewill/is(/am/are)goingto+be+donecan/may/must...+be+doneExercise单项选择：1.Thenovel______bymanypeopletoday.

A.isread

B.areread

C.reads

D.wereread2.Thesemodelcars____inChinain2013.

A.aremade

B.weremade

C.make

D.made3.—Howcleanyourcaris!

—Thankyou.It____veryoften.

A.iswashed

B.washes

C.waswashed

D.washed4.Whenyou______adifficulttask,trytocontinuewithitandfinishit.

A.give

B.aregiving

C.gave

D.aregiven5.We______tostartatonce,orwewillmissthetrain.

A.tell

B.havetold

C.aretold

D.toldGrammar情态动词Modelverbs情态动词本身有一定的词义,表示说话人的情感、态度或语气,但不能单独作谓语,只能与其他动词构成谓语。常见的情态动词情态动词无人称和数的变化,后接动词原形。否定式是在情态动词后面加not,haveto除外。个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。ExerciseFillintheblankswiththeappropriatemodalverbsfromthebox.may/mightmustcancanwouldcouldhavetoshouldmustmay/mightcouldhavetocan/shouldcan/couldcouldwould/can关掉adj.可重复使用的付费，付出代价采取行动PairworkMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.

usepublictransportation(n.交通运输)

turnoffthelightswhenyouleavearoom

usereusablebagsinsteadofplasticbags

rideyourbikeorwalktoschoolorwork

stopusingpapernapkins(n.餐巾纸)

recyclebooksandpaper…A:Ithinkthateveryoneshoulduse

publictransportation.B:Id