Unit 10 Section A Grammar focus -3c課件-人教版英語八年級上冊

Unit10Ifyougototheparty,you’llhaveagreattime!SectionAGrammarFocusLearningAimsKeywords&phrases:upset;taxi;advice;getuplate;studyformyEnglishexam.Keysentences:1.---Whatwillhappeniftheyhavethepartytoday?---Iftheyhaveittoday,halftheclasswon’tcome.2.Idon’tknowwhattodoaboutgoingtoMike’sbirthdaypartytomorrownight.3.Canyougivemesomeadviceplease?Tolearntousethefirstconditiontotalkaboutconsequences.Revision:穿牛仔褲去派對在家呆著乘公交去派對明天晚上玩得開心談?wù)撛谛瞧谖逋砩峡翠浵笠话氲膶W(xué)生wearjeanstothepartystayathometakethebustothepartytomorrownighthaveagreattimetalkaboutonFridayeveningwatchavideohalftheclassPresentationRevisionLookandsay.Lookatthepicturesandmakesentenceswith“if”.IfyougotothepartywithKarenandAnna,you’llhaveagoodtime.Ifyouwearjeanstotheparty,theteacherswon’tletyouin.Ifyoutakethebustotheparty,you’llbelate.Ifyoustayathome,youwillbesorry.LookandsaySentencepatterntransformation.Heisgoingtowalktoschool.Hewillbelate.Wecansay:Ifhe_______toschool,he_________late.walkswillbeWecanalsosay:He_________lateifhe_______toschool.walksTips:if在主句前，用逗號隔開;if在主句后，則不用逗號。willbe從句主句PracticeIfit____

sunnytomorrow,they___________atrip.Itwillbesunnytomorrow.Theywillhaveatriptomorrow.iswillhaveIfhe_______studyhard,he_________theexam.doesn’twillfailHewillfailtheexam.Hewon’tstudyhard.PresentationPracticeFillintheblanksaccordingtogrammarfocus.1.我想我將會(huì)乘公共汽車去參加聚會(huì)。I_____I’lltakethebustothe______.2.如果你那樣做，你將會(huì)遲到。Ifyou_____,_____belate.3.我想我將待在家里。I__________stayathome.4.如果你那樣做，你將會(huì)覺得很抱歉。Ifyou____,__________sorry.5.如果他們今天聚會(huì)，將會(huì)發(fā)生什么事？_______________ifthey_____thepartytoday?6.如果他們今天聚會(huì)，班里一半的學(xué)生將不會(huì)去。Ifthey______thepartytoday,______theclass_______come.7.我們應(yīng)當(dāng)要求人們帶食物來嗎？

Shouldwe______peopleto______food?8.如果我們要求人們帶食物來時(shí)，他們將會(huì)只帶薯?xiàng)l和巧克力。______we______peopletobringfood,________just______potatochipsandchocolate.

doyou’llthinkpartythinkI’lldoyou’llbeWhatwillhappenhavehavehalfwon’taskbringthey’llbringIfaskGrammarFocusGrammarfocusReadthefollowingsentencesandfindsentencesincluding“If…will…”.IthinkI’lltakethebustotheparty.Ifyoudo,you’llbelate.IthinkI’llstayathome.Ifyoudo,you’llbesorry.Whatwillhappeniftheyhavethepartytoday?Iftheyhaveittoday,halftheclasswon’tcome.Shouldweaskpeopletobringfood?Ifweaskpeopletobringfood,they’lljustbringpotatochipsandchocolate.Predicttheconsequences.Whatarethesesentences’function?Ifyoutakethebustotheparty,you’llbelate.Ifyoustayathome,you’llbesorry.為避免重復(fù),條件狀語從句常用助動(dòng)詞do(does/did)來替代上文所提到的動(dòng)作。例如：We

will

gototheparkifit_____________(rain)tomorrow.Grammar

含if條件狀語從句的主從復(fù)合句1.if條件狀語從句中，主句用一般將來時(shí)，從句用___________表示將來。

________原則。doesn’t主將從現(xiàn)rain一般現(xiàn)在時(shí)2.if條件狀語從句中，如果主句有must，can，may

等情態(tài)動(dòng)詞，從句用___________。一般現(xiàn)在時(shí)例如：Youmuststopifthetrafficlight____(be)red.is3.if條件狀語從句中，主句是祈使句，從句用____________表示將來。_________原則。一般現(xiàn)在時(shí)主祈從現(xiàn)例如：Don’t

waitformeifI_____(be)late.am一、狀語從句

要想了解狀語從句，那么首先得知道什么是狀語。簡單的說，狀語通常由______充當(dāng)或_______________________充當(dāng)，副詞可以在句子中修飾動(dòng)詞、形容詞、副詞或整個(gè)句子，表明方式，時(shí)間，地點(diǎn)、程度等，副詞一般譯成____________。副詞相當(dāng)于副詞的短語和句子如：Igotoworkbycar.

(介詞短語作方式狀語)Herunsfast.

(副詞作程度狀語)

Hecameyesterday.他昨天來了。（副詞作時(shí)間狀語）

Iusuallyplayfootballontheplayground.（介詞短語作地點(diǎn)狀語）Inordertocatchupwithmyclassmates,Imuststudyharder.(不定式作目的狀語)Withouthishelp,wecouldn'tworkouttheproblemintime.(介詞短語作條件狀語)“……地/得”If條件狀語從句的復(fù)合句中主從句的時(shí)態(tài)if引導(dǎo)的條件狀語從句要遵循“主將從現(xiàn)”的規(guī)則。即if引導(dǎo)的條件狀語從句，主句用一般將來時(shí)(用will形式，不能用begoingto形式)，從句用一般現(xiàn)在時(shí)。?主句是一般將來時(shí)，從句用一般現(xiàn)在時(shí)。如：IfIgototheparty,I’llhaveagreattime.I’llhaveagreattimeifIgototheparty.從句主句一般現(xiàn)在時(shí)一般將來時(shí)從句主句一般現(xiàn)在時(shí)一般將來時(shí)句子結(jié)構(gòu)：If+從句,主句.=主句+if+從句.主將從現(xiàn)RULE1:主將從現(xiàn)主句用一般將來時(shí)，從句則用一般現(xiàn)在時(shí)IfmymotherisfreethisSunday,shewilltakemetothepark.Ifhecomes,hewilltellmeall.如：Ifyoueatbadfood,youmayfallill.?

主句謂語含有情態(tài)動(dòng)詞may/might/can/must/should等，從句用一般現(xiàn)在時(shí)。從句主句一般現(xiàn)在時(shí)含情態(tài)動(dòng)詞mayIfthetrafficlightsarered,youmuststopandwait.從句主句一般現(xiàn)在時(shí)含情態(tài)動(dòng)詞mustYoucanpasstheexamifyouworkhard.從句主句一般現(xiàn)在時(shí)含情態(tài)動(dòng)詞canRULE2:主情從現(xiàn)主句用情態(tài)動(dòng)詞+動(dòng)詞原形，從句用一般現(xiàn)在時(shí)Ifyouwanttopasstheexam,youmuststudyhard.Ifyouwanttoloseweight,youshouldeatlessbread.?如果主句是祈使句，那么從句通常要用一般現(xiàn)在時(shí)。(即主祈從現(xiàn))如：Ifthelightisred,waitforaminute.從句主句一般現(xiàn)在時(shí)祈使句Ifyouwanttohaveachat,callmeup.Don’twaitformeifIamlate.從句主句一般現(xiàn)在時(shí)祈使句從句主句一般現(xiàn)在時(shí)祈使句主祈從現(xiàn)RULE3:主祈從現(xiàn)主句用祈使句，從句用一般現(xiàn)在時(shí)Ifyouseehim,givehimthisnotebook.TellhimI’mnotathomeifsomeonecalls.2知識(shí)講解有些句子可與含if的條件狀語從句互相轉(zhuǎn)換。?有if引導(dǎo)的條件狀語從句的復(fù)合句中，當(dāng)主句和從句的主語均為you時(shí)，可轉(zhuǎn)換為“祈使句，and+簡單句”或“祈使句，or(否則)+簡單句”如：Ifyoustudyhard,

you’llpasstheexameasily._____________,_____you’llpasstheexameasily.StudyhardIfyoudon’thurryup,

youwillbelateagain.__________,_____youwillbelateagain.HurryuporandYouwillbehealthier

ifyoueatwell._________,_____youwillbehealthier.Eatwelland?

借助介詞with或without來轉(zhuǎn)換。如：Youcan’tdrivethecarifthedoorisopen.Youcan’tdrivethecar__________________.withthedooropenIfthereisnowater,fishwilldie.Fishwilldie_____________.withoutwaterWithyourhelp,I’llfinishmyjobsoon._____________,I’llfinishmyjobsoon.IfyouhelpmeGrammarfocus【拓展】if表“是否”if還意為“是否”，用來引導(dǎo)賓語從句，=whether，時(shí)態(tài)根據(jù)語境而定Sheaskedmeif/whetherIknewMike(ornot)．她問我是否認(rèn)識(shí)邁克。Iwonderwhetherornothewillcometomyparty.我想知道他是否會(huì)來參加我的聚會(huì)。如果ornot在從句句尾，if,whether可互換。whetherornot不能用if替換Post-GrammarFillintheblankswiththecorrectformsoftheverbsinbrackets.3aknowdothinkgowillbetellshavewearwilllookgowalkwilltaketakewillbeknow;do句意“我不知道明晚參加邁克的生日聚會(huì)的事怎么做？”don’t后跟動(dòng)詞原形；whatto+動(dòng)詞形式，復(fù)合不定式結(jié)構(gòu)。2.think本句表達(dá)一客觀事實(shí)，主語parents是復(fù)數(shù)形式，故用一般現(xiàn)在時(shí)態(tài)。句意“我父母認(rèn)為我應(yīng)當(dāng)為下周的英語考試而學(xué)習(xí)”

。3.go;willbe本句是含if條件狀語從句的主從復(fù)合句；應(yīng)遵循主將從現(xiàn)原則。句意“如果我去參加聚會(huì)，他們會(huì)很失望。”4.tells;have

本句為but連接的并列句，后半句為一般現(xiàn)在時(shí)，故前半句也應(yīng)是一般現(xiàn)在時(shí)，主語Mike是第三人稱單數(shù)形式，故填tells；don’t后跟動(dòng)詞原形。5.wear;willlook

本句為含if條件狀語從句的主從復(fù)合句，應(yīng)循主將從現(xiàn)原則。句意“如果我穿牛仔，我看起來會(huì)很糟糕。”7.walk;willtake

本句為含if條件狀語從句的主從復(fù)合句，應(yīng)循主將從現(xiàn)原則。句意“如果我步行去，將會(huì)花費(fèi)我很多時(shí)間?！眛ake;willbe本句為含if條件狀語從句的主從復(fù)合句，應(yīng)循主將從現(xiàn)原則。

句意“如果我乘出租車去，又將會(huì)很貴?！?。advice是不可數(shù)名詞，不能說anadvice,而是apieceofadvice，“兩個(gè)建議”，我們通常說twopiecesofadvice.注意：piece要采用復(fù)數(shù)，advice不可數(shù)，但piece可數(shù)。我們也可以說為somepiecesofadvice一些建議。Tina’s

worriestogoornottogowhattowearhowtogetthereCouldyoupleasegivehersomeadvice?

Completethesentencesusingyourownideas.1.IfIgetuplatetomorrow,_______________________.

2.IfIdon’tfinishmyhomework,_____________________.

3.IfIdon’tgetenoughexercise,___________________.

4.Iwillnothaveenoughtimetostudyif______________________________.

5.Iwillnotmakeanyfriendsif__________________________.

IwillmisstheschoolbusmyteacherwillbeangryIwon’tbestrongIplaycomputergamesallthedayIalwaysmakethemupset3bPracticeWriteastorywithyourgrouponapieceofpaper.Thefirstpersonbeginsthestorywith“IthinkIwill…”Theothersaddsentenceswith“if”.Passthepaperaroundtwice.Thenreadthestory.IthinkIwillgotothemoviestonight.IfIgotothemovies,Iwon’tfinishmyhomework.IfIdon’tfinishmyhomework…Itiscalled“ChainReaction(連鎖反應(yīng))”or“ButterflyEffect（蝴蝶效應(yīng)）”.3cFuntimenow!Chainstory:IfIgetupat9:00tomorrow,I’llbelate.IfIamlate,theteacherwillbeveryangry.Iftheteacherisveryangry,hewillcallmymother.Ifhecallsmymother,shewillcry.Ifshecries,Iwillbesad.IfIamsad,Iwilleatalot.IfIeatalot,Iwillbeveryfat.IfIamveryfat,Iwon’tbehandsome.If…1.Ifitrainstomorrow,we_____visitthemuseum.A.don’tdoB.won’tgoC.aren’tgoD.didn’tgo.2.Willyougototheparkifit____fine?A.willbeB.wasC.isD/3.Ifyou__toschoollate,yourteacher_____angrywithyou.A.come;areB.come,willbeC.willcome;areD.willcome;willbeBCB4.Ifyou_____hard,youwill___successful.A.work,areB.works,isC.towork,beD.work,be5.IfI____toomuchTV,mymotherwill_______.A.watch,angryB.watched,beangryC.watch,beangryD.willwatch,beangryDCExercises一、選擇填空。1.________youdrive,youwillnotbelateforwork.A.If

B.Unless

(除非)

C.ThoughD.Or(否則)2.Thereisgoingto______asportsmeetingnextweek.Ifit_______,we’llhavetocancelit.A.be,doesn’trainB.have,willrain C.be,rainsD.have,rains3.I’mwaitingformyfriend.______,I’llgoshopping