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論在星期五晚上看錄象一半的學生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.我想我將會乘公共汽車去參加聚會。I_____I’lltakethebustothe______.2.如果你那樣做，你將會遲到。Ifyou_____,_____belate.3.我想我將待在家里。I__________stayathome.4.如果你那樣做，你將會覺得很抱歉。Ifyou____,__________sorry.5.如果他們今天聚會，將會發(fā)生什么事？_______________ifthey_____thepartytoday?6.如果他們今天聚會，班里一半的學生將不會去。Ifthey______thepartytoday,______theclass_______come.7.我們應當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，他們將會只帶薯條和巧克力。______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,條件狀語從句常用助動詞do(does/did)來替代上文所提到的動作。例如：We

will

gototheparkifit_____________(rain)tomorrow.Grammar

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

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

等情態(tài)動詞，從句用___________。一般現(xiàn)在時例如：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______充當或_______________________充當，副詞可以在句子中修飾動詞、形容詞、副詞或整個句子，表明方式，時間，地點、程度等，副詞一般譯成____________。副詞相當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。（副詞作時間狀語）

Iusuallyplayfootballontheplayground.（介詞短語作地點狀語）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條件狀語從句的復合句中主從句的時態(tài)if引導的條件狀語從句要遵循“主將從現(xiàn)”的規(guī)則。即if引導的條件狀語從句，主句用一般將來時(用will形式，不能用begoingto形式)，從句用一般現(xiàn)在時。?主句是一般將來時，從句用一般現(xiàn)在時。如：IfIgototheparty,I’llhaveagreattime.I’llhaveagreattimeifIgototheparty.從句主句一般現(xiàn)在時一般將來時從句主句一般現(xiàn)在時一般將來時句子結構：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，從句則用一般現(xiàn)在時IfmymotherisfreethisSunday,shewilltakemetothepark.Ifhecomes,hewilltellmeall.如：Ifyoueatbadfood,youmayfallill.?

主句謂語含有情態(tài)動詞may/might/can/must/should等，從句用一般現(xiàn)在時。從句主句一般現(xiàn)在時含情態(tài)動詞mayIfthetrafficlightsarered,youmuststopandwait.從句主句一般現(xiàn)在時含情態(tài)動詞mustYoucanpasstheexamifyouworkhard.從句主句一般現(xiàn)在時含情態(tài)動詞canRULE2:主情從現(xiàn)主句用情態(tài)動詞+動詞原形，從句用一般現(xiàn)在時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。(即主祈從現(xiàn))如：Ifthelightisred,waitforaminute.從句主句一般現(xiàn)在時祈使句Ifyouwanttohaveachat,callmeup.Don’twaitformeifIamlate.從句主句一般現(xiàn)在時祈使句從句主句一般現(xiàn)在時祈使句主祈從現(xiàn)RULE3:主祈從現(xiàn)主句用祈使句，從句用一般現(xiàn)在時Ifyouseehim,givehimthisnotebook.TellhimI’mnotathomeifsomeonecalls.2知識講解有些句子可與含if的條件狀語從句互相轉換。?有if引導的條件狀語從句的復合句中，當主句和從句的主語均為you時，可轉換為“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”，用來引導賓語從句，=whether，時態(tài)根據(jù)語境而定Sheaskedmeif/whetherIknewMike(ornot)．她問我是否認識邁克。Iwonderwhetherornothewillcometomyparty.我想知道他是否會來參加我的聚會。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的事怎么做？”don’t后跟動詞原形；whatto+動詞形式，復合不定式結構。2.think本句表達一客觀事實，主語parents是復數(shù)形式，故用一般現(xiàn)在時態(tài)。句意“我父母認為我應當為下周的英語考試而學習”

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

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

本句為含if條件狀語從句的主從復合句，應循主將從現(xiàn)原則。句意“如果我穿牛仔，我看起來會很糟糕?！?.walk;willtake

本句為含if條件狀語從句的主從復合句，應循主將從現(xiàn)原則。句意“如果我步行去，將會花費我很多時間?！眛ake;willbe本句為含if條件狀語從句的主從復合句，應循主將從現(xiàn)原則。

句意“如果我乘出租車去，又將會很貴。”。advice是不可數(shù)名詞，不能說anadvice,而是apieceofadvice，“兩個建議”，我們通常說twopiecesofadvice.注意：piece要采用復數(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)”or“ButterflyEffect（蝴蝶效應）”.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