Unit8SectionA3a3c课件人教版英语八年级上册

Unit8Let’s

Communicate！Let’s

Communicate！SectionAHowdowecommunicate?Grammar(3a-3c)P75

masterthestructureandusageofif-clausesinconditionalsentences.talkaboutconditionsandresultsusingtheif-clausesindifferentsituations.if引导的条件状语从句定义：复合句（由主句+从句组成）作条件状语的句子叫做条件状语从句。用于表示假设的情况及其可能产生的结果。条件状语从句常用if来引导。if引导的条件状语从句既可位于主句之______，也可位于主句之______。位于主句之前时，从句后面要用________与主句隔开。前后逗号Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou’renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I’llpickupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.从句主句从句主句从句主句从句主句从句主句If引导的条件状语从句用法_________theworldtofindyou._________thelighttoguideyou.IfI’llsailI’llbe_______youeverfindyourselfstcukinthemiddleofthesea,_______youeverfindyourselflostinthedarkandyoucan’tsee,If观察句子意思可以发现：在含有if引导的条件状语从句的复合句中，表示将来时态时，主句通常使用___________,而从句则使用___________，这被称作“_________”原则。跟在if后的是从句主句一般将来时一般现在时主将从现观察句子意思可以发现：在含有if引导的条件状语从句的复合句中，表示将来时态时，主句通常使用___________,而从句则使用___________，这被称作“_________”原则。一般将来时一般现在时主将从现Completethesentenceswiththewordsinthebox.3.Iftherehearsal_______(end)at7:00p.m.,Iwillpickyouupat7:15p.m.1.Ifyoustaycalmandsaysorry,it___________(help).2.IfIgothere,I___________(try)allthedeliciouslocalfood.willhelpwilltryendsTip:同样适用于“_________”原则的还有

：assoonas（一...就...）,aslongas(只要...)主将从现Completethesentenceswiththewordsinthebox.1.I___________（call)youassoonashe___________(arrive).2.Ibelievemydream_______________(cometrue)aslongasI________(study)hard.willcall

arriveswillcometruestudyReadthesentences.Findmoresentenceswithif-clausesinSectionA.lfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou'renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I'llpickyouupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.3a1.Ifitisfinetomorrow,wecangoswimmingwithTom.2.Ifyourparentsarebusy,youmusthelpthem.3.If

hegoestothemovies,hecan’tfinishhishomework.4.Ifyoudrivetoofast,youmayhaveanaccident.

如果主句含有__________的一般现在时，那么if引导的从句用______________。情态动词一般现在时态“主情从现”1.

Don’twaitformeifIamlate.2.Becarefulwithyourhomeworkifyoudon’twanttomakemistakes.3.TellTomtoaskmeforhelpifhehasproblemswithmath.如果主句为_______，那么if引导的从句用_____________。祈使句一般现在时态“主祈从现”在if引导的条件状语从句中：如果主句是一般将来时，从句用一般现在时，即“主将从现”。如果主句中是can,may,must等情态动词的一般现在时，从句用一般现在时，即“主情从现”。如果主句是祈使句，从句用一般现在时，即“主祈从现”。1.如果明天不下雨，我们就去野餐。Ifit____________(notrain)tomorrow,we__________(go)onapicnic.2.如果你努力学习，你就能通过考试。Ifyou______(study)hard,you_________(pass)theexam.3.

如果你见到他，请告诉他给我回电话。Ifyou______(see)him,______(tell)himtocallmeback.doesn’trainwillgostudycanpassseetellExercise完成句子。主将从现主祈从现主情从现合并句子Ifit____sunnytomorrow,they__________atrip.Itwillbesunnytomorrow.Theywillhaveatriptomorrow.iswillhaveThey__________atripifit____sunnytomorrow.iswillhave实践应用Openthewindow.Youfeelveryhot._______thewindowifyou_______veryhot.feelOpenIfyou______veryhot,______thewindow.feelopenIfhe________studyhard,he__________intheexam.Hewon’tstudyhard.Hewillfailintheexam.doesn’twillfailHe_________intheexamifhe________studyhard.doesn’twillfailIfhe_______hurryup,he__________theearlybus.Hewon’thurryup.Hewillmisstheearlybus.doesn’twillmissHe__________theearlybusifhe________hurryup.willmissdoesn’thavedifficultyindoingsthA.trytexting.B.we'llunderstandeachotherbetter.C.youcanwritethingsdown

forhim.D.I'llcallyourightaway.E.I'llcallataxiforyou.F.willyoujoinmefordinner?n./ˈmiːtɪŋ/n./ˈdɪfɪkəlti/Matchthetwopartstomakesentences.3bFindthekeywordsfirst!1.Ifwecanhaveaface-to-face

meeting,2.IfIhavegoodnews,3.Ifyouneedtoleave,4.Ifyoucanfinishyourworkearlytoday,5.Iftheoldmanhasdifficultiesin

hearing,6.Ifyoucan'treachhimbyphone,Ifthings______(go)well,we_______(see)allthoseoldfacesagain.Justthinkhowgreatitwillbe!Ifyouthinkyoucancome,_______(drop)mealineandI________(give)youallthedetailsaboutthereunion.Butpromisemeyou’llthinkaboutitseriously.

Fillintheblankswiththecorrectformsoftheverbsinbrackets.Thendiscusswhatthesituationsareandwhomtheinformationisfor.dropsb.aline=writetosb....gowillseedropwillgiven./laɪn/adv./ˈsɪərɪəslɪ/detaln./ˈdiːteɪl/n./ˌriːˈjuːniən/3cHey,it’sme.Iwantedtotalktoyouaboutthetrainingplanforourteam.Thenewseasoniscoming,soit’stimetomakeaplanforourtraining.Ifwe

_________

(start)earlierthisyear,Ithinkwe

_____________

(perform)better.

_________

(give)meacalland

_______

(let)meknowifyou

_______(think)ofagoodtimeforeveryonetomeet.Talktoyousoon!startwillperformGiveletthink

n./ˈtreɪnɪŋ/

Fillintheblankswiththecorrectformsoftheverbsinbrackets.Thendiscusswhatthesituationsareandwhomtheinformationisfor.3cWhatsituationiseachtextabout?Whoistheinformationfor?Situation:

Organizingaclassreunion.Audience:

Anoldclassmate/friend.Let’sdiscussANOTE便条AVOICEMESSAGE语音留言Situation:

Planningasportsteam’strainingschedule.Audience:

Ateammate/coach.trainingn.

训练；培训trainv.

培训；训练1.Iftheoldmanhasdifficultiesinhearing,...如果老人听力有困难，……difficulty名词,“困难;难题”,其常见用法如下:havedifficulty/trouble/problems(in)doingsth做某事有困难►Hehasdifficulty(in)___________English.他讲英语有困难。►Shehas___________(difficult)infinishingthistask.

她完成这项任务很困难。Languagepointsspeakingdifficulty2.Butpromisemeyou’llthinkaboutitseriously.但答应我你会认真考虑。seriously副词,“严肃地;认真地”。take...seriously意为“认真对待…”Don’ttakeitseriously—he’sonlyjoking.别把它当真,他只是在开玩笑。【拓展】形容词形式：serious意为“严肃的;认真的”beseriousabout...对……认真Languagepoints按要求写出正确的单词、词组或句子。会议(名词)__________2.困难(名词)___________3.立即；马上(动词)__________ 4.字行(名词)__________5.给……写信(短语)__________ 6.细节(名词)__________7.团聚（名词）__________ 8.严肃地（副词）________9.如果用词不当，发短信能使事情更糟。___________________________10.如果你保持冷静并且抱歉，这将帮助。_______________________11.如果我去那里，我将尝试所有美味的当地食物。___________________meetingdifficultyrightawaylinedrawsb.alinedetailreunionseriouslyTextingcanmakethingsworseifyou’renotcarefulwithyourwords.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.SummaryExerciseI.用括号内所给内容的适当形式填空。1.Don’tplayfootballoutsideifit_______(rain)thisafternoon.2.Ifyoudon’tlistencarefully,you____________(notknow)theanswer.3.Amyissoconfident.Shethinksshecandoanythingifshe______(try)herbest.4.______(tell)Jimthegoodnewsifyou_______(meet)himtomorrowmorning.5.Myaunt__________(take)mycousinandmetotheconcertifshe______(get)thetickets.rainswon’tknowtriesTellmeetwilltakegets1.I’llhavefunifIvisitthesciencemuseum.(对划线部分提问)______________________ifyouvisitthesciencemuseum?2.FinishyourhomeworkandyoucanwatchTV.(改为复合句)______youfinishyourhomework,you_____watchTV.3.Icanfinishtheworkontime.He’ll